CA2296246A1 - Benzotriazole uv absorbers having enhanced durability - Google Patents
Benzotriazole uv absorbers having enhanced durability Download PDFInfo
- Publication number
- CA2296246A1 CA2296246A1 CA002296246A CA2296246A CA2296246A1 CA 2296246 A1 CA2296246 A1 CA 2296246A1 CA 002296246 A CA002296246 A CA 002296246A CA 2296246 A CA2296246 A CA 2296246A CA 2296246 A1 CA2296246 A1 CA 2296246A1
- Authority
- CA
- Canada
- Prior art keywords
- carbon atoms
- phenyl
- tert
- alkyl
- straight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 38
- 239000012964 benzotriazole Substances 0.000 title abstract description 43
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 title abstract description 29
- 150000001875 compounds Chemical class 0.000 claims abstract description 160
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims abstract description 93
- 239000000203 mixture Substances 0.000 claims abstract description 76
- 125000003884 phenylalkyl group Chemical group 0.000 claims abstract description 38
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims abstract description 28
- 238000000576 coating method Methods 0.000 claims abstract description 24
- 125000005010 perfluoroalkyl group Chemical group 0.000 claims abstract description 22
- -1 3-oxapentamethylene Chemical group 0.000 claims description 147
- 125000004432 carbon atom Chemical group C* 0.000 claims description 135
- 125000000217 alkyl group Chemical group 0.000 claims description 78
- 239000001257 hydrogen Substances 0.000 claims description 72
- 229910052739 hydrogen Inorganic materials 0.000 claims description 72
- 150000002431 hydrogen Chemical class 0.000 claims description 43
- 150000001565 benzotriazoles Chemical class 0.000 claims description 37
- 229920001577 copolymer Polymers 0.000 claims description 34
- 125000003342 alkenyl group Chemical group 0.000 claims description 27
- 229920000642 polymer Polymers 0.000 claims description 27
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 26
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 24
- 150000003254 radicals Chemical class 0.000 claims description 19
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 18
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- 239000011248 coating agent Substances 0.000 claims description 16
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- 150000001412 amines Chemical class 0.000 claims description 15
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 15
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 14
- 125000001153 fluoro group Chemical group F* 0.000 claims description 14
- 125000001424 substituent group Chemical group 0.000 claims description 14
- CUVYXWPVMUJMAU-UHFFFAOYSA-N 2,4-bis(2-methylbutan-2-yl)-6-[5-(trifluoromethyl)benzotriazol-2-yl]phenol Chemical compound CCC(C)(C)C1=CC(C(C)(C)CC)=CC(N2N=C3C=C(C=CC3=N2)C(F)(F)F)=C1O CUVYXWPVMUJMAU-UHFFFAOYSA-N 0.000 claims description 13
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- RWRDLPDLKQPQOW-UHFFFAOYSA-N Pyrrolidine Chemical compound C1CCNC1 RWRDLPDLKQPQOW-UHFFFAOYSA-N 0.000 claims description 12
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- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 10
- 239000011368 organic material Substances 0.000 claims description 10
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- 230000015556 catabolic process Effects 0.000 claims description 9
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- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 claims description 9
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- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 claims description 8
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- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 claims description 6
- WMBMNOPFBSLJLS-UHFFFAOYSA-N 4-(3-hydroxypropyl)-2-[5-(trifluoromethyl)benzotriazol-2-yl]phenol Chemical compound OCCCC1=CC=C(O)C(N2N=C3C=C(C=CC3=N2)C(F)(F)F)=C1 WMBMNOPFBSLJLS-UHFFFAOYSA-N 0.000 claims description 5
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- FXUZBFKATOWFLD-UHFFFAOYSA-N 6-methylheptyl 3-[3-tert-butyl-4-hydroxy-5-[5-(trifluoromethyl)benzotriazol-2-yl]phenyl]propanoate Chemical compound CC(C)(C)C1=CC(CCC(=O)OCCCCCC(C)C)=CC(N2N=C3C=C(C=CC3=N2)C(F)(F)F)=C1O FXUZBFKATOWFLD-UHFFFAOYSA-N 0.000 claims description 4
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- JMGAGEUAMQQJAD-UHFFFAOYSA-N methyl 3-[3-tert-butyl-4-hydroxy-5-[5-(trifluoromethyl)benzotriazol-2-yl]phenyl]propanoate Chemical compound CC(C)(C)C1=CC(CCC(=O)OC)=CC(N2N=C3C=C(C=CC3=N2)C(F)(F)F)=C1O JMGAGEUAMQQJAD-UHFFFAOYSA-N 0.000 claims description 4
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- MMPCZTQLVSESIT-UHFFFAOYSA-N 3-[3-tert-butyl-4-hydroxy-5-[5-(trifluoromethyl)benzotriazol-2-yl]phenyl]propanoic acid Chemical compound CC(C)(C)C1=CC(CCC(O)=O)=CC(N2N=C3C=C(C=CC3=N2)C(F)(F)F)=C1O MMPCZTQLVSESIT-UHFFFAOYSA-N 0.000 claims description 3
- VQBWHLAHWBTSPR-UHFFFAOYSA-N 3-[4-hydroxy-3-[5-(trifluoromethyl)benzotriazol-2-yl]phenyl]propyl propanoate Chemical compound CCC(=O)OCCCC1=CC(N2N=C3C=CC(=CC3=N2)C(F)(F)F)=C(O)C=C1 VQBWHLAHWBTSPR-UHFFFAOYSA-N 0.000 claims description 3
- YBGAHDSWZZNBNR-UHFFFAOYSA-N 4-(2-hydroxyethyl)-2-[5-(trifluoromethyl)benzotriazol-2-yl]phenol Chemical compound OCCC1=CC=C(O)C(N2N=C3C=C(C=CC3=N2)C(F)(F)F)=C1 YBGAHDSWZZNBNR-UHFFFAOYSA-N 0.000 claims description 3
- GIXUOHIZMFNXGJ-UHFFFAOYSA-N 4-tert-butyl-2-[5-(1,1,2,2,2-pentafluoroethyl)benzotriazol-2-yl]phenol Chemical compound CC(C)(C)C1=CC(N2N=C3C=CC(=CC3=N2)C(F)(F)C(F)(F)F)=C(O)C=C1 GIXUOHIZMFNXGJ-UHFFFAOYSA-N 0.000 claims description 3
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- 150000003839 salts Chemical class 0.000 claims description 3
- HJIAMFHSAAEUKR-UHFFFAOYSA-N (2-hydroxyphenyl)-phenylmethanone Chemical class OC1=CC=CC=C1C(=O)C1=CC=CC=C1 HJIAMFHSAAEUKR-UHFFFAOYSA-N 0.000 claims description 2
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- MHSKRLJMQQNJNC-UHFFFAOYSA-N terephthalamide Chemical compound NC(=O)C1=CC=C(C(N)=O)C=C1 MHSKRLJMQQNJNC-UHFFFAOYSA-N 0.000 description 1
- JRMUNVKIHCOMHV-UHFFFAOYSA-M tetrabutylammonium bromide Chemical compound [Br-].CCCC[N+](CCCC)(CCCC)CCCC JRMUNVKIHCOMHV-UHFFFAOYSA-M 0.000 description 1
- WUPCFMITFBVJMS-UHFFFAOYSA-N tetrakis(1,2,2,6,6-pentamethylpiperidin-4-yl) butane-1,2,3,4-tetracarboxylate Chemical compound C1C(C)(C)N(C)C(C)(C)CC1OC(=O)CC(C(=O)OC1CC(C)(C)N(C)C(C)(C)C1)C(C(=O)OC1CC(C)(C)N(C)C(C)(C)C1)CC(=O)OC1CC(C)(C)N(C)C(C)(C)C1 WUPCFMITFBVJMS-UHFFFAOYSA-N 0.000 description 1
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- 125000005591 trimellitate group Chemical group 0.000 description 1
- FDGZUBKNYGBWHI-UHFFFAOYSA-N trioctadecyl phosphate Chemical compound CCCCCCCCCCCCCCCCCCOP(=O)(OCCCCCCCCCCCCCCCCCC)OCCCCCCCCCCCCCCCCCC FDGZUBKNYGBWHI-UHFFFAOYSA-N 0.000 description 1
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 description 1
- AZSKHRTUXHLAHS-UHFFFAOYSA-N tris(2,4-di-tert-butylphenyl) phosphate Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(=O)(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C AZSKHRTUXHLAHS-UHFFFAOYSA-N 0.000 description 1
- OOZBTDPWFHJVEK-UHFFFAOYSA-N tris(2-nonylphenyl) phosphate Chemical compound CCCCCCCCCC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)CCCCCCCCC)OC1=CC=CC=C1CCCCCCCCC OOZBTDPWFHJVEK-UHFFFAOYSA-N 0.000 description 1
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- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic System
- C07F9/02—Phosphorus compounds
- C07F9/547—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
- C07F9/6515—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having three nitrogen atoms as the only ring hetero atoms
- C07F9/6518—Five-membered rings
- C07F9/65188—Five-membered rings condensed with carbocyclic rings or carbocyclic ring systems
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4114—Elements with sockets
- E04B1/4121—Elements with sockets with internal threads or non-adjustable captive nuts
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D249/00—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms
- C07D249/16—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms condensed with carbocyclic rings or ring systems
- C07D249/18—Benzotriazoles
- C07D249/20—Benzotriazoles with aryl radicals directly attached in position 2
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
- C08K5/3472—Five-membered rings
- C08K5/3475—Five-membered rings condensed with carbocyclic rings
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/48—Stabilisers against degradation by oxygen, light or heat
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4114—Elements with sockets
- E04B1/415—Elements with sockets with captive and extendable anchoring parts, e.g. spring-loaded bolts, hanging rings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
- B41M5/337—Additives; Binders
- B41M5/3375—Non-macromolecular compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/382—Contact thermal transfer or sublimation processes
- B41M5/392—Additives, other than colour forming substances, dyes or pigments, e.g. sensitisers, transfer promoting agents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
- Y10S430/132—Anti-ultraviolet fading
Abstract
Benzotriazole UV absorbers which are substituted at the 5-position of the benzo ring by an electron withdrawing group exhibit enhanced durability and very low loss rates when incorporated into automotive coatings. This is particularly the case when the 3-position of the phenyl ring is also substituted by phenyl or phenylalkyl such as a-cumyl.
Compounds where the 5-position of the benzo ring are substituted by perfluoroalkyl such as trifluoromethyl are particularly of interest for both their enhanced durability and for their excellent solubility and excellent color properties in some thermoplastic compositions.
Compounds where the 5-position of the benzo ring are substituted by perfluoroalkyl such as trifluoromethyl are particularly of interest for both their enhanced durability and for their excellent solubility and excellent color properties in some thermoplastic compositions.
Description
-Benzotriazole UV Absorbers Having Enhanced Durability Benzotriazole UV absorbers being substituted in the benzo ring by electron withdrawing moieties exhibit enhanced durability and low loss rates when incorporated into automotive coatings and thermoplastic compositions.
The benzotriazoles have long been an important class of UV absorbers and have gained wide commercial importance and acceptance for many industrial applications.
The prior art is replete with references to their manufacture and utility. However, as requirements become ever more stringent and demanding, the search for still more stable and durable benzotriazoles continues. The gradual phase out of hazardous air polluting solvents (NAPS), such as xylene, because of environmental concerns and their replacement with non-NAPS
solvents, such as esters, ethers or ketones, and increased durability requirements for automotive coatings make this search more urgent. Indeed, the automotive industry is most concerned about UVA tosses from automotive paints and coatings as seen in the publication by J. L. Gerlock et al., Proc. 36th Annual Tech. Sym. (Cleveland Coating Society), May 18, 1993.
Vysokomol Soedin, Ser. A, 18(3), 553 (1976) describes the linear dependence of hydrogen bond strength and photostability in benzotriazoles.
J. E. Pickett et al., Angew. Makromol. Chem. 232, 229 (1995) describe the photodegradation of benzotriazole UV absorbers in poly(methyl methacrylate) films. Structural variation generally caused only small differences in the rates of degradation unless the substitution disrupted the intramolecular hydrogen bonds which are critical for stability.
Pickett et al. did not test any benzotriazoles containing both electron withdrawing and electron donating groups as in the instant invention.
J. Catalan et al., J. Am. Chem. Soc., 114, 964 (1992) and H. J. Heller, Eur.
Polymer J.
Suppl. 1969, 105 both suggest that a bulky substituent such as tert-butyl ortho to the hydroxy group on the phenyl ring will increase stability in highly polar systems.
The prior art leads one to the conclusion that strengthening the hydrogen bond leads to a more stable benzotriazole, but does not teach how this can be accomplished.
The instant invention discloses benzotriazoles which exhibit enhanced durability, but surprisingly this enhanced durability is not always related to greater hydrogen bond strength.
Indeed, compounds with enhanced durability often have weaker, not stronger hydrogen bonds United States Patent Nos. 4,226,763; 4,278,589; 4,315,848; 4,275,004;
4,347,180;
5,554,760; 5,563,242; 5,574,166 and 5,607,987 describe selected benzotriazoles, substituted in the 3-position of the hydroxyphenyl ring by an a-cumyl group, which show very good durability in automotive coatings. These benzotriazoles represent the present state of the art. The instant invention is directed at preparing benzotriazoles which exhibit still better durability and low loss rates from the prior art benzotriazoles.
United States Patent Nos. 5,278,314; 5,280,124; 5,436,349 and 5,516,914 describe red-shifted benzotriazoles. These benzotriazoles are substituted in the 3-position of the phenyl ring with an a-cumyl group and at the 5-position of the benzo ring by thio ethers, alkylsulfonyl or phenylsulfonyl moieties. Red-shifting the benzotriazoles is desirable for spectral reasons.
A group at the 5-position which is also electron withdrawing provides additional benefits in low loss rates and durability as found in the instant invention. When such sulfonyl substituents are combined with specifically a-cumyl moieties, extremely durable compounds result which, due to the bulk of the a-cumyl moiety have sufficiently low volatility to be useful in coating and other polymer systems.
The presence of an a-cumyl or phenyl group ortho to the hydroxy group on the phenyl ring exerts a surprisingly large positive effect on benzotriazole photostability in coatings and photographic gel systems. The magnitude of this effect, particularly when compared to a tert-butyl group in that position, is well beyond prediction. The combination of both an electron withdrawing group on the benzo ring and an a-cumyl or phenyl group on the phenyl ring in the same molecule leads to extremely desirable properties in coating systems when high UV absorber permanence is critical.
Novel compounds meeting these parameters as being extremely stable in aggressive use environments constitute a first portion of this invention.
The presence of the electron withdrawing moiety at the 5-position of the benzo ring has a powerful stabilizing effect on benzotriazoles in general and is observed in other polymer systems such as polycarbonate and polyvinyl chloride) substrates as well.
However, the effect of having an a-cumyl or phenyl group ortho to the hydroxy moiety on the phenyl ring is much smaller to non-existent in some polymer systems such as polycarbonate or polyvinyl chloride) even though critical for coating systems as described above.
The benzotriazoles have long been an important class of UV absorbers and have gained wide commercial importance and acceptance for many industrial applications.
The prior art is replete with references to their manufacture and utility. However, as requirements become ever more stringent and demanding, the search for still more stable and durable benzotriazoles continues. The gradual phase out of hazardous air polluting solvents (NAPS), such as xylene, because of environmental concerns and their replacement with non-NAPS
solvents, such as esters, ethers or ketones, and increased durability requirements for automotive coatings make this search more urgent. Indeed, the automotive industry is most concerned about UVA tosses from automotive paints and coatings as seen in the publication by J. L. Gerlock et al., Proc. 36th Annual Tech. Sym. (Cleveland Coating Society), May 18, 1993.
Vysokomol Soedin, Ser. A, 18(3), 553 (1976) describes the linear dependence of hydrogen bond strength and photostability in benzotriazoles.
J. E. Pickett et al., Angew. Makromol. Chem. 232, 229 (1995) describe the photodegradation of benzotriazole UV absorbers in poly(methyl methacrylate) films. Structural variation generally caused only small differences in the rates of degradation unless the substitution disrupted the intramolecular hydrogen bonds which are critical for stability.
Pickett et al. did not test any benzotriazoles containing both electron withdrawing and electron donating groups as in the instant invention.
J. Catalan et al., J. Am. Chem. Soc., 114, 964 (1992) and H. J. Heller, Eur.
Polymer J.
Suppl. 1969, 105 both suggest that a bulky substituent such as tert-butyl ortho to the hydroxy group on the phenyl ring will increase stability in highly polar systems.
The prior art leads one to the conclusion that strengthening the hydrogen bond leads to a more stable benzotriazole, but does not teach how this can be accomplished.
The instant invention discloses benzotriazoles which exhibit enhanced durability, but surprisingly this enhanced durability is not always related to greater hydrogen bond strength.
Indeed, compounds with enhanced durability often have weaker, not stronger hydrogen bonds United States Patent Nos. 4,226,763; 4,278,589; 4,315,848; 4,275,004;
4,347,180;
5,554,760; 5,563,242; 5,574,166 and 5,607,987 describe selected benzotriazoles, substituted in the 3-position of the hydroxyphenyl ring by an a-cumyl group, which show very good durability in automotive coatings. These benzotriazoles represent the present state of the art. The instant invention is directed at preparing benzotriazoles which exhibit still better durability and low loss rates from the prior art benzotriazoles.
United States Patent Nos. 5,278,314; 5,280,124; 5,436,349 and 5,516,914 describe red-shifted benzotriazoles. These benzotriazoles are substituted in the 3-position of the phenyl ring with an a-cumyl group and at the 5-position of the benzo ring by thio ethers, alkylsulfonyl or phenylsulfonyl moieties. Red-shifting the benzotriazoles is desirable for spectral reasons.
A group at the 5-position which is also electron withdrawing provides additional benefits in low loss rates and durability as found in the instant invention. When such sulfonyl substituents are combined with specifically a-cumyl moieties, extremely durable compounds result which, due to the bulk of the a-cumyl moiety have sufficiently low volatility to be useful in coating and other polymer systems.
The presence of an a-cumyl or phenyl group ortho to the hydroxy group on the phenyl ring exerts a surprisingly large positive effect on benzotriazole photostability in coatings and photographic gel systems. The magnitude of this effect, particularly when compared to a tert-butyl group in that position, is well beyond prediction. The combination of both an electron withdrawing group on the benzo ring and an a-cumyl or phenyl group on the phenyl ring in the same molecule leads to extremely desirable properties in coating systems when high UV absorber permanence is critical.
Novel compounds meeting these parameters as being extremely stable in aggressive use environments constitute a first portion of this invention.
The presence of the electron withdrawing moiety at the 5-position of the benzo ring has a powerful stabilizing effect on benzotriazoles in general and is observed in other polymer systems such as polycarbonate and polyvinyl chloride) substrates as well.
However, the effect of having an a-cumyl or phenyl group ortho to the hydroxy moiety on the phenyl ring is much smaller to non-existent in some polymer systems such as polycarbonate or polyvinyl chloride) even though critical for coating systems as described above.
In addition to being more photostable, the compounds of this invention are red-shifted, absorbing strongly in the 350-400 nm wavelength range. While such red-shifting is desirable in that a greater portion of the UV spectrum is absorbed, this can also introduce color if the absorption beyond 400 nm is significant. This can limit the use of such compounds, particularly in systems such as polycarbonate glazing applications or present difficulties in various pigmented systems.
It is found that the nature of the substituent ortho to the hydroxyl group on the phenyl ring has an unexpected impact on color imparted to the substrate by the benzotriazole. Thus, relatively subtle differences in substitution on the phenyl ring can have a large impact on the resulting color and the applicability of the benzotriazole in specific color sensitive applications. There are striking differences between having hydrogen, alkyl or a-cumyl at this 3-position.
Furthermore, it is found that, when the 5-position of the benzo ring is substituted with a perfluoralkylgroup, in particular a trifluoromethyl group, the resulting benzotriazole not only exhibits the same or greater enhanced stability when incorporated into thermoplastic resins, but also imparts less color than related benzotriazoles substituted at the 5-position with other electron withdrawing moieties such as sulfonyl or carbonyl. These perfluoralkyl compounds also absorb strongly in the 350-400 nm wavelength range despite the low color and are extremely compatible in a wide range of substrates such as acrylic resins, hydrocarbons, polycarbonates and polyvinyl chloride).
There are a multitude of general references to benzotriazoles having in the 5-position of the benzo ring electron withdrawing groups such as esters, amides, sulfones and the like that are not substituted in the 3-position of the phenyl ring by an a-cumyl or phenyl moiety. In many of these references the broadly described compounds are unexemplified and no teaching or appreciation taught of the positive effect on photostability described in this invention. In any event, the vast majority of these structures fall well outside the scope of instant invention.
Perfluoroalkyl, specifically trifluoromethyl, is an ideal substituent for the 5-position of the benzo ring. The prior art relevant to this substituent is very limited and exemplifies none of the instant compounds. As a result, said prior art naturally fails to point out the important advantages regarding stability, color and compatibility achievable with the 5-perfluoralkyl substituted benzotriazoles of this invention.
It is found that the nature of the substituent ortho to the hydroxyl group on the phenyl ring has an unexpected impact on color imparted to the substrate by the benzotriazole. Thus, relatively subtle differences in substitution on the phenyl ring can have a large impact on the resulting color and the applicability of the benzotriazole in specific color sensitive applications. There are striking differences between having hydrogen, alkyl or a-cumyl at this 3-position.
Furthermore, it is found that, when the 5-position of the benzo ring is substituted with a perfluoralkylgroup, in particular a trifluoromethyl group, the resulting benzotriazole not only exhibits the same or greater enhanced stability when incorporated into thermoplastic resins, but also imparts less color than related benzotriazoles substituted at the 5-position with other electron withdrawing moieties such as sulfonyl or carbonyl. These perfluoralkyl compounds also absorb strongly in the 350-400 nm wavelength range despite the low color and are extremely compatible in a wide range of substrates such as acrylic resins, hydrocarbons, polycarbonates and polyvinyl chloride).
There are a multitude of general references to benzotriazoles having in the 5-position of the benzo ring electron withdrawing groups such as esters, amides, sulfones and the like that are not substituted in the 3-position of the phenyl ring by an a-cumyl or phenyl moiety. In many of these references the broadly described compounds are unexemplified and no teaching or appreciation taught of the positive effect on photostability described in this invention. In any event, the vast majority of these structures fall well outside the scope of instant invention.
Perfluoroalkyl, specifically trifluoromethyl, is an ideal substituent for the 5-position of the benzo ring. The prior art relevant to this substituent is very limited and exemplifies none of the instant compounds. As a result, said prior art naturally fails to point out the important advantages regarding stability, color and compatibility achievable with the 5-perfluoralkyl substituted benzotriazoles of this invention.
German Offen. 1,670,951 describes inter alia the use of methylene (or alkylidene) bis-benzotriazoles substituted with electron withdrawing groups in polymeric resins. Especially useful are the asymmetrical compounds where only one benzotriazole moiety is substituted.
Such asymmetric compounds have considerably less color.
German 116,320 provides a method of preparing benzotriazole N-oxide intermediates which can be converted into dyes and light stabilizers. The N-oxide of 5-trifluoromethyl-2-(2-hydroxy-5-methylphenyl)-2H-benzotriazole is disclosed. This N-oxide could be reduced to the corresponding benzotriazole which is substituted at the 5-position of the phenyl ring.
However, this benzotriazole is clearly outside the scope of the instant claims. Other related light stabilizer intermediates are generically disclosed in this reference, but none where ever converted to actual benzotriazole UV absorbers. The outstanding properties of such benzotriazole UV absorbers clearly went undiscovered.
Japanese Hei 3-57690 claims a color developer sheet compositions containing salicylic acid salts and benzotriazoles. Broadly described are benzotriazoles which may be substituted on the benzo ring with unspecified trihalomethyl. However, other benzotriazole ring substituents also are broadly described to include unspecified alkyl, alkoxy, aryloxy, amino, cyano, acyl, nitro and halogen. The only benzotriazoles named as typical examples are either unsubstituted on the benzo ring or substituted by chlorine. The preference is for liquid compounds. The 3-position of the phenyl ring is specified as tert-alkyl. While this reference broadly discloses a wide variety of benzotriazole derivatives in its photographic compositions many are electron donating and produce compounds which are in photostability inferior not only to the instant compounds, but also to standard unsubstituted benzotriazoles. No examples or differentiation between within this diverse array is seen.
Further, while generic trihalomethyl is described, no compounds of this description are shown or further described in any way. Additionally, trichloro, tribromo and triiodo compounds are clearly outside the scope of the instant invention.
Japanese Sho 47-15210 describes resin compositions containing selected benzotriazoles substituted by a fluorinated alkyl. The generic structures allows for a fluorinated alkyl, but not necessarily perfluorinated alkyl, to be added to either or both the benzo or phenyl rings at any position (the substituents are floating in the generial formula). Non-fluorinated substituents, one on each ring, are defined as hydrogen, halogen, hydroxy, alkyl and alkoxy with no other more specific description. The exemplified resins are polyvinyl chloride), polycarbonate, ABS and nylon. Seven compounds are specifically exemplified all outside the scope of the instant invention plus one composition containing 2-(2-hydroxy-5-methylphenyl)-2H-benzotriazole. No physical data or synthesis for any of these seven compounds are given.
The seven compounds exemplified in the Japanese reference are given below:
a. 2-(2-hydroxy-4-trifluoromethylphenyl)-2H-benzotriazole;
b. 5-methyl-2-(2-hydroxy-4-trifluoromethylphenyl)-2H-benzotriazole;
c. 5-methoxy-2-(2-hydroxy-4-trifluoromethylphenyl)-2H-benzotriazole;
d. 5-chloro-2-(2-hydroxy-4-trifluoromethylphenyl)-2H-benzotriazole;
e. 5-peroxymethoxy-2-(2-hydroxy-4-methylphenyl)-2H-benzotriazole;
f. 5-perfluorooctyl-2-(2-hydroxy-4-methylphenyl)-2H-benzotriazole; and g.5-perfluorooctyl-2-(2-hydroxy-4-trifluoromethylphenyl)-2H- benzo triazole.
There are several distinct differences between the disclosure of this Japanese reference and the instant invention. First all the exemplified compounds of the Japanese reference are substituted in the 4-position of the phenyl ring by groups other than hydrogen. The reference allows for substitution of either fluoroalkyl or fluoroalkoxy on any site on either ring as a means of providing for an improved UV absorber. Data given in this application shows this teaching to be inaccurate. Electron withdrawing moities on the phenyl ring as found in a, b, c, d, and g above, are shown to provide compounds with less durability than unsubstituted derivatives. Spectral coverage in the red region is also compromised.
Significantly, 2-(2-hydroxy-5-trifluoromethylphenyl)-2H-benzotriazole which is very similar to compound a above, is blue-shifted relative to benzotriazoles such as 2-(2-hydroxy-5-methylphenyl)-2H-benzotriazole. Blue-shifting is undesirable since the need for coverage in the 350-400 nm region is critical for UV absorbers.
An electron donating group at the 5-position of the benzo ring such as the ether compound c above reduces stability. While the Japanese reference states fluoroalkyl or fluoroalkoxy radical leads to enhanced stability under light, the instant invention shows that it is the electron withdrawing nature of the group at the 5-position on the benzo ring that confers greater photostability. No such inference is seen in the Japanese reference, and the electron donating ether even a fluorinated ether is counterindicated for enhanced stability.
Such asymmetric compounds have considerably less color.
German 116,320 provides a method of preparing benzotriazole N-oxide intermediates which can be converted into dyes and light stabilizers. The N-oxide of 5-trifluoromethyl-2-(2-hydroxy-5-methylphenyl)-2H-benzotriazole is disclosed. This N-oxide could be reduced to the corresponding benzotriazole which is substituted at the 5-position of the phenyl ring.
However, this benzotriazole is clearly outside the scope of the instant claims. Other related light stabilizer intermediates are generically disclosed in this reference, but none where ever converted to actual benzotriazole UV absorbers. The outstanding properties of such benzotriazole UV absorbers clearly went undiscovered.
Japanese Hei 3-57690 claims a color developer sheet compositions containing salicylic acid salts and benzotriazoles. Broadly described are benzotriazoles which may be substituted on the benzo ring with unspecified trihalomethyl. However, other benzotriazole ring substituents also are broadly described to include unspecified alkyl, alkoxy, aryloxy, amino, cyano, acyl, nitro and halogen. The only benzotriazoles named as typical examples are either unsubstituted on the benzo ring or substituted by chlorine. The preference is for liquid compounds. The 3-position of the phenyl ring is specified as tert-alkyl. While this reference broadly discloses a wide variety of benzotriazole derivatives in its photographic compositions many are electron donating and produce compounds which are in photostability inferior not only to the instant compounds, but also to standard unsubstituted benzotriazoles. No examples or differentiation between within this diverse array is seen.
Further, while generic trihalomethyl is described, no compounds of this description are shown or further described in any way. Additionally, trichloro, tribromo and triiodo compounds are clearly outside the scope of the instant invention.
Japanese Sho 47-15210 describes resin compositions containing selected benzotriazoles substituted by a fluorinated alkyl. The generic structures allows for a fluorinated alkyl, but not necessarily perfluorinated alkyl, to be added to either or both the benzo or phenyl rings at any position (the substituents are floating in the generial formula). Non-fluorinated substituents, one on each ring, are defined as hydrogen, halogen, hydroxy, alkyl and alkoxy with no other more specific description. The exemplified resins are polyvinyl chloride), polycarbonate, ABS and nylon. Seven compounds are specifically exemplified all outside the scope of the instant invention plus one composition containing 2-(2-hydroxy-5-methylphenyl)-2H-benzotriazole. No physical data or synthesis for any of these seven compounds are given.
The seven compounds exemplified in the Japanese reference are given below:
a. 2-(2-hydroxy-4-trifluoromethylphenyl)-2H-benzotriazole;
b. 5-methyl-2-(2-hydroxy-4-trifluoromethylphenyl)-2H-benzotriazole;
c. 5-methoxy-2-(2-hydroxy-4-trifluoromethylphenyl)-2H-benzotriazole;
d. 5-chloro-2-(2-hydroxy-4-trifluoromethylphenyl)-2H-benzotriazole;
e. 5-peroxymethoxy-2-(2-hydroxy-4-methylphenyl)-2H-benzotriazole;
f. 5-perfluorooctyl-2-(2-hydroxy-4-methylphenyl)-2H-benzotriazole; and g.5-perfluorooctyl-2-(2-hydroxy-4-trifluoromethylphenyl)-2H- benzo triazole.
There are several distinct differences between the disclosure of this Japanese reference and the instant invention. First all the exemplified compounds of the Japanese reference are substituted in the 4-position of the phenyl ring by groups other than hydrogen. The reference allows for substitution of either fluoroalkyl or fluoroalkoxy on any site on either ring as a means of providing for an improved UV absorber. Data given in this application shows this teaching to be inaccurate. Electron withdrawing moities on the phenyl ring as found in a, b, c, d, and g above, are shown to provide compounds with less durability than unsubstituted derivatives. Spectral coverage in the red region is also compromised.
Significantly, 2-(2-hydroxy-5-trifluoromethylphenyl)-2H-benzotriazole which is very similar to compound a above, is blue-shifted relative to benzotriazoles such as 2-(2-hydroxy-5-methylphenyl)-2H-benzotriazole. Blue-shifting is undesirable since the need for coverage in the 350-400 nm region is critical for UV absorbers.
An electron donating group at the 5-position of the benzo ring such as the ether compound c above reduces stability. While the Japanese reference states fluoroalkyl or fluoroalkoxy radical leads to enhanced stability under light, the instant invention shows that it is the electron withdrawing nature of the group at the 5-position on the benzo ring that confers greater photostability. No such inference is seen in the Japanese reference, and the electron donating ether even a fluorinated ether is counterindicated for enhanced stability.
Furthermore, all examples in the Japanese reference bear only one substituent on the phenyl ring and that is specifically at the 4-position. The instant invention specifically claims only hydrogen at the 4-position as substitution at the 4-position brings undesirable consequences for the use of these compounds in many applications. The compound f is the closest to the instant invention, but it is substituted by a 4-methyl group.
Substitution of the phenyl ring by an electron donating group at the 5-position diminishes photostability in coatings. Pickett et al. report the same loss of durability for such compounds in thermoplastics. The electron donating characteristics of methyl are less pronounced, but are still similar to alkoxy. The 6P value, as measure of the electronic effect of substituents for aromatic methoxy substitution is -0.27 while for methyl is -0.17 (March J.
"Advanced Organic Chemistry", 2nd Ed. (1977), McGraw-Hill, New York, p 253).
While the generic disclosure of the Japanese reference overlaps formula I of the instant application no such compound is specifically disclosed in the Japanese reference. As mentioned above, all examples of the Japanese reference are substituted at the 4-position of the phenyl ring, most contain the electron withdrawing CF3 group at the 4-position.
Compounds of the instant invention explicitly denote hydrogen at the 4-position of the phenyl ring for reasons including color and stability, and expressly designate the 5-position of the benzo ring as the location of the perfluoroalkyl moiety for reasons of stability and spectral coverage.
United States Patent Nos. 3,936,305; 4,681,905; 4,684,679; 4,684,680 and 5,108,835 teach the 2,2'-methylene-bis[4-hydrocarbyl-6-(benzotriazol-2-yl)phenols] having high molar activities and low volatility. In addition Unites States Patent Nos. 5,292,890 and 5,360,850 teach that asymmetrical bis-benzotriazoles display higher solubility in organic non-polar solvents that the symmetrical dimers made from the same benzotriazole monomer.
United States Patent No. 5,166,366 describes a process for making 2,2'-methylene-bis(6-(benzotriazol-2-yl)-4-hydrocarbylphenol] or 5,5'-methylene-bis(2-hydroxy-4-alkoxybenzo-phenone) using bis(dialkylamino)methane.
Related bis-benzotriazoles of the instant invention substituted at one or at both of the benzotriazole rings by perfluoroalkyl are unknown and provide the same improvement to these bis-benzotriazoles as mentioned above, namely enhanced durability and broader spectral coverage. Substitution of only one of the benzotriazole moieties in these bis-benzotriazoles by perfluoroalkyl gives the additional advantage of much lower color than the 7_ disubstituted compound, indeed nearly to the color of the bis-benzotriazole not substituted by perfluoroalkyl.
The instant invention pertains to novel benzotriazole UV absorbers having enhanced stability and durability and a low loss rate when incorporated into automotive coatings.
These new benzotriazole UV absorbers are also soluble in a variety of substrates including thermoplastic polymers and often are essentially colorless even though absorbing in the 350-390 nm range.
More specifically, the instant invention pertains to new benzotriazole compounds of formula I, III or IV
G~ OH
/ ~N, / E~
N (I) \ ~N \ I
G OH
' / ~N, / E~ (III) \ ~NN
G \
z (CH2 NCO-E
n OH OH
/ N N \
\ ~N N \ I L \ I N N, / G (IV) E2 E2, wherein G, is hydrogen or chloro, GZ is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, G6 is perfluoroalkyl of 1 to 12 carbon atoms, G, is hydrogen or perfluoroalkyl of 1 to 12 carbon atoms, _g-E, is hydrogen, straight or branched chain alkyl of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 24 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 4 alkyl of 1 to 4 carbon atoms; or E, is alkyl of 1 to 24 carbon atoms substituted by one or two hydroxy groups, E2 and E2' are independently straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by one to three alkyl of 1 to 4 carbon atoms; or E2 and E2' are independently said alkyl of 1 to 24 carbon atoms or said alkenyl of 2 to 18 carbon atoms substituted by one or more -OH, -OCOE", -OE4, -NCO, -NHz, -NHCOE", -NHE4 or -N(E4)2, or mixtures thereof, where E4 is straight or branched chain alkyl of 1 to 24 carbon atoms; or said alkyl or said alkenyl interrupted by one or more -O-, -NH- or -NE4- groups or mixtures thereof and which can be unsubstituted or substituted by one or more -OH, -OE4 or -NH2 groups or mixtures thereof;
n is 1 or 2, when n is 1, ES is OE6 or NE~EB, or ES is -PO(OE,2)2, -OSi(E")3 or -OCO-E", or straight or branched chain C,-C24alkyl which is interrupted by -O-, -S- or -NE" and which can be unsubstituted or substituted by -OH or -OCO-E", C5-C,2 cycloalkyl which is unsubstituted or substituted by -OH, straight chain or branched C2-C,Balkenyl which is unsubstituted or substituted by -OH, C,-C,Saralkyl, -CH2-CHOH-E,3 or glycidyl, E6 is hydrogen, straight or branched chain C,-C24alkyl which is unsubstituted or substituted by one or more OH, OE4 or NH2 groups, or -OE6 is -(OCH2CH2)WOH or -(OCH2CH2)WOE2,where w is 1 to 12 and E2, is alkyl of 1 to 12 carbon atoms, E, and Ee are independently hydrogen, alkyl of 1 to 18 carbon atoms, straight or branched chain C3-C,ealkyl which is interrupted by -O-, -S- or -NE"-, C5-C,2cycloalkyl, C6-C,4aryl or C,-C3hydroxylalkyl, or E~ and EB together with the N atom are a pyrrolidine, piperidine, piperazine or morpholine ring, E5 is -X-(Z)p-Y-E,5 wherein X is -O- or -N(E,6)-, Y is -O- or -N(E»)-, Z is C2-C,z-alkylene, C4-C,2-alkylene interrupted by one to three nitrogen atoms, oxygen atoms or a mixture thereof, or is C3-C,2-alkylene, butenylene, butynylene, cyclohexylene or phenylene, each substituted by a hydroxyl group, m is zero, 1 or 2, p is 1, or p is also zero when X and Y are -N(E,6)- and -N(E»)-, respectively, E~5 is a group -CO-C(E,8)=C(H)E~9 or, when Y is -N(E~~)-, forms together with E~, a group -CO-CH=CH-CO-, wherein E,8 is hydrogen or methyl, and E,9 is hydrogen, methyl or -CO-X-E2o, wherein E2o is hydrogen, C1-C~2-alkyl or a group of the formula G OH
/ ~N, / E~
N
G \ ~N \
z (CH2)nCO~ X-(Z)p wherein the symbols E,, G2, X, Z, m and p have the meanings defined above, and E,6 and E" independently of one another are hydrogen, C,-C,2-alkyl, C3-C,2-alkyl interrupted by 1 to 3 oxygen atoms, or is cyclohexyl or C,-C,Saralkyl, and E,6 together with E" in the case where Z is ethylene, also forms ethylene, when n is 2, ES is one of divalent radicals -O-E9-O- or -N(E")-E,o-N(E")- , E9 is C2-Csalkylene, C4-Caalkenylene, C4-Cealkynylene, cyclohexylene, straight or branched chain C4-C,oalkylene which is interrupted by -O- or by -CH2-CHOH-CH2-O-E,4-O-CH2-CHOH-CH2-, E,o being straight or branched chain C2-C,2alkylene which may be interrupted by -O-, cyclohexylene, or \ / ~. \ /
~r~-~
or or E,o and E"with the two nitrogen atoms form a piperazine ring, E,4 is straight or branched chain C2-CBalkylene, straight or branched chain CQ-C,oalkylene which is interrupted by -O-, cycloalkylene, arylene or or H H
where E, and E8 are independently hydrogen, alkyl of 1 to 18 carbon atoms or E, and E$
together are alkylene of 4 to 6 carbon atoms, 3-oxapentamethylene, 3-iminopentamethylene or 3-methyliminopentamethylene, E" is hydrogen, straight or branched chain C,-C,Balkyl, C5-C,2cycloalkyl, straight or branched chain C2-C,Balkenyl, C6-C,4aryl or C,-C,Saralkyl, E,2 is straight or branched chain C,-C,Salkyl, straight or branched chain C3-C,Balkenyl, C5-C,ocycloalkyl, C6-C,saryl or C,-C,Saralkyl, E,3 is H, straight chain or branched C,-C,salkyl which is substituted by -PO(OR,2)z, phenyl which is unsubstituted or substituted by OH, C,-C,Saralkyl or -CH20E,2, L is alkylene of 1 to 12 carbon atoms, alkylidene of 2 to 12 carbon atoms, benzylidene, p-xylylene, a,a,a',a'-tetramethyl-m-xylylene or cycloalkylidene, and with the proviso that in formula (I) G2 is not CF3 if E, is phenyl and E2 is tert.-octyl, or if E, is a-cumyl and E2 is a-cumyl tert.-butyl, tert.-octyl, nonyl or dodecyl, or if E, is hydrogen and is tert.-octyl or methyl; and G2 is not fluoro if EZ is tert. octyl and E, is phenyl or a-cumyl, and with the proviso that in formula IV
when G6 and G, are CF3, E2 and E2' are not the same.
Preferably the new benzotriazole is a compound of formula I
G OH
E, N (I) G \ ~N \
z wherein G, is hydrogen, G2 is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, E, is hydrogen or straight or branched alkyl of 4 to 24 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 4 alkyl of 1 to 4 carbon atoms, E2 is straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 3 alkyl of 1 to 4 carbon atoms; or E2 is said alkyl of 1 to 24 carbon atoms or said alkenyl of 2 to 18 carbon atoms substituted by one or more -OH, -OCOE", -OE4, -NCO, -NH2, -NHCOE", -NHE4 or -N(E4)2, or mixtures thereof, where E4 is straight or branched chain alkyl of 1 to 24 carbon atoms; or said alkyl or said alkenyl interrupted by one or more -O-, -NH- or -NE4- groups or mixtures thereof and which can be unsubstituted or substituted by one or more -OH, -OE4 or -NH2 groups or mixtures thereof;
E" is hydrogen, straight or branched chain C,-C,8alkyl, CS-C,2cycloalkyl, straight or branched chain C2-C,ealkenyl, C6-C,4aryl or C,-C,Saralkyl.
More preferably the new benzotriazole is a compound of formula I
G~ / N OH E
~ (I) \ ~N N
G2 \
wherein G, is hydrogen, G2 is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, E, is is hydrogen, straight or branched alkyl of 4 to 24 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 4 alkyl of 1 to 4 carbon atoms, E2 is straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 3 alkyl of 1 to 4 carbon atoms; or E2 is said alkyl of 1 to 24 carbon atoms or said alkenyl of 2 to 18 carbon atoms substituted by one or more -OH, -OCOE", -NH2 or -NHCOE", or mixtures thereof, or said alkyl or said alkenyl interrupted by one or more -O-and which can be unsubstituted or substituted by one or more -OH.
Also preferred is a compound of formula IIIA
G N OH
E' (IIIA) G2 'N \
n wherein G, is hydrogen, G2 is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, E, is hydrogen, straight or branched alkyl of 4 to 24 carbon atoms or phenylalkyl of 7 to 15 carbon atoms, E5 is -OE6 or -NE,Ee, or E5 is -X-(Z)P-Y-E15 wherein X is -O- or -N(E,6)-, Y is -O- or -N(E")-, Z is C2-C,2-alkylene, C4-C,z-alkylene interrupted by one to three nitrogen atoms, oxygen atoms or a mixture thereof, or is C3-C,2-alkylene, butenylene, butynylene, cyclohexylene or phenylene, each substituted by a hydroxyl group, m is 0, 1, 2 or 3, p is 1, or p is also zero when X and Y are -N(E,6)- and -N(E")-, respectively, E,5 is a group -CO-C(E,$)=C(H)E,9 or, when Y is -N(E")-, forms together with E" a group -CO-CH=CH-CO-, wherein E,8 is hydrogen or methyl, and E,9 is hydrogen, methyl or -CO-X-Ezo, wherein E2o is hydrogen, C,-C,z-alkyl or a group of the formula G OH
' / ~N, E~
N /
G \ ~N \
z (CH2)nC0-X-(Z)p and the other substituents have the meanings as defined above.
More preferred is a compound of formula IIIA
G~ / N OH E
I ' (IIIA) G2 N \
n wherein G, is hydrogen, G2 is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, E, is hydrogen, straight or branched alkyl of 4 to 24 carbon atoms or phenylalkyl of 7 to 15 carbon atoms, ES is -OE6 or -NE~Ee where E6 is hydrogen, straight or branched chain C,-C24alkyl which is unsubstituted or substituted by one or more OH groups, or -OE6 is -(OCH2CH2)WOH or -(OCH2CH2)",OE2lwhere w is 1 to 12 and E2, is alkyl of 1 to 12 carbon atoms, and E, and E$ are independently hydrogen, alkyl of 1 to 18 carbon atoms, straight or branched chain C3-C,Balkyl which is interrupted by -O-, -S- or -NE"-, C5-C,2cycloalkyl, C6-C,4aryl or C,-C3hydroxylalkyl, or E, and E8 together with the N atom are a pyrrolidine, piperidine, piperazine or morpholine ring and the other substituents have the meaning as defined above.
Still a preferred compound is of formula IV
OH OH
/ N N \
\ ~N N \ I L \ I N N, / G (IV) E2 E2' wherein Gs is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, G, is hydrogen or CF3, E2 and E2' are independently straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 3 alkyl of 1 to 4 carbon atoms; and L is alkylene of 1 to 12 carbon atoms, alkylidene of 2 to 12 carbon atoms, benzylidene, p-xylylene, a,a,a',a'-tetramethyl-m-xylylene or cycloalkylidene.
More preferred is a compound of formula IV
OH OH
/ / ,N~ \
L \ I N,N~ / G7 (IV) s E2 E2' wherein Gs is CF3, G, is hydrogen or CF3, E2 and E2' are independently straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 3 alkyl of 1 to 4 carbon atoms; and L is methylene.
A particularly preferred subgroup of compound is wherein G2 is -CF3 or F, Gs is -CF3 and G, is hydrogen.
Also preferred compounds are those in which one of X and Y is -O-; and particularly those in which both X and Y are -O-.
Compounds which are especially preferred are:
(c) 5-trifluoromethyl-2-(2-hydroxy-3,5-di-tert-octylphenyl)-2H-benzotriazole;
(d) 2,2'-methylene-bis[6-(5-pentafluoroethyl-2H-benzotriazol-2-yl)-4-tert-octylphenol];
(e) methylene-2-[4-tert-octyl-6-(2H-benzotriazol-2-yl)phenol]2'-[4-tert-octyl-6-(5-trifluoro-methyl-2H-benzotriazol-2-yl)phenol];
(f) 3-(5-trifluoromethyl-2H-benzotriazol-2- yl)-5-tert-butyl-4-hydroxyhydrocinnamic acid;
(g) methyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate;
(h) isooctyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate;
(i) 5-trifluoromethyl-2-[2-hydroxy-5-(3-hydroxypropyl)phenyl]-2H-benzotriazole;
Q) 5-trifluoromethyl-2-[2-hydroxy-5-(3-acryloyloxypropyl)phenyl]-2H-benzotriazole;
(k) 5-trifluoromethyl-2-[2-hydroxy-5-(3-methacryloyloxypropyl)phenyl]-2H-benzotriazole;
(I) 5-trifluoromethyl-2-[2-hydroxy-5-(3-acrylylaminopropyl)phenyl]-2H-benzotriazole;
(m) 5-trifluoromethyl-2-[2-hydroxy-5-(3-methacrylylaminopropyl)phenyl]-2H-benzotriazole;
(p) 5-trifluoromethyl-2-(2-hydroxy-3-a-cumyl-5-(2-hydroxyethyl)phenyl]-2H-benzotriazole;
(q) 5-trifluoromethyl-2-[2-hydroxy-3-a-cumyl-5-(3-hydroxypropyl)phenyl]-2H-benzotriazole;
(r) 5-trifluoromethyl-2-(2-hydroxy-3,5-ditert-amylphenyl)-2H-benzotriazole;
(s) 5-trifluoromethyl-2-(2-hydroxy-3,5-ditert-butylphenyl)-2H-benzotriazole;
(t) 5-trifluoromethyl-2-(2-hydroxy-3-dodecyl-5-methylphenyl)-2H-benzotriazole;
(u) 5-trifluoromethyl-2-[2-hydroxy-3-tert-butyl-5-(3-hydroxypropyl)phenyl)-2H-benzotriazole;
(v) 5-trifluoromethyl-2-[2-hydroxy-3-tert-butyl-5-(2-hydroxyethyl)phenyl]-2H-benzotriazole;
(w) 5-trifluoromethyl-2-[2-hydroxy-5-(2-hydroxyethyl)phenyl]-2H-benzotriazole;
(x) 5-fluoro-2-(2-hydroxy-3,5-di-a-cumylphenyl)-2H-benzotriazole;
(y) 5-trifluoromethyl-2-[2-hydroxy-5-(3-hydroxypropyl)phenyl]-2H-benzotriazole;
(z) 5-trifluoromethyl-2-[2-hydroxy-5-(3-propionyloxypropyl)phenyl]-2H-benzotriazole;
(aa) 5-pentafluoroethyl-2-(2-hydroxy-5-tert-butylphenyl)-2H-benzotriazole; or (bb) methylene-2-[4-tert-octyl-6-(2H-benzotriazol-2-yl)-2'-(4-tert-butyl-6-(5-trifluoromethyl-2H-benzotriazol-2-yl)phenolJ.
Examples of the various radicals are as follow:
When any of E, to E2, is alkyl, such groups are, for example, methyl, ethyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, tert-amyl, 2-ethylhexyl, tert-octyl, lauryl, tert-dodecyl, tridecyl, n-hexadecyl, n-octadecyl and eicosyl; when any of said radicals is alkenyl, such groups are, for example, allyl or oleyl; when any of said radicals is cycloalkyl, such groups are, for example, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl and cyclododecyl; when any of said radicals are phenylalkyl, such groups are, for example, benzyl, phenethyl, a-methylbenzyl and a,a-dimethylbenzyl; and when any of said radicals is aryl, they are, for example, phenyl, naphthyl, or when substituted by alkyl are, for example, tolyl and xylyl. When E6 is alkyl substituted by one or more -O- groups and/or substituted by one or more -OH, the -OE6 moiety can be -(OCH2CH2)",OH or -(OCH2CH2)WOE2, where w is 1 to 12 and E2, is alkyl of 1 to 12 carbon atoms, for example.
When E is alkylene, it is, for example, ethylene, tetramethylene, hexamethylene, 2-methyl-1,4-tetramethylene, hexamethylene, octamethylene, decamethylene and dodecamethylene;
when E is cycloalkylene, it is, for example, cyclopentylene, cyclohexylene, cycloheptylene, cyclooctylene and cyclododecylene; and when E is alkylene interrupted or terminated by cyclohexylene, it is , for example, the saturated diyl radical derived from limonene, herein called dihydrolimonenediyl.
When E is alkylene, it is, for example, ethylene, tetramethylene, hexamethylene, 2-methyl-1,4-tetramethylene, hexamethylene, octamethylene, decamethylene and dodecamethylene;
when E is cycloalkylene, it is, for example, cyclopentylene, cyclohexylene, cycloheptylene, cyclooctylene and cyclododecylene; and when E is alkylene interrupted or terminated by cyclohexylene, it is, for example, the saturated diyl radical derived from limonene, herein called dihydrolimonenediyl.
When the instant compounds contain a free carboxyl moiety where E2 is -where E6 is hydrogen, the alkali metal or amine salts of said acids are also contemplated as part of this invention allowing such UV absorbers to be used in aqueous systems due to the enhanced water solubility of such instant compounds.
E6, E, and EB can be the following C3-C,ealkyl radicals which are interrupted by -O-, -S-, or -NE"- and can be substituted by OH: methoxyethyl, ethoxyethyl, butoxyethyl, butoxypropyl, methylthioethyl, CH30CHzCH20CH2CH2-, CH3CH20CH2CH20CH2CHZ-, C4H90CH2CH20CH2CH2-, ethylthiopropyl, octylthiopropyl, dodecyloxypropyl, 2-hydroxyethyl, 2-hydroxypropyl, 4-hydroxybutyl, 6-hydroxyhexyl, -CI~CH2-NH-C4H9, -CH2CH2CHzNH-C$H"
and -CH2CH2CH2-N(CH3)-CH2CH(CZHS)C4H9, E6, E,, E8, E" and E,2 can be the following C5-C,2cycloalkyl radicals:
cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl or cyclodecyl. In the case of E6, the radical can also be substituted by -OH.
E,, EB and E" can be the following alkenyl radicals: allyl, methallyl, 2-n-hexenyl or 4-n-octenyl.
When E6 is alkenyl, it can have the same meaning as E,, EB and E" as alkenyl radicals, but it can also be -CH=CH2, n-undec-10-enyl or n-octadec-9-enyl, and it is also possible for the radical E6 to be substituted by -OH.
E, and Ea can be the following C,-C,Saralkyl radicals: benzyl, a-phenethyl, 2-phenethyl or 4-tert-butylbenzyl.
When E", E,3 or E,2 are aralkyl, they can, independently of one another, have the same meaning as E, or Ee.
Independently of one another, E,, Ee and E" can be the following C6-C~4 aryl radicals:
phenyl, a-naphthyl or ~i-naphthyl.
When E, and E$ are C,-C3 hydroxyalkyl, they can be the following radicals:
hydroxymethyl, 2-hydroxyethyl or 2-hydroxypropyl.
As C2-C8 alkylene, E9 and E,4 can be the following radicals: ethylene, propylene, butylene, hexylene or octylene.
As alkylene, E,o can be the same radicals, but can, in addition, also be higher-molecular groups such as decylene or dodecylene.
When E9 is a C4-Cealkenylene radical, the following is an example of a suitable group:
butenylene.
In the case of E9 and E,4, suitable straight or branched chain C4-C,oalkylene groups which are interrupted by -O- are the following groups: -CH2CH20CH2CH2-, -CH(CH3)-CH2-O-CH2-, -CH(CH3)-CH2CH20CH2CH20CH2CH2- and -CH2CH20CH2CH20CH2CH20CH2CH2-.
When E,4 is a cycloalkylene radical, the following groups are embraced: 1,3-cyclohexylene and 1,4-cyclohexylene.
When E,4 is arylene, this can be, specifically, the following groups: 1,3-phenylene or 1,4-phenylene.
_ lg _ As C2-C,2-alkylene, Z is a straight or branched chain. It is for example:
ethylene, propylene, tetramethylene, hexamethylene, octamethylene, dodecamethylene, 1,1-ethylidene, 2,2-propylidene, 2,2-amylidene or 2-ethylhexamethylene. C2-C6-alkylene groups are preferred.
When Z is C4-C,2-alkylene which is interrupted by oxygen, it is for example: -CH-2-CH2-, -CH2-CH2-O-CH2-CH2-CH2-, -CH2-CH2-O-CH2-CH2-O-CH2-CH2- or -CH2-CH2-O
CH2-CH2-O-CH2-CH2-O-CH2-CH2-, and, when alkylene is interrupted by nitrogen, a group N(E,6)- is meant, where E,6 is as defined in the foregoing, for example -CH2-CH2-CH2-CH2, -CH2-CH2-CH2-NH-(CH2)e- or -CH2CH2-CH2-N(CH3)-CH2-CH(C2H5)(CHZ)4-.
As C3-C,2-alkylene substituted by a hydroxyl group, Z is 2-hydroxytetramethylene, 2-hydroxyhexamethylene and, in particular, 2-hydroxytrimethylene.
As cyclohexylene, Z is for example 1,4-cyclohexylene and, in particular, 1,2-cyclohexylene.
As phenylene, Z is for example m-phenylene or p-phenylene.
m can be zero, 1, 2 or 3, but it is preferably 2.
p is preferably 1, but can also be zero if both X and Y are bound by way of nitrogen.
As C,-Ce-alkyl, E, is for example: methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, n-pentyl, tert-amyl, n-nexyl, n-heptyl, n-octyl, 2-ethylhexyl or tert-octyl. Tert-butyl is preferred.
As C,-C,2-alkyl, E,6, E1, and E2o can have the same meaning as that given in the foregoing for E,, and can additionally be straight or branched-chain nonyl, decyl, undecyl, or dodecyl.
When E,6 and E" are alkyl interrupted by oxygen atoms, the examples which apply are the same as those described in the foregoing for Z.
Examples for E,6 and E" as aralkyl are: benzyl, a-methylbenzyl, 1-phenylethyl, a,a-dimethylbenzyl or 1-phenylpropyl.
If Z is ethylene, E,6 and E" together can likewise form ethylene, which is equivalent to a bridging over by way of a piperazine group.
_19_ When Y is a group -N(E")-, E,5 and Ei~ together make up a group -CO-CH=CH-CO-, and O
thus form the substituent N ~ the group -X-(Z)P .
O
The preferred meaning of E,5 is, however, -CO-C(E,8)=CHE,4, E,8 and E,9 are preferably methyl and especially hydrogen.
Ez is -CH2-CH2-O-CO-C(G)=CH2 and G is hydrogen or methyl.
The instant invention also pertains to a composition stabilized against thermal, oxidative or light-induced degradation which comprises, (a) an organic material subject to thermal, oxidative or light-induced degradation, and (b) an effective stabilizing amount of a compound of formula I, III or IV.
Preferably, the organic material is a natural, semi-synthetic or synthetic polymer, especially a thermoplastic polymer.
Most preferably, the polymer is a polyolefin or polycarbonate, especially polyethylene or polypropylene; most especially polypropylene; or the polymer is a styrenic, ABS, a nylon, a polyarylamide, a polyester such as polyethylene terephthalate) or poly(butylene terephthalate), a polyurethane, a poly(ether sulfone), a polyacrylate, a rubber modified styrenic, polyvinyl chloride), polyvinyl butyral), polyacetal (polyoxymethylene), polyethylene naphthalenedicarboxylate), or other blends or copolymers such as poly(ethylene/1,4-cyclo-hexylenedimethylene terephthalate) PETG or an ionomer.
If the polymer is a polyester polyethylene terephthalate) PET, poly(butylene terephthalate) PBT or polyethylene 2,6-naphthalenedicarboxylate) PEN are particularly preferred.
In another preferred embodiment of the instant invention, the organic material is a coating resin selected from the group consisting of a thermoset acrylic melamine resin, an acrylic urethane resin, an epoxy carboxy resin, a silane modified acrylic melamine, an acrylic resin with carbamate pendant groups crosslinked with melamine or an acrylic polyol resin crosslinked with melamine containing carbamate groups.
Most preferably, the resin is a thermoset acrylic melamine resin or an acrylic urethane resin.
In yet another preferred embodiment of the instant invention, the organic material is a recording material.
The recording materials according to the invention are suitable for pressure-sensitive copying systems, photocopying systems using microcapsules, heat-sensitive copying systems, photographic materials and ink jet printing.
The recording materials according to the invention are distinguished by an unexpected improvement in quality, especially with regard to the fastness to light.
The recording materials according to the invention have the construction known for the particular use. They consist of a customary carrier, for example, paper or plastic film, which has been coated with one or more layers. Depending on the type of material, these layers contain the appropriate necessary components, in the case of photographic materials, for example, silver halide emulsions, dye couplers, dyes and the like. Material particularly suitable for ink jet printing has a layer particularly absorptive for ink on a customary carrier.
Uncoated paper can also be employed for ink jet printing. In this case the paper acts at the same time as the carrier material and as the ink-absorbent layer. Suitable material for ink jet printing is, for example, described in United States Patent No. 5,073,448 which is incorporated herein by reference.
The recording material can also be transparent as, for example, in the case of projection films.
The compounds of formula I, III or IV can be incorporated into the carder material as early as the production of the latter, in the production of paper, for example, being added to the paper pulp. A second method of application is to spray the carder material with an aqueous solution of compounds of formula I, II, I II or IV or to add the compounds to the coating composition.
Coating compositions intended for transparent recording materials suitable for projection cannot contain any particles which scatter light, such as pigments and fillers.
The dye-binding coating composition can contain a number of other additives, for example, antioxidants, light stabilizers (including also UV absorbers which do not fall under the scope of the UV absorbers of this invention), viscosity improvers, fluorescent brighteners, biocides and/or antistatic agents.
The coating composition is usually prepared as follows: the water-soluble components, for example, the binder, are dissolved in water and stirred together; the solid components, for example, fillers and other additives already described, are dispersed in this aqueous medium; and disperison is advantageously carried out by means of devices, for example, ultrasonic systems, turbine stirrers, homogenizers, colloid mills, bead mills, sand mills, high-speed stirrers and the like. The compounds of formula I, III or IV can be easily incorporated into the coating composition.
The recording material according to this invention preferably contains 1 to 5000 mg/mz, in z particular 50-1200 mg/m , of a compound of formula I.
As already mentioned, the recording materials according to the invention embrace a wide field. The compounds of formula I, III or IV can, for example, be employed in pressure-sensitive copying systems. They can be introduced either into the paper in order to protect the microencapsulated dye precursors there from light, or into the binder of the developer layer in order to protect the dyes formed there.
Photocopying systems using light-sensitive microcapsules which are developed by means of pressure are described in United States Patent Nos. 4,416,966; 4,483,912;
4,352,200;
4,535,050; 4,535,463; 4,551,407; 4,562,137 and 4,608,330; and also in EP-A
139,479; EP-A
162,664; EP-A 164,931; EP-A 237,024; EP-A 237,025 and EP-A 260,129. In all these systems, the compounds can be put into the dye-receiving layer. The compounds can, however, also be put into the donor layer in order to protect the color formers from light.
Photographic materials which can be stabilized are photographic dyes and layers containing such dyes or precursors thereof, for example, photographic paper and films.
Suitable materials are, for example, described in United States Patent No. 5,364,749 which is incorporated herein by reference. The compounds of formula I, III or IV act here as a UV
filter against electrostatic flashes. In color photographic materials, couplers and dyes are also protected against photochemical decomposition.
The instant compounds can be used for all types of color photographic materials. For example, they can be employed for color paper, color reversal paper, direct-positive color material, color negative film, color positive film, color reversal film and the like. They are preferably used inter alia for photographic color material which contains a reversal substrate or form positives.
Color-photographic recording materials usually contain, on a support, a blue-sensitive andlor a green-sensitive and/or a red-sensitive silver halide emulsion layer and, if desired, a protection layer, with the instant compounds being, preferably, either in the green-sensitive or the red-sensitive layer or in a layer between the green-sensitive and the red-sensitive layer or in a layer on top of the silver halide emulsion layers.
The compounds of formula I, III or IV can also be employed in recording materials based on the principles of photopolymerization, photoplasticization or the rupture of microcapsules, or in cases where heat-sensitive and light-sensitive diazonium salts, leuko dyes having an oxidizing agent or dye lactones having Lewis acids are used.
Furthermore, the instant compounds can be employed in recording materials for dye diffusion transfer printing, thermal wax transfer printing and non-matrix printing and for use with electrostatic, electrographic, electrophoretic, magnetographic and laser-electrophoto-graphic printers and pen-plotters. Of the above, recording materials for dye diffusion transfer printing are preferred, for example, as described in EP-A 507,734.
The instant compounds can also be employed in inks, preferably for ink jet printing, for example, as described in United States Patent No. 5,098,477 which is incorporated herein by reference.
The compounds of this invention exhibit superior hydrolytic stability, handling and storage stability as well as good resistance to extractability when present in a stabilized composition.
The methodology to make the instant compounds is described in the prior art.
The intermediates needed to make the instant compounds are largely items of commerce.
In general polymers which can be stabilized include 1. Polymers of monoolefins and diolefins, for example polypropylene, polyisobutylene, polybut-1-ene, poly-4-methylpent-1-ene, polyisoprene or polybutadiene, as well as polymers of cycloolefins, for instance of cyclopentene or norbornene, polyethylene (which optionally can be crosslinked), for example high density polyethylene (HDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), branched low density polyethylene (BLDPE).
Polyolefins, i.e. the polymers of monoolefins exemplified in the preceding paragraph, preferably polyethylene and polypropylene, can be prepared by different, and especially by the following, methods:
a) radical polymerisation (normally under high pressure and at elevated temperature).
b) catalytic polymerisation using a catalyst that normally contains one or more than one metal of groups IVb, Vb, Vlb or VIII of the Periodic Table. These metals usually have one or more than one ligand, typically oxides, halides, alcoholates, esters, ethers, amines, alkyls, alkenyls and/or aryls that may be either p- or s-coordinated. These metal complexes may be in the free form or fixed on substrates, typically on activated magnesium chloride, titanium(///) chloride, alumina or silicon oxide. These catalysts may be soluble or insoluble in the polymerisation medium. The catalysts can be used by themselves in the poly-merisation or further activators may be used, typically metal alkyls, metal hydrides, metal alkyl halides, metal alkyl oxides or metal alkyloxanes, said metals being elements of groups la, Ila and/or Illa of the Periodic Table. The activators may be modified conveniently with further ester, ether, amine or silyl ether groups. These catalyst systems are usually termed Phillips, Standard Oil Indiana, Ziegler (-Natta), TNZ (DuPont), metallocene or single site catalysts (SSC).
2. Mixtures of the polymers mentioned under 1 ), for example mixtures of polypropylene with polyisobutylene, polypropylene with polyethylene (for example PP/HDPE, PP/LDPE) and mixtures of different types of polyethylene (for example LDPE/HDPE).
3. Copolymers of monoolefins and diolefins with each other or with other vinyl monomers, for example ethylene/propylene copolymers, linear low density polyethylene (LLDPE) and mixtures thereof with low density polyethylene (LDPE), propylene/but-1-ene copolymers, propylene/isobutylene copolymers, ethylene/but-1-ene copolymers, ethylene/hexene copolymers, ethylene/methylpentene copolymers, ethylene/heptene copolymers, ethylene/octene copolymers, propylene/butadiene copolymers, isobutylene/isoprene copolymers, ethylene/alkyl acrylate copolymers, ethylene/alkyl methacrylate copolymers, ethylene/vinyl acetate copolymers and their copolymers with carbon monoxide or ethylene/acrylic acid copolymers and their salts (ionomers) as well as terpolymers of ethylene with propylene and a diene such as hexadiene, dicyclopentadiene or ethylidene-norbornene; and mixtures of such copolymers with one another and with polymers men-tioned in 1 ) above, for example polypropylene/ethylene-propylene copolymers, LDPE/ethylene-vinyl acetate copolymers (EVA), LDPE/ethylene-acrylic acid copolymers (EAA), LLDPE/EVA, LLDPEIEAA and alternating or random polyalkylene/carbon monoxide copolymers and mixtures thereof with other polymers, for example polyamides.
4. Hydrocarbon resins (for example CS-C9) including hydrogenated modifications thereof (e.g. tackifiers) and mixtures of polyalkylenes and starch.
5. Polystyrene, polyp-methylstyrene), poly(a-methylstyrene).
6. Copolymers of styrene or a-methylstyrene with dienes or acrylic derivatives, for example styrene/butadiene, styrene/acrylonitrile, styrene/alkyl methacrylate, styrenelbutadienelalkyl acrylate, styrene/butadienelalkyl methacrylate, styrene/maleic anhydride, styrene/-acrylonitrile/methyl acrylate; mixtures of high impact strength of styrene copolymers and another polymer, for example a polyacrylate, a diene polymer or an ethylene/propylene/diene terpolymer; and block copolymers of styrene such as styrene/butadiene/styrene, styrene/isoprene/styrene, styrene/ethylene/butylene/styrene or styrene/ethylene/propylene/
styrene.
7. Graft copolymers of styrene or a-methylstyrene, for example styrene on polybutadiene, styrene on polybutadiene-styrene or polybutadiene-acrylonitrile copolymers;
styrene and acrylonitrile (or methacrylonitrile) on polybutadiene; styrene, acrylonitrile and methyl meth-acrylate on polybutadiene; styrene and malefic anhydride on polybutadiene;
styrene, acrylo-nitrite and malefic anhydride or maleimide on polybutadiene; styrene and maleimide on poly-butadiene; styrene and alkyl acrylates or methacrylates on polybutadiene;
styrene and acrylonitrile on ethylene/propylene/diene terpolymers; styrene and acrylonitrile on polyalkyl acrylates or polyalkyl methacrylates, styrene and acrylonitrile on acrylatelbutadiene copoly-mers, as well as mixtures thereof with the copolymers listed under 6), for example the copolymer mixtures known as ABS, MBS, ASA or AES polymers.
Substitution of the phenyl ring by an electron donating group at the 5-position diminishes photostability in coatings. Pickett et al. report the same loss of durability for such compounds in thermoplastics. The electron donating characteristics of methyl are less pronounced, but are still similar to alkoxy. The 6P value, as measure of the electronic effect of substituents for aromatic methoxy substitution is -0.27 while for methyl is -0.17 (March J.
"Advanced Organic Chemistry", 2nd Ed. (1977), McGraw-Hill, New York, p 253).
While the generic disclosure of the Japanese reference overlaps formula I of the instant application no such compound is specifically disclosed in the Japanese reference. As mentioned above, all examples of the Japanese reference are substituted at the 4-position of the phenyl ring, most contain the electron withdrawing CF3 group at the 4-position.
Compounds of the instant invention explicitly denote hydrogen at the 4-position of the phenyl ring for reasons including color and stability, and expressly designate the 5-position of the benzo ring as the location of the perfluoroalkyl moiety for reasons of stability and spectral coverage.
United States Patent Nos. 3,936,305; 4,681,905; 4,684,679; 4,684,680 and 5,108,835 teach the 2,2'-methylene-bis[4-hydrocarbyl-6-(benzotriazol-2-yl)phenols] having high molar activities and low volatility. In addition Unites States Patent Nos. 5,292,890 and 5,360,850 teach that asymmetrical bis-benzotriazoles display higher solubility in organic non-polar solvents that the symmetrical dimers made from the same benzotriazole monomer.
United States Patent No. 5,166,366 describes a process for making 2,2'-methylene-bis(6-(benzotriazol-2-yl)-4-hydrocarbylphenol] or 5,5'-methylene-bis(2-hydroxy-4-alkoxybenzo-phenone) using bis(dialkylamino)methane.
Related bis-benzotriazoles of the instant invention substituted at one or at both of the benzotriazole rings by perfluoroalkyl are unknown and provide the same improvement to these bis-benzotriazoles as mentioned above, namely enhanced durability and broader spectral coverage. Substitution of only one of the benzotriazole moieties in these bis-benzotriazoles by perfluoroalkyl gives the additional advantage of much lower color than the 7_ disubstituted compound, indeed nearly to the color of the bis-benzotriazole not substituted by perfluoroalkyl.
The instant invention pertains to novel benzotriazole UV absorbers having enhanced stability and durability and a low loss rate when incorporated into automotive coatings.
These new benzotriazole UV absorbers are also soluble in a variety of substrates including thermoplastic polymers and often are essentially colorless even though absorbing in the 350-390 nm range.
More specifically, the instant invention pertains to new benzotriazole compounds of formula I, III or IV
G~ OH
/ ~N, / E~
N (I) \ ~N \ I
G OH
' / ~N, / E~ (III) \ ~NN
G \
z (CH2 NCO-E
n OH OH
/ N N \
\ ~N N \ I L \ I N N, / G (IV) E2 E2, wherein G, is hydrogen or chloro, GZ is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, G6 is perfluoroalkyl of 1 to 12 carbon atoms, G, is hydrogen or perfluoroalkyl of 1 to 12 carbon atoms, _g-E, is hydrogen, straight or branched chain alkyl of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 24 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 4 alkyl of 1 to 4 carbon atoms; or E, is alkyl of 1 to 24 carbon atoms substituted by one or two hydroxy groups, E2 and E2' are independently straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by one to three alkyl of 1 to 4 carbon atoms; or E2 and E2' are independently said alkyl of 1 to 24 carbon atoms or said alkenyl of 2 to 18 carbon atoms substituted by one or more -OH, -OCOE", -OE4, -NCO, -NHz, -NHCOE", -NHE4 or -N(E4)2, or mixtures thereof, where E4 is straight or branched chain alkyl of 1 to 24 carbon atoms; or said alkyl or said alkenyl interrupted by one or more -O-, -NH- or -NE4- groups or mixtures thereof and which can be unsubstituted or substituted by one or more -OH, -OE4 or -NH2 groups or mixtures thereof;
n is 1 or 2, when n is 1, ES is OE6 or NE~EB, or ES is -PO(OE,2)2, -OSi(E")3 or -OCO-E", or straight or branched chain C,-C24alkyl which is interrupted by -O-, -S- or -NE" and which can be unsubstituted or substituted by -OH or -OCO-E", C5-C,2 cycloalkyl which is unsubstituted or substituted by -OH, straight chain or branched C2-C,Balkenyl which is unsubstituted or substituted by -OH, C,-C,Saralkyl, -CH2-CHOH-E,3 or glycidyl, E6 is hydrogen, straight or branched chain C,-C24alkyl which is unsubstituted or substituted by one or more OH, OE4 or NH2 groups, or -OE6 is -(OCH2CH2)WOH or -(OCH2CH2)WOE2,where w is 1 to 12 and E2, is alkyl of 1 to 12 carbon atoms, E, and Ee are independently hydrogen, alkyl of 1 to 18 carbon atoms, straight or branched chain C3-C,ealkyl which is interrupted by -O-, -S- or -NE"-, C5-C,2cycloalkyl, C6-C,4aryl or C,-C3hydroxylalkyl, or E~ and EB together with the N atom are a pyrrolidine, piperidine, piperazine or morpholine ring, E5 is -X-(Z)p-Y-E,5 wherein X is -O- or -N(E,6)-, Y is -O- or -N(E»)-, Z is C2-C,z-alkylene, C4-C,2-alkylene interrupted by one to three nitrogen atoms, oxygen atoms or a mixture thereof, or is C3-C,2-alkylene, butenylene, butynylene, cyclohexylene or phenylene, each substituted by a hydroxyl group, m is zero, 1 or 2, p is 1, or p is also zero when X and Y are -N(E,6)- and -N(E»)-, respectively, E~5 is a group -CO-C(E,8)=C(H)E~9 or, when Y is -N(E~~)-, forms together with E~, a group -CO-CH=CH-CO-, wherein E,8 is hydrogen or methyl, and E,9 is hydrogen, methyl or -CO-X-E2o, wherein E2o is hydrogen, C1-C~2-alkyl or a group of the formula G OH
/ ~N, / E~
N
G \ ~N \
z (CH2)nCO~ X-(Z)p wherein the symbols E,, G2, X, Z, m and p have the meanings defined above, and E,6 and E" independently of one another are hydrogen, C,-C,2-alkyl, C3-C,2-alkyl interrupted by 1 to 3 oxygen atoms, or is cyclohexyl or C,-C,Saralkyl, and E,6 together with E" in the case where Z is ethylene, also forms ethylene, when n is 2, ES is one of divalent radicals -O-E9-O- or -N(E")-E,o-N(E")- , E9 is C2-Csalkylene, C4-Caalkenylene, C4-Cealkynylene, cyclohexylene, straight or branched chain C4-C,oalkylene which is interrupted by -O- or by -CH2-CHOH-CH2-O-E,4-O-CH2-CHOH-CH2-, E,o being straight or branched chain C2-C,2alkylene which may be interrupted by -O-, cyclohexylene, or \ / ~. \ /
~r~-~
or or E,o and E"with the two nitrogen atoms form a piperazine ring, E,4 is straight or branched chain C2-CBalkylene, straight or branched chain CQ-C,oalkylene which is interrupted by -O-, cycloalkylene, arylene or or H H
where E, and E8 are independently hydrogen, alkyl of 1 to 18 carbon atoms or E, and E$
together are alkylene of 4 to 6 carbon atoms, 3-oxapentamethylene, 3-iminopentamethylene or 3-methyliminopentamethylene, E" is hydrogen, straight or branched chain C,-C,Balkyl, C5-C,2cycloalkyl, straight or branched chain C2-C,Balkenyl, C6-C,4aryl or C,-C,Saralkyl, E,2 is straight or branched chain C,-C,Salkyl, straight or branched chain C3-C,Balkenyl, C5-C,ocycloalkyl, C6-C,saryl or C,-C,Saralkyl, E,3 is H, straight chain or branched C,-C,salkyl which is substituted by -PO(OR,2)z, phenyl which is unsubstituted or substituted by OH, C,-C,Saralkyl or -CH20E,2, L is alkylene of 1 to 12 carbon atoms, alkylidene of 2 to 12 carbon atoms, benzylidene, p-xylylene, a,a,a',a'-tetramethyl-m-xylylene or cycloalkylidene, and with the proviso that in formula (I) G2 is not CF3 if E, is phenyl and E2 is tert.-octyl, or if E, is a-cumyl and E2 is a-cumyl tert.-butyl, tert.-octyl, nonyl or dodecyl, or if E, is hydrogen and is tert.-octyl or methyl; and G2 is not fluoro if EZ is tert. octyl and E, is phenyl or a-cumyl, and with the proviso that in formula IV
when G6 and G, are CF3, E2 and E2' are not the same.
Preferably the new benzotriazole is a compound of formula I
G OH
E, N (I) G \ ~N \
z wherein G, is hydrogen, G2 is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, E, is hydrogen or straight or branched alkyl of 4 to 24 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 4 alkyl of 1 to 4 carbon atoms, E2 is straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 3 alkyl of 1 to 4 carbon atoms; or E2 is said alkyl of 1 to 24 carbon atoms or said alkenyl of 2 to 18 carbon atoms substituted by one or more -OH, -OCOE", -OE4, -NCO, -NH2, -NHCOE", -NHE4 or -N(E4)2, or mixtures thereof, where E4 is straight or branched chain alkyl of 1 to 24 carbon atoms; or said alkyl or said alkenyl interrupted by one or more -O-, -NH- or -NE4- groups or mixtures thereof and which can be unsubstituted or substituted by one or more -OH, -OE4 or -NH2 groups or mixtures thereof;
E" is hydrogen, straight or branched chain C,-C,8alkyl, CS-C,2cycloalkyl, straight or branched chain C2-C,ealkenyl, C6-C,4aryl or C,-C,Saralkyl.
More preferably the new benzotriazole is a compound of formula I
G~ / N OH E
~ (I) \ ~N N
G2 \
wherein G, is hydrogen, G2 is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, E, is is hydrogen, straight or branched alkyl of 4 to 24 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 4 alkyl of 1 to 4 carbon atoms, E2 is straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 3 alkyl of 1 to 4 carbon atoms; or E2 is said alkyl of 1 to 24 carbon atoms or said alkenyl of 2 to 18 carbon atoms substituted by one or more -OH, -OCOE", -NH2 or -NHCOE", or mixtures thereof, or said alkyl or said alkenyl interrupted by one or more -O-and which can be unsubstituted or substituted by one or more -OH.
Also preferred is a compound of formula IIIA
G N OH
E' (IIIA) G2 'N \
n wherein G, is hydrogen, G2 is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, E, is hydrogen, straight or branched alkyl of 4 to 24 carbon atoms or phenylalkyl of 7 to 15 carbon atoms, E5 is -OE6 or -NE,Ee, or E5 is -X-(Z)P-Y-E15 wherein X is -O- or -N(E,6)-, Y is -O- or -N(E")-, Z is C2-C,2-alkylene, C4-C,z-alkylene interrupted by one to three nitrogen atoms, oxygen atoms or a mixture thereof, or is C3-C,2-alkylene, butenylene, butynylene, cyclohexylene or phenylene, each substituted by a hydroxyl group, m is 0, 1, 2 or 3, p is 1, or p is also zero when X and Y are -N(E,6)- and -N(E")-, respectively, E,5 is a group -CO-C(E,$)=C(H)E,9 or, when Y is -N(E")-, forms together with E" a group -CO-CH=CH-CO-, wherein E,8 is hydrogen or methyl, and E,9 is hydrogen, methyl or -CO-X-Ezo, wherein E2o is hydrogen, C,-C,z-alkyl or a group of the formula G OH
' / ~N, E~
N /
G \ ~N \
z (CH2)nC0-X-(Z)p and the other substituents have the meanings as defined above.
More preferred is a compound of formula IIIA
G~ / N OH E
I ' (IIIA) G2 N \
n wherein G, is hydrogen, G2 is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, E, is hydrogen, straight or branched alkyl of 4 to 24 carbon atoms or phenylalkyl of 7 to 15 carbon atoms, ES is -OE6 or -NE~Ee where E6 is hydrogen, straight or branched chain C,-C24alkyl which is unsubstituted or substituted by one or more OH groups, or -OE6 is -(OCH2CH2)WOH or -(OCH2CH2)",OE2lwhere w is 1 to 12 and E2, is alkyl of 1 to 12 carbon atoms, and E, and E$ are independently hydrogen, alkyl of 1 to 18 carbon atoms, straight or branched chain C3-C,Balkyl which is interrupted by -O-, -S- or -NE"-, C5-C,2cycloalkyl, C6-C,4aryl or C,-C3hydroxylalkyl, or E, and E8 together with the N atom are a pyrrolidine, piperidine, piperazine or morpholine ring and the other substituents have the meaning as defined above.
Still a preferred compound is of formula IV
OH OH
/ N N \
\ ~N N \ I L \ I N N, / G (IV) E2 E2' wherein Gs is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, G, is hydrogen or CF3, E2 and E2' are independently straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 3 alkyl of 1 to 4 carbon atoms; and L is alkylene of 1 to 12 carbon atoms, alkylidene of 2 to 12 carbon atoms, benzylidene, p-xylylene, a,a,a',a'-tetramethyl-m-xylylene or cycloalkylidene.
More preferred is a compound of formula IV
OH OH
/ / ,N~ \
L \ I N,N~ / G7 (IV) s E2 E2' wherein Gs is CF3, G, is hydrogen or CF3, E2 and E2' are independently straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 3 alkyl of 1 to 4 carbon atoms; and L is methylene.
A particularly preferred subgroup of compound is wherein G2 is -CF3 or F, Gs is -CF3 and G, is hydrogen.
Also preferred compounds are those in which one of X and Y is -O-; and particularly those in which both X and Y are -O-.
Compounds which are especially preferred are:
(c) 5-trifluoromethyl-2-(2-hydroxy-3,5-di-tert-octylphenyl)-2H-benzotriazole;
(d) 2,2'-methylene-bis[6-(5-pentafluoroethyl-2H-benzotriazol-2-yl)-4-tert-octylphenol];
(e) methylene-2-[4-tert-octyl-6-(2H-benzotriazol-2-yl)phenol]2'-[4-tert-octyl-6-(5-trifluoro-methyl-2H-benzotriazol-2-yl)phenol];
(f) 3-(5-trifluoromethyl-2H-benzotriazol-2- yl)-5-tert-butyl-4-hydroxyhydrocinnamic acid;
(g) methyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate;
(h) isooctyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate;
(i) 5-trifluoromethyl-2-[2-hydroxy-5-(3-hydroxypropyl)phenyl]-2H-benzotriazole;
Q) 5-trifluoromethyl-2-[2-hydroxy-5-(3-acryloyloxypropyl)phenyl]-2H-benzotriazole;
(k) 5-trifluoromethyl-2-[2-hydroxy-5-(3-methacryloyloxypropyl)phenyl]-2H-benzotriazole;
(I) 5-trifluoromethyl-2-[2-hydroxy-5-(3-acrylylaminopropyl)phenyl]-2H-benzotriazole;
(m) 5-trifluoromethyl-2-[2-hydroxy-5-(3-methacrylylaminopropyl)phenyl]-2H-benzotriazole;
(p) 5-trifluoromethyl-2-(2-hydroxy-3-a-cumyl-5-(2-hydroxyethyl)phenyl]-2H-benzotriazole;
(q) 5-trifluoromethyl-2-[2-hydroxy-3-a-cumyl-5-(3-hydroxypropyl)phenyl]-2H-benzotriazole;
(r) 5-trifluoromethyl-2-(2-hydroxy-3,5-ditert-amylphenyl)-2H-benzotriazole;
(s) 5-trifluoromethyl-2-(2-hydroxy-3,5-ditert-butylphenyl)-2H-benzotriazole;
(t) 5-trifluoromethyl-2-(2-hydroxy-3-dodecyl-5-methylphenyl)-2H-benzotriazole;
(u) 5-trifluoromethyl-2-[2-hydroxy-3-tert-butyl-5-(3-hydroxypropyl)phenyl)-2H-benzotriazole;
(v) 5-trifluoromethyl-2-[2-hydroxy-3-tert-butyl-5-(2-hydroxyethyl)phenyl]-2H-benzotriazole;
(w) 5-trifluoromethyl-2-[2-hydroxy-5-(2-hydroxyethyl)phenyl]-2H-benzotriazole;
(x) 5-fluoro-2-(2-hydroxy-3,5-di-a-cumylphenyl)-2H-benzotriazole;
(y) 5-trifluoromethyl-2-[2-hydroxy-5-(3-hydroxypropyl)phenyl]-2H-benzotriazole;
(z) 5-trifluoromethyl-2-[2-hydroxy-5-(3-propionyloxypropyl)phenyl]-2H-benzotriazole;
(aa) 5-pentafluoroethyl-2-(2-hydroxy-5-tert-butylphenyl)-2H-benzotriazole; or (bb) methylene-2-[4-tert-octyl-6-(2H-benzotriazol-2-yl)-2'-(4-tert-butyl-6-(5-trifluoromethyl-2H-benzotriazol-2-yl)phenolJ.
Examples of the various radicals are as follow:
When any of E, to E2, is alkyl, such groups are, for example, methyl, ethyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, tert-amyl, 2-ethylhexyl, tert-octyl, lauryl, tert-dodecyl, tridecyl, n-hexadecyl, n-octadecyl and eicosyl; when any of said radicals is alkenyl, such groups are, for example, allyl or oleyl; when any of said radicals is cycloalkyl, such groups are, for example, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl and cyclododecyl; when any of said radicals are phenylalkyl, such groups are, for example, benzyl, phenethyl, a-methylbenzyl and a,a-dimethylbenzyl; and when any of said radicals is aryl, they are, for example, phenyl, naphthyl, or when substituted by alkyl are, for example, tolyl and xylyl. When E6 is alkyl substituted by one or more -O- groups and/or substituted by one or more -OH, the -OE6 moiety can be -(OCH2CH2)",OH or -(OCH2CH2)WOE2, where w is 1 to 12 and E2, is alkyl of 1 to 12 carbon atoms, for example.
When E is alkylene, it is, for example, ethylene, tetramethylene, hexamethylene, 2-methyl-1,4-tetramethylene, hexamethylene, octamethylene, decamethylene and dodecamethylene;
when E is cycloalkylene, it is, for example, cyclopentylene, cyclohexylene, cycloheptylene, cyclooctylene and cyclododecylene; and when E is alkylene interrupted or terminated by cyclohexylene, it is , for example, the saturated diyl radical derived from limonene, herein called dihydrolimonenediyl.
When E is alkylene, it is, for example, ethylene, tetramethylene, hexamethylene, 2-methyl-1,4-tetramethylene, hexamethylene, octamethylene, decamethylene and dodecamethylene;
when E is cycloalkylene, it is, for example, cyclopentylene, cyclohexylene, cycloheptylene, cyclooctylene and cyclododecylene; and when E is alkylene interrupted or terminated by cyclohexylene, it is, for example, the saturated diyl radical derived from limonene, herein called dihydrolimonenediyl.
When the instant compounds contain a free carboxyl moiety where E2 is -where E6 is hydrogen, the alkali metal or amine salts of said acids are also contemplated as part of this invention allowing such UV absorbers to be used in aqueous systems due to the enhanced water solubility of such instant compounds.
E6, E, and EB can be the following C3-C,ealkyl radicals which are interrupted by -O-, -S-, or -NE"- and can be substituted by OH: methoxyethyl, ethoxyethyl, butoxyethyl, butoxypropyl, methylthioethyl, CH30CHzCH20CH2CH2-, CH3CH20CH2CH20CH2CHZ-, C4H90CH2CH20CH2CH2-, ethylthiopropyl, octylthiopropyl, dodecyloxypropyl, 2-hydroxyethyl, 2-hydroxypropyl, 4-hydroxybutyl, 6-hydroxyhexyl, -CI~CH2-NH-C4H9, -CH2CH2CHzNH-C$H"
and -CH2CH2CH2-N(CH3)-CH2CH(CZHS)C4H9, E6, E,, E8, E" and E,2 can be the following C5-C,2cycloalkyl radicals:
cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl or cyclodecyl. In the case of E6, the radical can also be substituted by -OH.
E,, EB and E" can be the following alkenyl radicals: allyl, methallyl, 2-n-hexenyl or 4-n-octenyl.
When E6 is alkenyl, it can have the same meaning as E,, EB and E" as alkenyl radicals, but it can also be -CH=CH2, n-undec-10-enyl or n-octadec-9-enyl, and it is also possible for the radical E6 to be substituted by -OH.
E, and Ea can be the following C,-C,Saralkyl radicals: benzyl, a-phenethyl, 2-phenethyl or 4-tert-butylbenzyl.
When E", E,3 or E,2 are aralkyl, they can, independently of one another, have the same meaning as E, or Ee.
Independently of one another, E,, Ee and E" can be the following C6-C~4 aryl radicals:
phenyl, a-naphthyl or ~i-naphthyl.
When E, and E$ are C,-C3 hydroxyalkyl, they can be the following radicals:
hydroxymethyl, 2-hydroxyethyl or 2-hydroxypropyl.
As C2-C8 alkylene, E9 and E,4 can be the following radicals: ethylene, propylene, butylene, hexylene or octylene.
As alkylene, E,o can be the same radicals, but can, in addition, also be higher-molecular groups such as decylene or dodecylene.
When E9 is a C4-Cealkenylene radical, the following is an example of a suitable group:
butenylene.
In the case of E9 and E,4, suitable straight or branched chain C4-C,oalkylene groups which are interrupted by -O- are the following groups: -CH2CH20CH2CH2-, -CH(CH3)-CH2-O-CH2-, -CH(CH3)-CH2CH20CH2CH20CH2CH2- and -CH2CH20CH2CH20CH2CH20CH2CH2-.
When E,4 is a cycloalkylene radical, the following groups are embraced: 1,3-cyclohexylene and 1,4-cyclohexylene.
When E,4 is arylene, this can be, specifically, the following groups: 1,3-phenylene or 1,4-phenylene.
_ lg _ As C2-C,2-alkylene, Z is a straight or branched chain. It is for example:
ethylene, propylene, tetramethylene, hexamethylene, octamethylene, dodecamethylene, 1,1-ethylidene, 2,2-propylidene, 2,2-amylidene or 2-ethylhexamethylene. C2-C6-alkylene groups are preferred.
When Z is C4-C,2-alkylene which is interrupted by oxygen, it is for example: -CH-2-CH2-, -CH2-CH2-O-CH2-CH2-CH2-, -CH2-CH2-O-CH2-CH2-O-CH2-CH2- or -CH2-CH2-O
CH2-CH2-O-CH2-CH2-O-CH2-CH2-, and, when alkylene is interrupted by nitrogen, a group N(E,6)- is meant, where E,6 is as defined in the foregoing, for example -CH2-CH2-CH2-CH2, -CH2-CH2-CH2-NH-(CH2)e- or -CH2CH2-CH2-N(CH3)-CH2-CH(C2H5)(CHZ)4-.
As C3-C,2-alkylene substituted by a hydroxyl group, Z is 2-hydroxytetramethylene, 2-hydroxyhexamethylene and, in particular, 2-hydroxytrimethylene.
As cyclohexylene, Z is for example 1,4-cyclohexylene and, in particular, 1,2-cyclohexylene.
As phenylene, Z is for example m-phenylene or p-phenylene.
m can be zero, 1, 2 or 3, but it is preferably 2.
p is preferably 1, but can also be zero if both X and Y are bound by way of nitrogen.
As C,-Ce-alkyl, E, is for example: methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, n-pentyl, tert-amyl, n-nexyl, n-heptyl, n-octyl, 2-ethylhexyl or tert-octyl. Tert-butyl is preferred.
As C,-C,2-alkyl, E,6, E1, and E2o can have the same meaning as that given in the foregoing for E,, and can additionally be straight or branched-chain nonyl, decyl, undecyl, or dodecyl.
When E,6 and E" are alkyl interrupted by oxygen atoms, the examples which apply are the same as those described in the foregoing for Z.
Examples for E,6 and E" as aralkyl are: benzyl, a-methylbenzyl, 1-phenylethyl, a,a-dimethylbenzyl or 1-phenylpropyl.
If Z is ethylene, E,6 and E" together can likewise form ethylene, which is equivalent to a bridging over by way of a piperazine group.
_19_ When Y is a group -N(E")-, E,5 and Ei~ together make up a group -CO-CH=CH-CO-, and O
thus form the substituent N ~ the group -X-(Z)P .
O
The preferred meaning of E,5 is, however, -CO-C(E,8)=CHE,4, E,8 and E,9 are preferably methyl and especially hydrogen.
Ez is -CH2-CH2-O-CO-C(G)=CH2 and G is hydrogen or methyl.
The instant invention also pertains to a composition stabilized against thermal, oxidative or light-induced degradation which comprises, (a) an organic material subject to thermal, oxidative or light-induced degradation, and (b) an effective stabilizing amount of a compound of formula I, III or IV.
Preferably, the organic material is a natural, semi-synthetic or synthetic polymer, especially a thermoplastic polymer.
Most preferably, the polymer is a polyolefin or polycarbonate, especially polyethylene or polypropylene; most especially polypropylene; or the polymer is a styrenic, ABS, a nylon, a polyarylamide, a polyester such as polyethylene terephthalate) or poly(butylene terephthalate), a polyurethane, a poly(ether sulfone), a polyacrylate, a rubber modified styrenic, polyvinyl chloride), polyvinyl butyral), polyacetal (polyoxymethylene), polyethylene naphthalenedicarboxylate), or other blends or copolymers such as poly(ethylene/1,4-cyclo-hexylenedimethylene terephthalate) PETG or an ionomer.
If the polymer is a polyester polyethylene terephthalate) PET, poly(butylene terephthalate) PBT or polyethylene 2,6-naphthalenedicarboxylate) PEN are particularly preferred.
In another preferred embodiment of the instant invention, the organic material is a coating resin selected from the group consisting of a thermoset acrylic melamine resin, an acrylic urethane resin, an epoxy carboxy resin, a silane modified acrylic melamine, an acrylic resin with carbamate pendant groups crosslinked with melamine or an acrylic polyol resin crosslinked with melamine containing carbamate groups.
Most preferably, the resin is a thermoset acrylic melamine resin or an acrylic urethane resin.
In yet another preferred embodiment of the instant invention, the organic material is a recording material.
The recording materials according to the invention are suitable for pressure-sensitive copying systems, photocopying systems using microcapsules, heat-sensitive copying systems, photographic materials and ink jet printing.
The recording materials according to the invention are distinguished by an unexpected improvement in quality, especially with regard to the fastness to light.
The recording materials according to the invention have the construction known for the particular use. They consist of a customary carrier, for example, paper or plastic film, which has been coated with one or more layers. Depending on the type of material, these layers contain the appropriate necessary components, in the case of photographic materials, for example, silver halide emulsions, dye couplers, dyes and the like. Material particularly suitable for ink jet printing has a layer particularly absorptive for ink on a customary carrier.
Uncoated paper can also be employed for ink jet printing. In this case the paper acts at the same time as the carrier material and as the ink-absorbent layer. Suitable material for ink jet printing is, for example, described in United States Patent No. 5,073,448 which is incorporated herein by reference.
The recording material can also be transparent as, for example, in the case of projection films.
The compounds of formula I, III or IV can be incorporated into the carder material as early as the production of the latter, in the production of paper, for example, being added to the paper pulp. A second method of application is to spray the carder material with an aqueous solution of compounds of formula I, II, I II or IV or to add the compounds to the coating composition.
Coating compositions intended for transparent recording materials suitable for projection cannot contain any particles which scatter light, such as pigments and fillers.
The dye-binding coating composition can contain a number of other additives, for example, antioxidants, light stabilizers (including also UV absorbers which do not fall under the scope of the UV absorbers of this invention), viscosity improvers, fluorescent brighteners, biocides and/or antistatic agents.
The coating composition is usually prepared as follows: the water-soluble components, for example, the binder, are dissolved in water and stirred together; the solid components, for example, fillers and other additives already described, are dispersed in this aqueous medium; and disperison is advantageously carried out by means of devices, for example, ultrasonic systems, turbine stirrers, homogenizers, colloid mills, bead mills, sand mills, high-speed stirrers and the like. The compounds of formula I, III or IV can be easily incorporated into the coating composition.
The recording material according to this invention preferably contains 1 to 5000 mg/mz, in z particular 50-1200 mg/m , of a compound of formula I.
As already mentioned, the recording materials according to the invention embrace a wide field. The compounds of formula I, III or IV can, for example, be employed in pressure-sensitive copying systems. They can be introduced either into the paper in order to protect the microencapsulated dye precursors there from light, or into the binder of the developer layer in order to protect the dyes formed there.
Photocopying systems using light-sensitive microcapsules which are developed by means of pressure are described in United States Patent Nos. 4,416,966; 4,483,912;
4,352,200;
4,535,050; 4,535,463; 4,551,407; 4,562,137 and 4,608,330; and also in EP-A
139,479; EP-A
162,664; EP-A 164,931; EP-A 237,024; EP-A 237,025 and EP-A 260,129. In all these systems, the compounds can be put into the dye-receiving layer. The compounds can, however, also be put into the donor layer in order to protect the color formers from light.
Photographic materials which can be stabilized are photographic dyes and layers containing such dyes or precursors thereof, for example, photographic paper and films.
Suitable materials are, for example, described in United States Patent No. 5,364,749 which is incorporated herein by reference. The compounds of formula I, III or IV act here as a UV
filter against electrostatic flashes. In color photographic materials, couplers and dyes are also protected against photochemical decomposition.
The instant compounds can be used for all types of color photographic materials. For example, they can be employed for color paper, color reversal paper, direct-positive color material, color negative film, color positive film, color reversal film and the like. They are preferably used inter alia for photographic color material which contains a reversal substrate or form positives.
Color-photographic recording materials usually contain, on a support, a blue-sensitive andlor a green-sensitive and/or a red-sensitive silver halide emulsion layer and, if desired, a protection layer, with the instant compounds being, preferably, either in the green-sensitive or the red-sensitive layer or in a layer between the green-sensitive and the red-sensitive layer or in a layer on top of the silver halide emulsion layers.
The compounds of formula I, III or IV can also be employed in recording materials based on the principles of photopolymerization, photoplasticization or the rupture of microcapsules, or in cases where heat-sensitive and light-sensitive diazonium salts, leuko dyes having an oxidizing agent or dye lactones having Lewis acids are used.
Furthermore, the instant compounds can be employed in recording materials for dye diffusion transfer printing, thermal wax transfer printing and non-matrix printing and for use with electrostatic, electrographic, electrophoretic, magnetographic and laser-electrophoto-graphic printers and pen-plotters. Of the above, recording materials for dye diffusion transfer printing are preferred, for example, as described in EP-A 507,734.
The instant compounds can also be employed in inks, preferably for ink jet printing, for example, as described in United States Patent No. 5,098,477 which is incorporated herein by reference.
The compounds of this invention exhibit superior hydrolytic stability, handling and storage stability as well as good resistance to extractability when present in a stabilized composition.
The methodology to make the instant compounds is described in the prior art.
The intermediates needed to make the instant compounds are largely items of commerce.
In general polymers which can be stabilized include 1. Polymers of monoolefins and diolefins, for example polypropylene, polyisobutylene, polybut-1-ene, poly-4-methylpent-1-ene, polyisoprene or polybutadiene, as well as polymers of cycloolefins, for instance of cyclopentene or norbornene, polyethylene (which optionally can be crosslinked), for example high density polyethylene (HDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), branched low density polyethylene (BLDPE).
Polyolefins, i.e. the polymers of monoolefins exemplified in the preceding paragraph, preferably polyethylene and polypropylene, can be prepared by different, and especially by the following, methods:
a) radical polymerisation (normally under high pressure and at elevated temperature).
b) catalytic polymerisation using a catalyst that normally contains one or more than one metal of groups IVb, Vb, Vlb or VIII of the Periodic Table. These metals usually have one or more than one ligand, typically oxides, halides, alcoholates, esters, ethers, amines, alkyls, alkenyls and/or aryls that may be either p- or s-coordinated. These metal complexes may be in the free form or fixed on substrates, typically on activated magnesium chloride, titanium(///) chloride, alumina or silicon oxide. These catalysts may be soluble or insoluble in the polymerisation medium. The catalysts can be used by themselves in the poly-merisation or further activators may be used, typically metal alkyls, metal hydrides, metal alkyl halides, metal alkyl oxides or metal alkyloxanes, said metals being elements of groups la, Ila and/or Illa of the Periodic Table. The activators may be modified conveniently with further ester, ether, amine or silyl ether groups. These catalyst systems are usually termed Phillips, Standard Oil Indiana, Ziegler (-Natta), TNZ (DuPont), metallocene or single site catalysts (SSC).
2. Mixtures of the polymers mentioned under 1 ), for example mixtures of polypropylene with polyisobutylene, polypropylene with polyethylene (for example PP/HDPE, PP/LDPE) and mixtures of different types of polyethylene (for example LDPE/HDPE).
3. Copolymers of monoolefins and diolefins with each other or with other vinyl monomers, for example ethylene/propylene copolymers, linear low density polyethylene (LLDPE) and mixtures thereof with low density polyethylene (LDPE), propylene/but-1-ene copolymers, propylene/isobutylene copolymers, ethylene/but-1-ene copolymers, ethylene/hexene copolymers, ethylene/methylpentene copolymers, ethylene/heptene copolymers, ethylene/octene copolymers, propylene/butadiene copolymers, isobutylene/isoprene copolymers, ethylene/alkyl acrylate copolymers, ethylene/alkyl methacrylate copolymers, ethylene/vinyl acetate copolymers and their copolymers with carbon monoxide or ethylene/acrylic acid copolymers and their salts (ionomers) as well as terpolymers of ethylene with propylene and a diene such as hexadiene, dicyclopentadiene or ethylidene-norbornene; and mixtures of such copolymers with one another and with polymers men-tioned in 1 ) above, for example polypropylene/ethylene-propylene copolymers, LDPE/ethylene-vinyl acetate copolymers (EVA), LDPE/ethylene-acrylic acid copolymers (EAA), LLDPE/EVA, LLDPEIEAA and alternating or random polyalkylene/carbon monoxide copolymers and mixtures thereof with other polymers, for example polyamides.
4. Hydrocarbon resins (for example CS-C9) including hydrogenated modifications thereof (e.g. tackifiers) and mixtures of polyalkylenes and starch.
5. Polystyrene, polyp-methylstyrene), poly(a-methylstyrene).
6. Copolymers of styrene or a-methylstyrene with dienes or acrylic derivatives, for example styrene/butadiene, styrene/acrylonitrile, styrene/alkyl methacrylate, styrenelbutadienelalkyl acrylate, styrene/butadienelalkyl methacrylate, styrene/maleic anhydride, styrene/-acrylonitrile/methyl acrylate; mixtures of high impact strength of styrene copolymers and another polymer, for example a polyacrylate, a diene polymer or an ethylene/propylene/diene terpolymer; and block copolymers of styrene such as styrene/butadiene/styrene, styrene/isoprene/styrene, styrene/ethylene/butylene/styrene or styrene/ethylene/propylene/
styrene.
7. Graft copolymers of styrene or a-methylstyrene, for example styrene on polybutadiene, styrene on polybutadiene-styrene or polybutadiene-acrylonitrile copolymers;
styrene and acrylonitrile (or methacrylonitrile) on polybutadiene; styrene, acrylonitrile and methyl meth-acrylate on polybutadiene; styrene and malefic anhydride on polybutadiene;
styrene, acrylo-nitrite and malefic anhydride or maleimide on polybutadiene; styrene and maleimide on poly-butadiene; styrene and alkyl acrylates or methacrylates on polybutadiene;
styrene and acrylonitrile on ethylene/propylene/diene terpolymers; styrene and acrylonitrile on polyalkyl acrylates or polyalkyl methacrylates, styrene and acrylonitrile on acrylatelbutadiene copoly-mers, as well as mixtures thereof with the copolymers listed under 6), for example the copolymer mixtures known as ABS, MBS, ASA or AES polymers.
8. Halogen-containing polymers such as polychloroprene, chlorinated rubbers, chlorinated or sulfochlorinated polyethylene, copolymers of ethylene and chlorinated ethylene, epichloro-hydrin homo- and copolymers, especially polymers of halogen-containing vinyl compounds, for example polyvinyl chloride, polyvinylidene chloride, polyvinyl fluoride, polyvinylidene fluoride, as well as copolymers thereof such as vinyl chloride/vinylidene chloride, vinyl chloride/vinyl acetate or vinylidene chloridelvinyl acetate copolymers.
9. Polymers derived from a,b-unsaturated acids and derivatives thereof such as polyacry-lates and polymethacrylates; polymethyl methacrylates, polyacrylamides and polyacryloni-triles, impact-modified with butyl acrylate.
10. Copolymers of the monomers mentioned under 9) with each other or with other unsatu-rated monomers, for example acrylonitrile/ butadiene copolymers, acrylonitrile/alkyl acrylate copolymers, acrylonitrile/alkoxyalkyl acrylate or acrylonitrile/vinyl halide copolymers or acrylonitrile/ alkyl methacrylate/butadiene terpolymers.
11. Polymers derived from unsaturated alcohols and amines or the acyl derivatives or acetals thereof, for example polyvinyl alcohol, polyvinyl acetate, polyvinyl stearate, polyvinyl benzoate, polyvinyl maleate, polyvinyl butyral, polyallyl phthalate or polyallyl melamine; as well as their copolymers with olefins mentioned in 1 ) above.
12. Homopolymers and copolymers of cyclic ethers such as polyalkylene glycols, polyethy-lene oxide, polypropylene oxide or copolymers thereof with bisglycidyl ethers.
13. Polyacetals such as polyoxymethylene and those polyoxymethylenes which contain ethylene oxide as a comonomer; polyacetals modified with thermoplastic polyurethanes, acrylates or MBS.
14. Polyphenylene oxides and sulfides, and mixtures of polyphenylene oxides with styrene polymers or polyamides.
15. Polyurethanes derived from hydroxyl-terminated polyethers, polyesters or polybuta-dienes on the one hand and aliphatic or aromatic polyisocyanates on the other, as well as precursors thereof.
16. Polyamides and copolyamides derived from diamines and dicarboxylic acids and/or from aminocarboxylic acids or the corresponding lactams, for example polyamide 4, polyamide 6, polyamide 6/6, 6/10, 6/9, 6/12, 4/6, 12/12, polyamide 11, polyamide 12, aromatic polyamides starting from m-xylene diamine and adipic acid; polyamides prepared from hexa-methylenediamine and isophthalic or/and terephthalic acid and with or without an elastomer as modifier, for example poly-2,4,4,-trimethylhexamethylene terephthalamide or poly-m-phenylene isophthalamide; and also block copolymers of the aforementioned polyamides with polyolefins, olefin copolymers, ionomers or chemically bonded or grafted elastomers; or with polyethers, e.g. with polyethylene glycol, polypropylene glycol or polytetramethylene glycol; as well as polyamides or copolyamides modified with EPDM or ABS; and polyamides condensed during processing (RIM polyamide systems).
17. Polyureas, polyimides, polyamide-imides and polybenzimidazoles.
18. Polyesters derived from dicarboxylic acids and diols and/or from hydroxycarboxylic acids or the corresponding lactones, for example polyethylene terephthalate, polybutylene tereph-thalate, poly-1,4-dimethylolcyclohexane terephthalate and polyhydroxybenzoates, as well as block copolyether esters derived from hydroxyl-terminated polyethers; and also polyesters modified with polycarbonates or MBS.
19. Polycarbonates and polyester carbonates.
20. Polysulfones, polyether sulfones and polyether ketones.
21. Crosslinked polymers derived from aldehydes on the one hand and phenols, ureas and melamines on the other hand, such as phenol/formaldehyde resins, urea/formaldehyde resins and melaminelformaldehyde resins.
22. Drying and non-drying alkyd resins.
23. Unsaturated polyester resins derived from copolyesters of saturated and unsaturated dicarboxylic acids with polyhydric alcohols and vinyl compounds as crosslinking agents, and also halogen-containing modifications thereof of low flammability.
24. Crosslinkable acrylic resins derived from substituted acrylates, for example epoxy acry-lates, urethane acrylates or polyester acrylates.
25. Alkyd resins, polyester resins and acrylate resins crosslinked with melamine resins, urea resins, polyisocyanates or epoxy resins.
26. Crosslinked epoxy resins derived from polyepoxides, for example from bisglycidyl ethers or from cycloaliphatic diepoxides.
27. Natural polymers such as cellulose, rubber, gelatin and chemically modified homologous derivatives thereof, for example cellulose acetates, cellulose propionates and cellulose butyrates, or the cellulose ethers such as methyl cellulose; as well as rosins and their deri-vatives.
28. Blends of the aforementioned polymers (polyblends), for example PP/EPDM, Poly-amide/EPDM or ABS, PVC/EVA, PVC/ABS, PVC/MBS, PC/ABS, PBTP/ABS, PC/ASA, PC/PBT, PVC/CPE, PVC/acrylates, POMlthermoplastic PUR, PC/thermoplastic PUR, POM/acrylate, POM/MBS, PPO/HIPS, PPO/PA 6.6 and copolymers, PA/HDPE, PA/PP, PA/P PO.
29. Naturally occurring and synthetic organic materials which are pure monomeric com-pounds or mixtures of such compounds, for example mineral oils, animal and vegetable fats, oil and waxes, or oils, fats and waxes based on synthetic esters (e.g.
phthalates, adipates, phosphates or trimellitates) and also mixtures of synthetic esters with mineral oils in any weight ratios, typically those used as spinning compositions, as well as aqueous emulsions of such materials.
phthalates, adipates, phosphates or trimellitates) and also mixtures of synthetic esters with mineral oils in any weight ratios, typically those used as spinning compositions, as well as aqueous emulsions of such materials.
30. Aqueous emulsions of natural or synthetic rubber, e.g. natural latex or latices of carboxylated styrene/butadiene copolymers.
31. Polysiloxanes such as the soft, hydrophilic polysiloxanes described, for example, in U.S.
Patent No. 4,259,467; and the hard polyorganosiloxanes described, for example, in U.S.
Patent No. 4,355,147.
Patent No. 4,259,467; and the hard polyorganosiloxanes described, for example, in U.S.
Patent No. 4,355,147.
32. Polyketimines in combination with unsaturated acrylic polyacetoacetate resins or with unsaturated acrylic resins. The unsaturated acrylic resins include the urethane acrylates, polyether acrylates, vinyl or acryl copolymers with pendant unsaturated groups and the acrylated melamines. The polyketimines are prepared from polyamines and ketones in the presence of an acid catalyst.
33. Radiation curable compositions containing ethylenically unsaturated monomers or oligomers and a polyunsaturated aliphatic oligomer.
34. Epoxymelamine resins such as light-stable epoxy resins crosslinked by an epoxy functional coetherified high solids melamine resin such as LSE-4103 (Monsanto).
In general, the compounds of the present invention are employed in from about 0.01 to about 5% by weight of the stabilized composition, although this will vary with the particular substrate and application. An advantageous range is from about 0.05 to about 3%, and especially 0.05 to about 1 %. However, some high performance films or in UV
absorbing layers of laminates such as those produced by coextrusion may contain from 5-15% by weight of the instant compounds. Concentrations of 5-10% by weight are typical in certain coextrusion applications.
The stabilizers of the instant invention may readily be incorporated into the organic polymers by conventional techniques, at any convenient stage prior to the manufacture of shaped articles therefrom. For example, the stabilizer may be mixed with the polymer in dry powder form, or a suspension or emulsion of the stabilizer may be mixed with a solution, suspension, or emulsion of the polymer. The resulting stabilized polymer compositions of the invention may optionally also contain from about 0.01 to about 5%, preferably from about 0.025 to about 2%, and especially from about 0.1 to about 1 % by weight of various conventional additives, such as the materials listed below, or mixtures thereof.
1. Antioxidants 1.1. Alkylated monophenols, for example, 2,6-di-tert-butyl-4-methylphenol 2-tert-butyl-4,6-dimethylphenol 2,6-di-tert-butyl-4-ethylphenol 2,6-di-tert-butyl-4-n-butylphenol 2,6-di-tert-butyl-4-i-butylphenol 2,6-di-cyclopentyl-4-methylphenol 2-(a-methylcyclohexyl)-4,6-dimethylphenol 2,6-di-octadecyl-4-methylphenol 2,4,6-tri-cyclohexylphenol 2,6-di-tert-butyl-4-methoxymethylphenol 1.2. Alk lair ted hydroquinones, for example.
2,6-di-tert-butyl-4-methoxyphenol 2,5-di-tert-butyl-hydroquinone 2,5-di-tert-amyl-hydroquinone 2,6-diphenyl-4-octadecyloxyphenol 1.3. Hydroxylated thiod~henyl ethers, for example.
2,2'-thio-bis-(6-tert-butyl-4-methylphenol) 2,2'-thio-bis-(4-octylphenol) 4,4'-thio-bis-(6-tert-butyl-3-methylphenol) 4,4'-thio-bis-(6-tert-butyl-2-methylphenol) 1.4. Alkvlidene-bisphenols, for example.
2,2'-methylene-bis-(6-tert-butyl-4-methylphenol) 2,2'-methylene-bis-(6-tert-butyl-4-ethylphenol) 2,2'-methylene-bis-[4-methyl-6-(a-methylcyclohexyl)-phenol]
2,2'-methylene-bis-(4-methyl-6-cyclohexylphenol) 2,2'-methylene-bis-(6-nonyl-4-methylphenol) 2,2'-methylene-bis-[6-(a-methylbenzyl)-4-nonylphenol]
2,2'-methylene-bis-[6-(a,a-dimethylbenzyl)-4-nonylphenol]
2,2'-methylene-bis-(4,6-di-tert-butylphenol) 2,2'-ethylidene-bis-(4,6-di-tert-butylphenol) 2,2'-ethylidene-bis-(6-tert-butyl-4-isobutylphenol) 4,4'-methylene-bis-(2,6-di-tert-butylphenol) 4,4'-methylene-bis-(6-tert-butyl-2-methylphenol) 1,1-bis-(5-tert-butyl-4-hydroxy-2-methylphenyl)-butane 2,6-di-(3-tert-butyl-5-methyl-2-hydroxybenzyl)-4-methylphenol 1,1,3-tris-(5-tert-butyl-4-hydroxy-2-methylphenyl)-butane 1,1-bis-(5-tert-butyl-4-hydroxy-2-methylphenyl)-3-n-dodecylmercaptobutane ethyleneglycol bis-(3,3-bis-(3'-tert-butyl-4'-hydroxyphenyl)-butyrate]
di-(3-tert-butyl-4-hydroxy-5-methylphenyl)-dicyclopentadiene di-[2-(3'-tert-butyl-2'-hydroxy-5'-methyl-benzyl)-6-tert-butyl-4-methylphenyl]
terephthalate.
1.5. Benzvl compounds, for example.
1,3,5-tri-(3,5-di-tert-butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene di-(3,5-di-tert-butyl-4-hydroxybenzyl) sulfide 3,5-di-tert-butyl-4-hydroxybenzyl-mercapto-acetic acid isooctyl ester bis-(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)dithiol terephthalate 1,3,5-tris-(3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate 1,3,5-tris-(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanurate 3,5-di-tert-butyl-4-hydroxybenzyl-phosphoric acid dioctadecyl ester 3,5-di-tert-butyl-4-hydroxybenzyl-phosphoric acid monoethyl ester, calcium-salt 1.6. Ac la~phenols, for example, 4-hydroxy-lauric acid anilide 4-hydroxy-stearic acid anilide 2,4-bis-octylmercapto-6-(3,5-tert-butyl-4-hydroxyanilino)-s-triazine octyl-N-(3,5-di-tert-butyl-4-hydroxyphenyl)-carbamate 1.7. Esters of b-(3.5-di-tert-butyl-4-hydroxyphenyl~proaionic acid with monohydric or polyhydric alcohols, for example, methanol diethylene glycol octadecanol triethylene glycol 1,6-hexanediol pentaerythritol neopentyl glycol tris-hydroxyethyl isocyanurate thiodiethylene glycol di-hydroxyethyl oxalic acid diamide triethanolamine triisopropanolamine 1.8. Esters of b-(5-tert-butyl-4-hydroxy-3-methyphenyl~propionic acid with monohydric or polyhydric alcohols, for example, methanol diethylene glycol octadecanol triethylene glycol 1,6-hexanediol pentaerythritol neopentyl glycol tris-hydroxyethyl isocyanurate thiodiethylene glycol di-hydroxyethyl oxalic acid diamide triethanolamine triisopropanolamine 1.9. Amides of b ~3.5-di-tert-butyl-4-hvdroxyphenyl)-propionic acid for example, N,N'-di-(3,5-di-tert-butyl-4-hydroxyphenylpropionyl)-hexamethylenediamine N,N'-di-(3,5-di-tert-butyl-4-hydroxyphenylpropionyl)-trimethylenediamine N,N'-di-(3,5-di-tert-butyl-4-hydroxyphenylpropionyl)-hydrazine 1.10 Diarylamines, for example, diphenylamine, N-phenyl-1-naphthylamine, N-(4-tert-octylphenyl)-1-naphthylamine, 4,4'-di-tert-octyl-diphenylamine, reaction product of N-phenylbenzylamine and 2,4,4-trimethylpentene, reaction product of diphenylamine and 2,4,4-trimethylpentene, reaction product of N-phenyl-1-naphthylamine and 2,4,4-trimethylpentene.
2. UV absorbers and liaht stabilizers 2.1. 2-(2'-Hydroxyphenyl)-benzotriazoles, for example, the 5'-methyl-, 3',5'-di-tert-butyl-, 5'-tert-butyl-, 5'-(1,1,3,3-tetramethylbutyl)-, 5-chloro-3',5'-di-tert-butyl-, 5-chloro-3'-tert-butyl-5'-methyl-, 3'-sec-butyl-5'-tert-butyl-, 4'-octoxy, 3',5'-di-tert-amyl-, 3',5'-bis-(a,a-dimethylbenzyl), 3'-tert-butyl-5'-(2-(omega-hydroxy-octa-(ethyleneoxy)carbonyl-ethyl)-, 3'-dodecyl-5'-methyl-, and 3'-tert-butyl-5'-(2-octyloxycarbonyl)ethyl-, and dodecylated-5'-methyl derivatives.
2.2. 2-H dy roxy-benzophenones, for example, the 4-hydroxy-, 4-methoxy-, 4-octoxy, 4-decyloxy-, 4-dodecyloxy-, 4-benzyloxy, 4,2',4'-trihydroxy- and 2'-hydroxy-4,4'-dimethoxy derivatives.
2.3. Esters of optionally substituted benzoic acids for example, phenyl salicylate, 4-tert-butylphenyl salicylate, octylphenyl salicylate, dibenzoylresorcinol, bis-(4-tert-butylbenzoyl)-resorcinol, benzoylresorcinol, 3,5-di-tert-butyl-4-hydroxybenzoic acid 2,4-di-tert-butylphenyl ester and 3,5-di-tert-butyl-4-hydroxybenzoic acid hexadecyl ester.
2.4. Ac, Iry ates, for example, a-cyano-b,b-diphenylacrylic acid ethyl ester or isooctyl ester, a-carbomethoxy-cinnamic acid methyl ester, a-cyano-b-methyl-p-methoxy-cinnamic acid methyl ester or butyl ester, a-carbomethoxy-p-methoxy-cinnamic acid methyl ester, N-(b-carbomethoxy-b-cyanovinyl)-2-methyl-indoline.
2.5. Nickel compounds, for example, nickel complexes of 2,2'-thio-bis-[4-(1,1,3,3-tetramethylbutyl)-phenol], such as the 1:1 or 1:2 complex, optionally with additional ligands such as n-butylamine, triethanolamine or N-cyclohexyl-diethanolamine, nickel dibutyldithiocarbamate, nickel salts of 4-hydroxy-3,5-di-tert-butylbenzylphosphonic acid monoalkyl esters, such as of the methyl, ethyl or butyl ester, nickel complexes of ketoximes such as of 2-hydroxy-4-methyl-phenyl undecyl ketoxime, nickel complexes of 1-phenyl-4-lauroyl-5-hydroxy-pyrazole, optionally with additional ligands.
2.6. Sterically hindered amines, for example bis-(2,2,6,6-tetramethylpiperidyl) sebacate, bis-(1,2,2,6,6-pentamethylpiperidyl) sebacate, n-butyl-3,5-di-tert.butyl-4-hydroxybenzyl malonic acid bis-(1,2,2,6,6-pentanemethylpiperidyl)ester, condensation product of 1-hydroxyethyl-2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid, condensation product of N,N'-(2,2,6,6-tetramethylpiperidyl)-hexamethylenediamine and 4-tert-octylamino-2,6-dichloro-s-triazine, tris-(2,2,6,6-tetramethylpiperidyl)-nitrilotriacetate, tetrakis-(2,2,6,6-tetramethyl-4-piperidyl) 1,2,3,4-butanetetracarboxylate, 1,1'(1,2-ethanediyl)-bis-(3,3,5,5-tetramethylpiperazinone), bis(1-octyloxy-2,2,6,6-tetramethylpiperidin-4-yl) sebacate.
2.7. Oxalic acid diamides, for example, 4,4'-di-octyloxy-oxanilide, 2,2'-di-octyloxy-5,5'-di-tert-butyl-oxanilide, 2,2'-di-dodecyloxy-5,5'-di-tert-butyl-oxanilide, 2-ethoxy-2'-ethyl-oxanilide, N,N'-bis (3-dimethylaminopropyl)-oxalamide, 2-ethoxy-5-tert-butyl-2'-ethyloxanilide and its mixture with 2-ethoxy-2'-ethyl-5,4'-di-tert-butyloxanilide and mixtures of ortho- and para-methoxy- as well as of o- and p-ethoxy-disubstituted oxanilides.
2.8. Hydroxyahenyl-s-triazines, for example 2,6-bis-(2,4-dimethylphenyl)-4-(2-hydroxy-4-octyloxyphenyl)-s-triazine; 2,6-bis-(2,4-dimethylphenyl)-4-(2,4-dihydroxyphenyl)-s-triazine;
2,4-bis(2,4-dihydroxyphenyl)-6-(4-chlorophenyl)-s-triazine; 2,4-bis[2-hydroxy-4-(2-hydroxy-ethoxy)phenyl]-6-(4-chlorophenyl)-s-triazine; 2,4-bis[2-hydroxy-4-(2-hydroxy-4-(2-hydroxy-ethoxy)phenyl]-6-(2,4-dimethylphenyl)-s-triazine; 2,4-bis[2-hydroxy-4-(2-hydroxyethoxy)-phenyl]-6-(4-bromophenyl)-s-triazine; 2,4-bas[2-hydroxy-4-(2-acetoxyethoxy)phenyl]-6-(4-chlorophenyl)-s-triazine, 2,4-bas(2,4-dihydroxyphenyl)-6-(2,4-dimethylphenyl)-s-triazine.
3. Metal deactivators, for example, N,N'-diphenyloxalic acid diamide, N-salicylal-N'-salicyloylhydrazine, N,N'-bas-salicyloylhydrazine, N,N'-bas-(3,5-di-tert-butyl-4-hydroxypheny~
propionyl)-hydrazine, 3-salicyloylamino-1,2,4-triazole, bas-benzylidene-oxalic acid dihydrazide.
4. Phosphates and phosphonites, for example, triphenyl phosphate, diphenylalkyl phosphates, phenyldialkyl phosphates, tri-(nonylphenyl) phosphate, trilauryl phosphate, trioctadecyl phosphate, di-stearyl-pentaerythritol diphosphite, tris-(2,4-di-tert-butylphenyl) phosphate, di-isodecylpentaerythritol diphosphite, di-(2,4,6-tri-tent-butylphenyl)-pentaerythritol diphosphite, di-(2,4-di-tert-butyl-6-methylphenyl)-pentaerythritol diphosphite, di-(2,4-di-tert-butylphenyl)pentaerythritol diphosphite, tristearyl-sorbitol triphosphite, tetrakis-(2,4-di-tert-butylphenyl) 4,4'-diphenylylenediphosphonite.
5. Compounds which destroy~eroxide, for example, esters of b-thiodipropionic acid, for example the lauryl, stearyl, myristyl or tridecyl esters, mercapto-benzimidazole or the zinc salt of 2-mercaptobenzimidazole, zinc dibutyl-dithiocarbamate, dioctadecyl disulfide, pentaerythritol tetrakis-(b-dodecylmercapto)-propionate.
6. Hydroxylamines, for example, N,N-dibenzylhydroxylamine, N,N-diethylhydroxylamine, N,N-dioctylhydroxylamine, N,N-dilaurylhydroxylamine, N,N-ditetradecylhydroxylamine, N,N-dihexadecylhydroxylamine, N,N-dioctadecylhydroxylamine, N-hexadecyl-N-octadecyE
hydroxylamine, N-heptadecyl-N-octadecylhydroxylamine, N,N-dialkylhydroxylamine derived from hydrogenated tallow amine.
7. Nitrones, for example, N-benzyl-alpha-phenyl nitrone, N-ethyl-alpha-methyl nitrone, N-octyl-alpha-heptyl nitrone, N-lauryl-alpha-undecyl nitrone, N-tetradecyl-alpha-tridecyl nitrone, N-hexadecyl-alpha-pentadecyl nitrone, N-octadecyl-alpha-heptadecylnitrone, N-hexadecyl-alpha-heptadecyl nitrone, N-octadecyl-alpha-pentadecyl nitrone, N-heptadecyl-alpha-heptadecyl nitrone, N-octadecyl-alpha-hexadecyl nitrone, nitrone derived from N,N-dialkylhydroxylamine derived from hydrogenated tallow amine.
8. Polyamide stabilizers, for example copper salts in combination with iodides and/or phosphorus compounds and salts of divalent manganese.
9. Basic co-stabilizers, for example, melamine, polyvinylpyrrolidone, dicyandiamide, triallyl cyanurate, urea derivatives, hydrazine derivatives, amines, polyamides, polyurethanes, alkali metal salts and alkaline earth metal salts of higher fatty acids for example Ca stearate, Zn stearate, Mg stearate, Na ricinoleate and K palmitate, antimony pyrocatecholate or zinc pyrocatecholate.
10. Nucleatingi agents, for example, 4-tert-butyl-benzoic acid, adipic acid, diphenylacetic acid.
11. Fillers and reinforcing agents, for example, calcium carbonate, silicates, glass fibers, asbestos, talc, kaolin, mica, barium sulfate, metal oxides and hydroxides, carbon black, graphite.
12. Other additives, for example, plasticizers, lubricants, emulsifiers, pigments, optical brighteners, flameproofing agents, anti-static agents, blowing agents and thiosynergists such as dilauryl thiodipropionate or distearyl thiodipropionate.
13. Benzofuranones and indolinones, for example those disclosed in US-A-4325863, US-A-4338244 or US-A-5175312, or 3-[4-(2-acetoxyethoxy)phenyl]-5,7-di-tert-butyl-benzofuran-2-one, 5,7-di-tert-butyl-3-[4-(2-stearoyloxyethoxy)phenyl]benzofuran-2-one, 3,3'-bis[5,7-di-tert-butyl-3-(4-[2-hydroxyethoxy]phenyl)benzofuran-2-one], 5,7-di-tert-butyl-3-(4-ethoxyphenyl)-benzofuran-2-one, 3-(4-acetoxy-3,5-dimethylphenyl)-5,7-di-tert-butyl-benzofuran-2-one, 3-(3,5-dimethyl-4-pivaloyloxyphenyl)-5,7-di-tert-butyl-benzofuran-2-one.
The co-stabilizers, with the exception of the benzofuranones listed under 13, are added for example in concentrations of 0.01 to 10%, relative to the total weight of the material to be stabilized.
Further preferred compositions comprise, in addition to components (a) and (b) further addi-tives, in particular phenolic antioxidants, light stabilizers or processing stabilizers.
Particularly preferred additives are phenolic antioxidants (item 1 of the list), sterically hin-dered amines (item 2.6 of the list), phosphites and phosphonites (item 4 of the list), UV
absorbers (item 2 of the list) and peroxide-destroying compounds (item 5 of the list).
In general, the compounds of the present invention are employed in from about 0.01 to about 5% by weight of the stabilized composition, although this will vary with the particular substrate and application. An advantageous range is from about 0.05 to about 3%, and especially 0.05 to about 1 %. However, some high performance films or in UV
absorbing layers of laminates such as those produced by coextrusion may contain from 5-15% by weight of the instant compounds. Concentrations of 5-10% by weight are typical in certain coextrusion applications.
The stabilizers of the instant invention may readily be incorporated into the organic polymers by conventional techniques, at any convenient stage prior to the manufacture of shaped articles therefrom. For example, the stabilizer may be mixed with the polymer in dry powder form, or a suspension or emulsion of the stabilizer may be mixed with a solution, suspension, or emulsion of the polymer. The resulting stabilized polymer compositions of the invention may optionally also contain from about 0.01 to about 5%, preferably from about 0.025 to about 2%, and especially from about 0.1 to about 1 % by weight of various conventional additives, such as the materials listed below, or mixtures thereof.
1. Antioxidants 1.1. Alkylated monophenols, for example, 2,6-di-tert-butyl-4-methylphenol 2-tert-butyl-4,6-dimethylphenol 2,6-di-tert-butyl-4-ethylphenol 2,6-di-tert-butyl-4-n-butylphenol 2,6-di-tert-butyl-4-i-butylphenol 2,6-di-cyclopentyl-4-methylphenol 2-(a-methylcyclohexyl)-4,6-dimethylphenol 2,6-di-octadecyl-4-methylphenol 2,4,6-tri-cyclohexylphenol 2,6-di-tert-butyl-4-methoxymethylphenol 1.2. Alk lair ted hydroquinones, for example.
2,6-di-tert-butyl-4-methoxyphenol 2,5-di-tert-butyl-hydroquinone 2,5-di-tert-amyl-hydroquinone 2,6-diphenyl-4-octadecyloxyphenol 1.3. Hydroxylated thiod~henyl ethers, for example.
2,2'-thio-bis-(6-tert-butyl-4-methylphenol) 2,2'-thio-bis-(4-octylphenol) 4,4'-thio-bis-(6-tert-butyl-3-methylphenol) 4,4'-thio-bis-(6-tert-butyl-2-methylphenol) 1.4. Alkvlidene-bisphenols, for example.
2,2'-methylene-bis-(6-tert-butyl-4-methylphenol) 2,2'-methylene-bis-(6-tert-butyl-4-ethylphenol) 2,2'-methylene-bis-[4-methyl-6-(a-methylcyclohexyl)-phenol]
2,2'-methylene-bis-(4-methyl-6-cyclohexylphenol) 2,2'-methylene-bis-(6-nonyl-4-methylphenol) 2,2'-methylene-bis-[6-(a-methylbenzyl)-4-nonylphenol]
2,2'-methylene-bis-[6-(a,a-dimethylbenzyl)-4-nonylphenol]
2,2'-methylene-bis-(4,6-di-tert-butylphenol) 2,2'-ethylidene-bis-(4,6-di-tert-butylphenol) 2,2'-ethylidene-bis-(6-tert-butyl-4-isobutylphenol) 4,4'-methylene-bis-(2,6-di-tert-butylphenol) 4,4'-methylene-bis-(6-tert-butyl-2-methylphenol) 1,1-bis-(5-tert-butyl-4-hydroxy-2-methylphenyl)-butane 2,6-di-(3-tert-butyl-5-methyl-2-hydroxybenzyl)-4-methylphenol 1,1,3-tris-(5-tert-butyl-4-hydroxy-2-methylphenyl)-butane 1,1-bis-(5-tert-butyl-4-hydroxy-2-methylphenyl)-3-n-dodecylmercaptobutane ethyleneglycol bis-(3,3-bis-(3'-tert-butyl-4'-hydroxyphenyl)-butyrate]
di-(3-tert-butyl-4-hydroxy-5-methylphenyl)-dicyclopentadiene di-[2-(3'-tert-butyl-2'-hydroxy-5'-methyl-benzyl)-6-tert-butyl-4-methylphenyl]
terephthalate.
1.5. Benzvl compounds, for example.
1,3,5-tri-(3,5-di-tert-butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene di-(3,5-di-tert-butyl-4-hydroxybenzyl) sulfide 3,5-di-tert-butyl-4-hydroxybenzyl-mercapto-acetic acid isooctyl ester bis-(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)dithiol terephthalate 1,3,5-tris-(3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate 1,3,5-tris-(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanurate 3,5-di-tert-butyl-4-hydroxybenzyl-phosphoric acid dioctadecyl ester 3,5-di-tert-butyl-4-hydroxybenzyl-phosphoric acid monoethyl ester, calcium-salt 1.6. Ac la~phenols, for example, 4-hydroxy-lauric acid anilide 4-hydroxy-stearic acid anilide 2,4-bis-octylmercapto-6-(3,5-tert-butyl-4-hydroxyanilino)-s-triazine octyl-N-(3,5-di-tert-butyl-4-hydroxyphenyl)-carbamate 1.7. Esters of b-(3.5-di-tert-butyl-4-hydroxyphenyl~proaionic acid with monohydric or polyhydric alcohols, for example, methanol diethylene glycol octadecanol triethylene glycol 1,6-hexanediol pentaerythritol neopentyl glycol tris-hydroxyethyl isocyanurate thiodiethylene glycol di-hydroxyethyl oxalic acid diamide triethanolamine triisopropanolamine 1.8. Esters of b-(5-tert-butyl-4-hydroxy-3-methyphenyl~propionic acid with monohydric or polyhydric alcohols, for example, methanol diethylene glycol octadecanol triethylene glycol 1,6-hexanediol pentaerythritol neopentyl glycol tris-hydroxyethyl isocyanurate thiodiethylene glycol di-hydroxyethyl oxalic acid diamide triethanolamine triisopropanolamine 1.9. Amides of b ~3.5-di-tert-butyl-4-hvdroxyphenyl)-propionic acid for example, N,N'-di-(3,5-di-tert-butyl-4-hydroxyphenylpropionyl)-hexamethylenediamine N,N'-di-(3,5-di-tert-butyl-4-hydroxyphenylpropionyl)-trimethylenediamine N,N'-di-(3,5-di-tert-butyl-4-hydroxyphenylpropionyl)-hydrazine 1.10 Diarylamines, for example, diphenylamine, N-phenyl-1-naphthylamine, N-(4-tert-octylphenyl)-1-naphthylamine, 4,4'-di-tert-octyl-diphenylamine, reaction product of N-phenylbenzylamine and 2,4,4-trimethylpentene, reaction product of diphenylamine and 2,4,4-trimethylpentene, reaction product of N-phenyl-1-naphthylamine and 2,4,4-trimethylpentene.
2. UV absorbers and liaht stabilizers 2.1. 2-(2'-Hydroxyphenyl)-benzotriazoles, for example, the 5'-methyl-, 3',5'-di-tert-butyl-, 5'-tert-butyl-, 5'-(1,1,3,3-tetramethylbutyl)-, 5-chloro-3',5'-di-tert-butyl-, 5-chloro-3'-tert-butyl-5'-methyl-, 3'-sec-butyl-5'-tert-butyl-, 4'-octoxy, 3',5'-di-tert-amyl-, 3',5'-bis-(a,a-dimethylbenzyl), 3'-tert-butyl-5'-(2-(omega-hydroxy-octa-(ethyleneoxy)carbonyl-ethyl)-, 3'-dodecyl-5'-methyl-, and 3'-tert-butyl-5'-(2-octyloxycarbonyl)ethyl-, and dodecylated-5'-methyl derivatives.
2.2. 2-H dy roxy-benzophenones, for example, the 4-hydroxy-, 4-methoxy-, 4-octoxy, 4-decyloxy-, 4-dodecyloxy-, 4-benzyloxy, 4,2',4'-trihydroxy- and 2'-hydroxy-4,4'-dimethoxy derivatives.
2.3. Esters of optionally substituted benzoic acids for example, phenyl salicylate, 4-tert-butylphenyl salicylate, octylphenyl salicylate, dibenzoylresorcinol, bis-(4-tert-butylbenzoyl)-resorcinol, benzoylresorcinol, 3,5-di-tert-butyl-4-hydroxybenzoic acid 2,4-di-tert-butylphenyl ester and 3,5-di-tert-butyl-4-hydroxybenzoic acid hexadecyl ester.
2.4. Ac, Iry ates, for example, a-cyano-b,b-diphenylacrylic acid ethyl ester or isooctyl ester, a-carbomethoxy-cinnamic acid methyl ester, a-cyano-b-methyl-p-methoxy-cinnamic acid methyl ester or butyl ester, a-carbomethoxy-p-methoxy-cinnamic acid methyl ester, N-(b-carbomethoxy-b-cyanovinyl)-2-methyl-indoline.
2.5. Nickel compounds, for example, nickel complexes of 2,2'-thio-bis-[4-(1,1,3,3-tetramethylbutyl)-phenol], such as the 1:1 or 1:2 complex, optionally with additional ligands such as n-butylamine, triethanolamine or N-cyclohexyl-diethanolamine, nickel dibutyldithiocarbamate, nickel salts of 4-hydroxy-3,5-di-tert-butylbenzylphosphonic acid monoalkyl esters, such as of the methyl, ethyl or butyl ester, nickel complexes of ketoximes such as of 2-hydroxy-4-methyl-phenyl undecyl ketoxime, nickel complexes of 1-phenyl-4-lauroyl-5-hydroxy-pyrazole, optionally with additional ligands.
2.6. Sterically hindered amines, for example bis-(2,2,6,6-tetramethylpiperidyl) sebacate, bis-(1,2,2,6,6-pentamethylpiperidyl) sebacate, n-butyl-3,5-di-tert.butyl-4-hydroxybenzyl malonic acid bis-(1,2,2,6,6-pentanemethylpiperidyl)ester, condensation product of 1-hydroxyethyl-2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid, condensation product of N,N'-(2,2,6,6-tetramethylpiperidyl)-hexamethylenediamine and 4-tert-octylamino-2,6-dichloro-s-triazine, tris-(2,2,6,6-tetramethylpiperidyl)-nitrilotriacetate, tetrakis-(2,2,6,6-tetramethyl-4-piperidyl) 1,2,3,4-butanetetracarboxylate, 1,1'(1,2-ethanediyl)-bis-(3,3,5,5-tetramethylpiperazinone), bis(1-octyloxy-2,2,6,6-tetramethylpiperidin-4-yl) sebacate.
2.7. Oxalic acid diamides, for example, 4,4'-di-octyloxy-oxanilide, 2,2'-di-octyloxy-5,5'-di-tert-butyl-oxanilide, 2,2'-di-dodecyloxy-5,5'-di-tert-butyl-oxanilide, 2-ethoxy-2'-ethyl-oxanilide, N,N'-bis (3-dimethylaminopropyl)-oxalamide, 2-ethoxy-5-tert-butyl-2'-ethyloxanilide and its mixture with 2-ethoxy-2'-ethyl-5,4'-di-tert-butyloxanilide and mixtures of ortho- and para-methoxy- as well as of o- and p-ethoxy-disubstituted oxanilides.
2.8. Hydroxyahenyl-s-triazines, for example 2,6-bis-(2,4-dimethylphenyl)-4-(2-hydroxy-4-octyloxyphenyl)-s-triazine; 2,6-bis-(2,4-dimethylphenyl)-4-(2,4-dihydroxyphenyl)-s-triazine;
2,4-bis(2,4-dihydroxyphenyl)-6-(4-chlorophenyl)-s-triazine; 2,4-bis[2-hydroxy-4-(2-hydroxy-ethoxy)phenyl]-6-(4-chlorophenyl)-s-triazine; 2,4-bis[2-hydroxy-4-(2-hydroxy-4-(2-hydroxy-ethoxy)phenyl]-6-(2,4-dimethylphenyl)-s-triazine; 2,4-bis[2-hydroxy-4-(2-hydroxyethoxy)-phenyl]-6-(4-bromophenyl)-s-triazine; 2,4-bas[2-hydroxy-4-(2-acetoxyethoxy)phenyl]-6-(4-chlorophenyl)-s-triazine, 2,4-bas(2,4-dihydroxyphenyl)-6-(2,4-dimethylphenyl)-s-triazine.
3. Metal deactivators, for example, N,N'-diphenyloxalic acid diamide, N-salicylal-N'-salicyloylhydrazine, N,N'-bas-salicyloylhydrazine, N,N'-bas-(3,5-di-tert-butyl-4-hydroxypheny~
propionyl)-hydrazine, 3-salicyloylamino-1,2,4-triazole, bas-benzylidene-oxalic acid dihydrazide.
4. Phosphates and phosphonites, for example, triphenyl phosphate, diphenylalkyl phosphates, phenyldialkyl phosphates, tri-(nonylphenyl) phosphate, trilauryl phosphate, trioctadecyl phosphate, di-stearyl-pentaerythritol diphosphite, tris-(2,4-di-tert-butylphenyl) phosphate, di-isodecylpentaerythritol diphosphite, di-(2,4,6-tri-tent-butylphenyl)-pentaerythritol diphosphite, di-(2,4-di-tert-butyl-6-methylphenyl)-pentaerythritol diphosphite, di-(2,4-di-tert-butylphenyl)pentaerythritol diphosphite, tristearyl-sorbitol triphosphite, tetrakis-(2,4-di-tert-butylphenyl) 4,4'-diphenylylenediphosphonite.
5. Compounds which destroy~eroxide, for example, esters of b-thiodipropionic acid, for example the lauryl, stearyl, myristyl or tridecyl esters, mercapto-benzimidazole or the zinc salt of 2-mercaptobenzimidazole, zinc dibutyl-dithiocarbamate, dioctadecyl disulfide, pentaerythritol tetrakis-(b-dodecylmercapto)-propionate.
6. Hydroxylamines, for example, N,N-dibenzylhydroxylamine, N,N-diethylhydroxylamine, N,N-dioctylhydroxylamine, N,N-dilaurylhydroxylamine, N,N-ditetradecylhydroxylamine, N,N-dihexadecylhydroxylamine, N,N-dioctadecylhydroxylamine, N-hexadecyl-N-octadecyE
hydroxylamine, N-heptadecyl-N-octadecylhydroxylamine, N,N-dialkylhydroxylamine derived from hydrogenated tallow amine.
7. Nitrones, for example, N-benzyl-alpha-phenyl nitrone, N-ethyl-alpha-methyl nitrone, N-octyl-alpha-heptyl nitrone, N-lauryl-alpha-undecyl nitrone, N-tetradecyl-alpha-tridecyl nitrone, N-hexadecyl-alpha-pentadecyl nitrone, N-octadecyl-alpha-heptadecylnitrone, N-hexadecyl-alpha-heptadecyl nitrone, N-octadecyl-alpha-pentadecyl nitrone, N-heptadecyl-alpha-heptadecyl nitrone, N-octadecyl-alpha-hexadecyl nitrone, nitrone derived from N,N-dialkylhydroxylamine derived from hydrogenated tallow amine.
8. Polyamide stabilizers, for example copper salts in combination with iodides and/or phosphorus compounds and salts of divalent manganese.
9. Basic co-stabilizers, for example, melamine, polyvinylpyrrolidone, dicyandiamide, triallyl cyanurate, urea derivatives, hydrazine derivatives, amines, polyamides, polyurethanes, alkali metal salts and alkaline earth metal salts of higher fatty acids for example Ca stearate, Zn stearate, Mg stearate, Na ricinoleate and K palmitate, antimony pyrocatecholate or zinc pyrocatecholate.
10. Nucleatingi agents, for example, 4-tert-butyl-benzoic acid, adipic acid, diphenylacetic acid.
11. Fillers and reinforcing agents, for example, calcium carbonate, silicates, glass fibers, asbestos, talc, kaolin, mica, barium sulfate, metal oxides and hydroxides, carbon black, graphite.
12. Other additives, for example, plasticizers, lubricants, emulsifiers, pigments, optical brighteners, flameproofing agents, anti-static agents, blowing agents and thiosynergists such as dilauryl thiodipropionate or distearyl thiodipropionate.
13. Benzofuranones and indolinones, for example those disclosed in US-A-4325863, US-A-4338244 or US-A-5175312, or 3-[4-(2-acetoxyethoxy)phenyl]-5,7-di-tert-butyl-benzofuran-2-one, 5,7-di-tert-butyl-3-[4-(2-stearoyloxyethoxy)phenyl]benzofuran-2-one, 3,3'-bis[5,7-di-tert-butyl-3-(4-[2-hydroxyethoxy]phenyl)benzofuran-2-one], 5,7-di-tert-butyl-3-(4-ethoxyphenyl)-benzofuran-2-one, 3-(4-acetoxy-3,5-dimethylphenyl)-5,7-di-tert-butyl-benzofuran-2-one, 3-(3,5-dimethyl-4-pivaloyloxyphenyl)-5,7-di-tert-butyl-benzofuran-2-one.
The co-stabilizers, with the exception of the benzofuranones listed under 13, are added for example in concentrations of 0.01 to 10%, relative to the total weight of the material to be stabilized.
Further preferred compositions comprise, in addition to components (a) and (b) further addi-tives, in particular phenolic antioxidants, light stabilizers or processing stabilizers.
Particularly preferred additives are phenolic antioxidants (item 1 of the list), sterically hin-dered amines (item 2.6 of the list), phosphites and phosphonites (item 4 of the list), UV
absorbers (item 2 of the list) and peroxide-destroying compounds (item 5 of the list).
Additional additives (stabilizers) which are also particularly preferred are benzofuran-2-ones, such as described, for example, in US-A-4 325 863, US-A-4,338 244 or US-A-5175312.
The phenolic antioxidant of particular interest is selected from the group consisting of n-octadecyl 3,5-di-tert-butyl-4-hydroxyhydrocinnamate, neopentanetetrayl tetrakis(3,5-di-tert-butyl-4-hydroxyhydrocinammate), di-n-octadecyl 3,5-di-tert-butyl-4-hydroxybenzylphosphonate, 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate, thiodiethylene bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamate), 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene, 3,6-dioxaoctamethylene bis(3-methyl-5-tert-butyl-4-hydroxyhydrocinnamate), 2,6-di-tert-butyl-p-cresol, 2,2'-ethylidene-bis(4,6-di-tert-butylphenol), 1,3,5-tris(2,6-dimethyl-4-tert-butyl-3-hydroxybenzyl)isocynurate, 1,1,3,-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane, 1,3,5-tris[2-(3,5-di-tert-butyl-4-hydroxyhydrocinnamoyloxy)ethyl]isocyanur ate, 3,5-di-(3,5-di-tert-butyl-4-hydroxybenzyl)mesitol, hexamethylene bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamate), 1-(3,5-di-tert-butyl-4-hydroxyanilino)-3,5-di(octylthio)-s-triazine, N,N'-hexamethylene-bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamamide), calcium bis(ethyl 3,5-di-tert-butyl-4-hydroxybenzyl-phosphonate), ethylene bis[3,3-di(3-tert-butyl-4-hydroxyphenyl)butyrate], octyl 3,5-di-tert-butyl-4-hydroxybenzylmercaptoacetate, bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamoyl)hydrazide, and N,N'-bis[2-(3,5-di-tert-butyl-4-hydroxyhydrocinnamoyloxy)-eth yl]-oxamide.
A most preferred phenolic antioxidant is neopentanetetrayl tetrakis(3,5-di-tert-butyl-4-hydroxyhydrocinnamate), n-octadecyl 3,5-di-tert-butyl-4-hydroxyhydrocinnamate, 1,3,5-tri-methyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene, 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate, 2,6-di-tert-butyl-p-cresol or 2,2'-ethylidene-bis(4,6-di-tert-butylphenol).
The hindered amine compound of particular interest is selected from the group consisting of bis(2,2,6,6-tetramethylpiperidin-4-yl) sebacate, bis(1,2,2,6,6-pentamethylpiperidin-4-yl) sebacate, di(1,2,2,6,6-pentamethylpiperidin-4-yl) (3,5-di-tert-butyl-4-hydroxybenzyl)butylmalonate, 4-benzoyl-2,2,6,6-tetramethylpiperidine, 4-stearyloxy-2,2,6,6-tetramethylpiperidine, 3-n-octyl-7,7,9,9-tetramethyl-1,3,8-triaza-spiro[4.5]decane-2,4-dio ne, tris(2,2,6,6-tetramethylpiperidin-4-yl) nitrilotriacetate, 1,2-bis(2,2,6,6-tetramethyl-3-oxopiperazin-4-yl)ethane, 2,2,4,4-tetramethyl-7-oxa-3,20-diaza-21-oxodispiro[5.1.11.2] heneicosane, polycondensation product of 2,4-dichloro-6-tert-octylamino-s-triazine and 4,4'-hexamethylenebis(amino-2,2,6,6-tetramethylpiperidine), polycondensation product of 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid, polycondensation product of 4,4'-hexamethylenebis-(amino-2,2,6,6-tetra-methylpiperidine) and 1,2-dibromoethane, tetrakis(2,2,6,6-tetramethylpiperidin-4-yl) 1,2,3,4-butanetetracarboxylate, tetrakis(1,2,2,6,6-pentamethylpiperidin-4-yl) 1,2,3,4-butanetetracarboxylate, polycondensation product of 2,4-dichloro-6-morpholino-s-triazine and 4,4'-hexamethylenebis(amino-2,2,6,6-tetramethylpiperidine), N,N',N",N"'-tetrakis[(4,6-bis(butyl-1,2,2,6,6-pentamethylpiperidin-4-yl)-amino-s-triazin-2-y I]-1,10-diamino-4,7-diazadecane, mixed (2,2,6,6-tetramethylpiperidin-4-yl/b,b,b',b'-tetramethyl-3,9-(2,4,8 ,10-tetraoxaspiro[5.5]-undecane) diethyl] 1,2,3,4-butanetetracarboxylate, mixed (1,2,2,6,6-pentamethylpiperidin-4-yl/b,b,b',b'-tetramethyl-3,9-(2,4 ,8,10-tetraoxaspiro[5.5]undecane)diethyl] 1,2,3,4-butanetetracarboxylate, octamethylene bis(2,2,6,6-tetramethylpiperidin-4-carboxylate), 4,4'-ethylenebis(2,2,6,6-tetramethylpiperazin-3-one), N-2,2,6,6-tetramethylpiperidin-4-yl-n-dodecylsuccinimide, N-1,2,2,6,6-pentamethylpiperidin-4-yl-n-dodecylsuccinimide, N-1-acetyl-2,2,6,6-tetramethylpiperidin-4-yln-dodecylsuccinimide, 1-acetyl3-dodecyl-7,7,9,9-tetramethyl-1,3,8-triazaspiro[4.5]decane-2,4-dione, di-(1-octyloxy-2,2,6,6-tetramethylpiperidin-4-yl) sebacate, di-(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl) succinate, 1-octyloxy-2,2,6,6-tetramethyl-4-hydroxy-piperidine, poly-{[6-tert-octylamino-s-triazin-2,4-diyl][2-(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl)imino-hexamethylene-[4-(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl)imino], and 2,4,6-tris[N-(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl)-n-butylamino]-s-triazine.
A most preferred hindered amine compound is bis(2,2,6,6-tetramethylpiperidin-4-yl) sebacate, bis(1,2,2,6,6-pentamethylpiperidin-4-yl) sebacate, di(1,2,2,6,6-pentamethylpiperidin-4-yl) (3,5-di-tert-butyl-4-hydroxybenzyl)butylmalonate, the polycondensation product of 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid, the polycondensation product of 2,4-dichloro-6-tert-octylamino-s-triazine and 4,4'-hexamethylenebis(amino-2,2,6,6-tetramethylpiperidine), N,N',N",N"'-tetrakis[(4,6-bis(butyl-(1,2,2,6,6-pentamethylpiperidin-4-yl)amino)- s-triazine-2-yl]-1,10-diamino-4,7-diazadecane. di-(1-octyloxy-2,2,6,6-tetramethylpiperidin-4-yl) sebacate, di-(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl) succinate, 1-octyloxy-2,2,6,6-tetramethyl-4-hydroxy-piperidine, poly-{[6-tert-octylamino-s-triazin-2,4-diyl][2-(1-cyclohexyloxy-2,2,6,6-tetramethyl-piperidin-4-yl)imino-hexamethylene-[4-(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl)imino], or 2,4,6-tris[N-(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl)-n-butylamino]-s-triazine.
The instant composition can additionally contain another UV absorber selected from the group consisting of the benzotriazoles, the s-triazines, hydroxy-benzophenones, the a-cyanoacrylates, the oxanilides and benzoates.
Particularly, the instant composition may additionally contain an effective stabilizing amount of at least one other 2-hydroxyphenyl-2H-benzotriazole; another tris-aryl-s-triazine; or hindered amine or mixtures thereof.
Preferably, the 2-hydroxyphenyl-2H-benzotriazole is selected from the group consisting of 2-(2-hydroxy-3,5-di-tert-amylphenyl)-2H-benzotriazole;
2-[2-hydroxy-3,5-di(a,a-dimethylbenzyl)phenyl]-2H-benzotriazole;
2-[2-hydroxy-3-(a,a-dimethylbenzyl)-5-tert-octylphenyl]-2H-benzotriazole;
2-{2-hydroxy-3-tert-butyl-5-[2-(omega-hydroxy-octa(ethyleneoxy)carbonyl)ethyl]-phenyl}-2H-benzotriazole;
5-chloro-2-(2-hydroxy-3,5-di-tert-butylphenyl)-2H-benzotriazole;
5-chloro-2-(2-hydroxy-3-tert-butyl-5-methylphenyl)-2H-benzotriazole;
2-(2-hydroxy-5-tert-octylphenyl)-2H-benzotriazole; and 2-{2-hydroxy-3-tert-butyl-5-[2-(octyloxy)carbonyl)ethyl]phenyl}-2H-benzotriazole.
Preferably, the other tris-aryl-s-triazine is selected from the group consisting of 2,4-bis(2,4-dimethylphenyl)-6-(2-hydroxy-4-octyloxyphenyl)-s-triazine;
2,4-diphenyl-6-(2-hydroxy-4-hexyloxyphenyl)-s-triazine;
2,4-bis(2,4-dimethylphenyl)-6-[2-hydroxy-4-(3-do-/tri-decyloxy-2-hydroxypropoxy) phenyl]-s-triazine; and 2-(2-hydroxyethylamino)-4,6-bis[N-butyl-N-(1-cyclohexyloxy-2,2,6,6-tetramethyl piperidin-4-yl)amino]-s-triazine.
The instant composition can additionally contain an effective stabilizing amount of a hindered amine.
The alkyd resin lacquers which can be stabilized against the action of light and moisture in accordance with the instant invention are the conventional stoving lacquers which are used in particular for coating automobiles (automobile finishing lacquers), for example lacquers based on alkyd/melamine resins and alkyd/acrylic/melamine resins (see H.
Wagner and H.
F. Sarx, "Lackkunstharze" (1977), pages 99-123). Other crosslinking agents include glycouril resins, blocked isocyanates or epoxy resins.
The lacquers stabilized in accordance with the invention are suitable both for metal finish coatings and solid shade finishes, especially in the case of retouching finishes, as well as various coil coating applications. The lacquers stabilized in accordance with the invention are preferably applied in the conventional manner by two methods, either by the single-coat method or by the two-coat method. In the latter method, the pigment-containing base coat is applied first and then a covering coat of clear lacquer over it.
It is also to be noted that the compounds of the present invention are applicable for use in non-acid catalyzed thermoset resins such as epoxy, epoxy-polyester, vinyl, alkyd, acrylic and polyester resins, optionally modified with silicon, isocyanates or isocyanurates. The epoxy and epoxy-polyester resins are crosslinked with conventional crosslinkers such as acids, acid anhydrides, amines and the like. Correspondingly, the epoxide may be utilized as the crosslinking agent for various acrylic or polyester resin systems that have been modified by the presence of reactive groups on the backbone structure.
When used in two-coat finishes, the compounds of the instant invention can be incorporated in the clear coat or both in the clear coat and in the pigmented base coat.
When water-soluble, water miscible or water dispersible coating are desired ammonium salts of acid groups present in the resin are formed. Powder coating composition can be prepared by reacting glycidyl methacrylate with selected alcohol components.
The instant benzotriazoles are made by conventional methods for preparing such compounds. The usual procedure involves the diazotization of a substituted o-nitroaniline followed by coupling the resultant diazonium salt with a substituted phenol and reduction of the azobenzene intermediate to the corresponding desired benzotriazole. The starting materials for these benzotriazoles are largely items of commerce or can be prepared by normal methods of organic synthesis.
While the instant benzotriazoles with their enhanced durability are particularly suited for automotive coating applications, it is contemplated that they will also be espeically useful in other applications where their enhanced durability is required such as in solar films and the like.
The phenolic antioxidant of particular interest is selected from the group consisting of n-octadecyl 3,5-di-tert-butyl-4-hydroxyhydrocinnamate, neopentanetetrayl tetrakis(3,5-di-tert-butyl-4-hydroxyhydrocinammate), di-n-octadecyl 3,5-di-tert-butyl-4-hydroxybenzylphosphonate, 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate, thiodiethylene bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamate), 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene, 3,6-dioxaoctamethylene bis(3-methyl-5-tert-butyl-4-hydroxyhydrocinnamate), 2,6-di-tert-butyl-p-cresol, 2,2'-ethylidene-bis(4,6-di-tert-butylphenol), 1,3,5-tris(2,6-dimethyl-4-tert-butyl-3-hydroxybenzyl)isocynurate, 1,1,3,-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane, 1,3,5-tris[2-(3,5-di-tert-butyl-4-hydroxyhydrocinnamoyloxy)ethyl]isocyanur ate, 3,5-di-(3,5-di-tert-butyl-4-hydroxybenzyl)mesitol, hexamethylene bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamate), 1-(3,5-di-tert-butyl-4-hydroxyanilino)-3,5-di(octylthio)-s-triazine, N,N'-hexamethylene-bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamamide), calcium bis(ethyl 3,5-di-tert-butyl-4-hydroxybenzyl-phosphonate), ethylene bis[3,3-di(3-tert-butyl-4-hydroxyphenyl)butyrate], octyl 3,5-di-tert-butyl-4-hydroxybenzylmercaptoacetate, bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamoyl)hydrazide, and N,N'-bis[2-(3,5-di-tert-butyl-4-hydroxyhydrocinnamoyloxy)-eth yl]-oxamide.
A most preferred phenolic antioxidant is neopentanetetrayl tetrakis(3,5-di-tert-butyl-4-hydroxyhydrocinnamate), n-octadecyl 3,5-di-tert-butyl-4-hydroxyhydrocinnamate, 1,3,5-tri-methyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene, 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate, 2,6-di-tert-butyl-p-cresol or 2,2'-ethylidene-bis(4,6-di-tert-butylphenol).
The hindered amine compound of particular interest is selected from the group consisting of bis(2,2,6,6-tetramethylpiperidin-4-yl) sebacate, bis(1,2,2,6,6-pentamethylpiperidin-4-yl) sebacate, di(1,2,2,6,6-pentamethylpiperidin-4-yl) (3,5-di-tert-butyl-4-hydroxybenzyl)butylmalonate, 4-benzoyl-2,2,6,6-tetramethylpiperidine, 4-stearyloxy-2,2,6,6-tetramethylpiperidine, 3-n-octyl-7,7,9,9-tetramethyl-1,3,8-triaza-spiro[4.5]decane-2,4-dio ne, tris(2,2,6,6-tetramethylpiperidin-4-yl) nitrilotriacetate, 1,2-bis(2,2,6,6-tetramethyl-3-oxopiperazin-4-yl)ethane, 2,2,4,4-tetramethyl-7-oxa-3,20-diaza-21-oxodispiro[5.1.11.2] heneicosane, polycondensation product of 2,4-dichloro-6-tert-octylamino-s-triazine and 4,4'-hexamethylenebis(amino-2,2,6,6-tetramethylpiperidine), polycondensation product of 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid, polycondensation product of 4,4'-hexamethylenebis-(amino-2,2,6,6-tetra-methylpiperidine) and 1,2-dibromoethane, tetrakis(2,2,6,6-tetramethylpiperidin-4-yl) 1,2,3,4-butanetetracarboxylate, tetrakis(1,2,2,6,6-pentamethylpiperidin-4-yl) 1,2,3,4-butanetetracarboxylate, polycondensation product of 2,4-dichloro-6-morpholino-s-triazine and 4,4'-hexamethylenebis(amino-2,2,6,6-tetramethylpiperidine), N,N',N",N"'-tetrakis[(4,6-bis(butyl-1,2,2,6,6-pentamethylpiperidin-4-yl)-amino-s-triazin-2-y I]-1,10-diamino-4,7-diazadecane, mixed (2,2,6,6-tetramethylpiperidin-4-yl/b,b,b',b'-tetramethyl-3,9-(2,4,8 ,10-tetraoxaspiro[5.5]-undecane) diethyl] 1,2,3,4-butanetetracarboxylate, mixed (1,2,2,6,6-pentamethylpiperidin-4-yl/b,b,b',b'-tetramethyl-3,9-(2,4 ,8,10-tetraoxaspiro[5.5]undecane)diethyl] 1,2,3,4-butanetetracarboxylate, octamethylene bis(2,2,6,6-tetramethylpiperidin-4-carboxylate), 4,4'-ethylenebis(2,2,6,6-tetramethylpiperazin-3-one), N-2,2,6,6-tetramethylpiperidin-4-yl-n-dodecylsuccinimide, N-1,2,2,6,6-pentamethylpiperidin-4-yl-n-dodecylsuccinimide, N-1-acetyl-2,2,6,6-tetramethylpiperidin-4-yln-dodecylsuccinimide, 1-acetyl3-dodecyl-7,7,9,9-tetramethyl-1,3,8-triazaspiro[4.5]decane-2,4-dione, di-(1-octyloxy-2,2,6,6-tetramethylpiperidin-4-yl) sebacate, di-(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl) succinate, 1-octyloxy-2,2,6,6-tetramethyl-4-hydroxy-piperidine, poly-{[6-tert-octylamino-s-triazin-2,4-diyl][2-(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl)imino-hexamethylene-[4-(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl)imino], and 2,4,6-tris[N-(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl)-n-butylamino]-s-triazine.
A most preferred hindered amine compound is bis(2,2,6,6-tetramethylpiperidin-4-yl) sebacate, bis(1,2,2,6,6-pentamethylpiperidin-4-yl) sebacate, di(1,2,2,6,6-pentamethylpiperidin-4-yl) (3,5-di-tert-butyl-4-hydroxybenzyl)butylmalonate, the polycondensation product of 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid, the polycondensation product of 2,4-dichloro-6-tert-octylamino-s-triazine and 4,4'-hexamethylenebis(amino-2,2,6,6-tetramethylpiperidine), N,N',N",N"'-tetrakis[(4,6-bis(butyl-(1,2,2,6,6-pentamethylpiperidin-4-yl)amino)- s-triazine-2-yl]-1,10-diamino-4,7-diazadecane. di-(1-octyloxy-2,2,6,6-tetramethylpiperidin-4-yl) sebacate, di-(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl) succinate, 1-octyloxy-2,2,6,6-tetramethyl-4-hydroxy-piperidine, poly-{[6-tert-octylamino-s-triazin-2,4-diyl][2-(1-cyclohexyloxy-2,2,6,6-tetramethyl-piperidin-4-yl)imino-hexamethylene-[4-(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl)imino], or 2,4,6-tris[N-(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl)-n-butylamino]-s-triazine.
The instant composition can additionally contain another UV absorber selected from the group consisting of the benzotriazoles, the s-triazines, hydroxy-benzophenones, the a-cyanoacrylates, the oxanilides and benzoates.
Particularly, the instant composition may additionally contain an effective stabilizing amount of at least one other 2-hydroxyphenyl-2H-benzotriazole; another tris-aryl-s-triazine; or hindered amine or mixtures thereof.
Preferably, the 2-hydroxyphenyl-2H-benzotriazole is selected from the group consisting of 2-(2-hydroxy-3,5-di-tert-amylphenyl)-2H-benzotriazole;
2-[2-hydroxy-3,5-di(a,a-dimethylbenzyl)phenyl]-2H-benzotriazole;
2-[2-hydroxy-3-(a,a-dimethylbenzyl)-5-tert-octylphenyl]-2H-benzotriazole;
2-{2-hydroxy-3-tert-butyl-5-[2-(omega-hydroxy-octa(ethyleneoxy)carbonyl)ethyl]-phenyl}-2H-benzotriazole;
5-chloro-2-(2-hydroxy-3,5-di-tert-butylphenyl)-2H-benzotriazole;
5-chloro-2-(2-hydroxy-3-tert-butyl-5-methylphenyl)-2H-benzotriazole;
2-(2-hydroxy-5-tert-octylphenyl)-2H-benzotriazole; and 2-{2-hydroxy-3-tert-butyl-5-[2-(octyloxy)carbonyl)ethyl]phenyl}-2H-benzotriazole.
Preferably, the other tris-aryl-s-triazine is selected from the group consisting of 2,4-bis(2,4-dimethylphenyl)-6-(2-hydroxy-4-octyloxyphenyl)-s-triazine;
2,4-diphenyl-6-(2-hydroxy-4-hexyloxyphenyl)-s-triazine;
2,4-bis(2,4-dimethylphenyl)-6-[2-hydroxy-4-(3-do-/tri-decyloxy-2-hydroxypropoxy) phenyl]-s-triazine; and 2-(2-hydroxyethylamino)-4,6-bis[N-butyl-N-(1-cyclohexyloxy-2,2,6,6-tetramethyl piperidin-4-yl)amino]-s-triazine.
The instant composition can additionally contain an effective stabilizing amount of a hindered amine.
The alkyd resin lacquers which can be stabilized against the action of light and moisture in accordance with the instant invention are the conventional stoving lacquers which are used in particular for coating automobiles (automobile finishing lacquers), for example lacquers based on alkyd/melamine resins and alkyd/acrylic/melamine resins (see H.
Wagner and H.
F. Sarx, "Lackkunstharze" (1977), pages 99-123). Other crosslinking agents include glycouril resins, blocked isocyanates or epoxy resins.
The lacquers stabilized in accordance with the invention are suitable both for metal finish coatings and solid shade finishes, especially in the case of retouching finishes, as well as various coil coating applications. The lacquers stabilized in accordance with the invention are preferably applied in the conventional manner by two methods, either by the single-coat method or by the two-coat method. In the latter method, the pigment-containing base coat is applied first and then a covering coat of clear lacquer over it.
It is also to be noted that the compounds of the present invention are applicable for use in non-acid catalyzed thermoset resins such as epoxy, epoxy-polyester, vinyl, alkyd, acrylic and polyester resins, optionally modified with silicon, isocyanates or isocyanurates. The epoxy and epoxy-polyester resins are crosslinked with conventional crosslinkers such as acids, acid anhydrides, amines and the like. Correspondingly, the epoxide may be utilized as the crosslinking agent for various acrylic or polyester resin systems that have been modified by the presence of reactive groups on the backbone structure.
When used in two-coat finishes, the compounds of the instant invention can be incorporated in the clear coat or both in the clear coat and in the pigmented base coat.
When water-soluble, water miscible or water dispersible coating are desired ammonium salts of acid groups present in the resin are formed. Powder coating composition can be prepared by reacting glycidyl methacrylate with selected alcohol components.
The instant benzotriazoles are made by conventional methods for preparing such compounds. The usual procedure involves the diazotization of a substituted o-nitroaniline followed by coupling the resultant diazonium salt with a substituted phenol and reduction of the azobenzene intermediate to the corresponding desired benzotriazole. The starting materials for these benzotriazoles are largely items of commerce or can be prepared by normal methods of organic synthesis.
While the instant benzotriazoles with their enhanced durability are particularly suited for automotive coating applications, it is contemplated that they will also be espeically useful in other applications where their enhanced durability is required such as in solar films and the like.
Consequently a further subject of the invention is the use of a compound of formula I, III or IV for stabilizing an organic material against thermal, oxidative or light induced degradation.
The following examples illustrate the invention.
General~rocedure for making the compounds A) 5-Trifluoromethyl-2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole a. Diazotization of 4-amino-3-vitro-benzotrifluoride To a 500 ml 3-necked flask, equipped with a mechanical stirrer, are added 41.2 g of 4-amino-3-vitro-benzotrifluoride, 52 ml of concentrated hydrochloride acid and 100 ml of distilled water. The stirred solution is cooled to 5°C and 17.3 g of sodium nitrite dissolved in 50 ml of water are added. The solution is stirred at 0 to 5°C for two hours, then filtered and stored at -10°C.
b. Monoazo adduct To a 1000 ml flask, fitted with a mechanical stirrer, are added 40 g of sodium hydroxide dissolved in 200 ml of methanol and 32.4 g of 2-a-cumyl-4-tert-octylphenol in 50 ml of xylene. The solution is cooled to 5°C and the diazo solution of 4-amino-vitro-benzo-trifluoride prepared in part a. is added at 0 to 5°C over a two-hour period. Then 100 ml of xylene are added and the organic layer is washed with water, aqueous hydrochloride acid, water, aqueous sodium bicarbonate solution and finally water. The solvent is removed under reduced pressure and the residue is purified by chromatography (silica gel, heptane:ethyl acetate 95:5) to yield 42.1 g of the adduct product as a dark red paste.
c. Reduction of the monoazo adduct A 1000 ml flask is charged with 20 g of sodium hydroxide, 40 ml of water, 42.1 g of the monoazo adduct prepared in part b. and 400 ml of ethanol. The mixture is warmed to 80°C
and 27 g of formamidine sulfinic acid is added in portions with stirring.
After 1.5 hours, the solution is cooled to room temperature and 100 ml of water are added. The pH
is adjusted to pH 7 with concentrated hydrochloric acid. The ethanol is removed under vacuum and the water layer is extracted with methylene chloride. The solvent is then evaporated in vacuo and the residue is purified by chromatography (silica gel, heptaneaolunen 9:1 ) and crystallized from ethanol. The title compound is obtained in a yield of 5.6 g as a pale yellow solid melting at 119-121 °C.
Example 3 intermediate for example 4) 2-[2-Hydroxy-3-(di-n-butylaminomethyl)-5-tert-octylphenyl]-2H-benzotriazole 2-[2-Hydroxy-5-tert-octylphenyl]-2H-benzotriazole (30 g, 0.092 mol), paraformaldehyde (3 g, 0.0955 mol) and di-n-butylamine (24.9 g, 0.191 mol) are charged to a pressure reaction at ambient temperature. The reactor is sealed and the temperature raised to 160°C. The reaction mass is held at 160°C for four hours and then discharged. The reactor is rinsed with toluene. The toluene, amine and water are stripped by rotary evaporation. The crude product is prepared in a 96% yield (40 g). This product is chromatographed on silica gel using a heptane/ethyl acetate gradient as eluent to remove a trace of unreacted starting benzotriazole intermediate. The title compound is a yellow oil whose structure is confirmed by'Hnmr.
Example 4 Methylene-[2-(4-tert-octyl-6-2H-benzotriazol-2-yl)phenol]
{2'-[4-tert-octyl-6-(5-trifluoromethyl)-2H-benzotriazol-2-yl}phenol}
Trifluoromethyl-2-(2-hydroxy-5-tert-octylphenyl)-2H-benzotriazole (10 g, 0.025 mol, as prepared in Example 38 of GB 2,319,035A), sodium methoxide (1.49 g, 0.026 mol) and xylenes (20 g, 0.187 mol) are added to a reaction flask which is then heated to 160°C. The compound prepared in Example 3 (11.75 g, 0.0253 mol) dissolved in 11.8 g of xylenes is dripped into the reaction mass over a one-hour period. At the end of the addition, the reaction mass is heated to 205°C while distilling off xylene, methanol and di-n-butylamine.
The following examples illustrate the invention.
General~rocedure for making the compounds A) 5-Trifluoromethyl-2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole a. Diazotization of 4-amino-3-vitro-benzotrifluoride To a 500 ml 3-necked flask, equipped with a mechanical stirrer, are added 41.2 g of 4-amino-3-vitro-benzotrifluoride, 52 ml of concentrated hydrochloride acid and 100 ml of distilled water. The stirred solution is cooled to 5°C and 17.3 g of sodium nitrite dissolved in 50 ml of water are added. The solution is stirred at 0 to 5°C for two hours, then filtered and stored at -10°C.
b. Monoazo adduct To a 1000 ml flask, fitted with a mechanical stirrer, are added 40 g of sodium hydroxide dissolved in 200 ml of methanol and 32.4 g of 2-a-cumyl-4-tert-octylphenol in 50 ml of xylene. The solution is cooled to 5°C and the diazo solution of 4-amino-vitro-benzo-trifluoride prepared in part a. is added at 0 to 5°C over a two-hour period. Then 100 ml of xylene are added and the organic layer is washed with water, aqueous hydrochloride acid, water, aqueous sodium bicarbonate solution and finally water. The solvent is removed under reduced pressure and the residue is purified by chromatography (silica gel, heptane:ethyl acetate 95:5) to yield 42.1 g of the adduct product as a dark red paste.
c. Reduction of the monoazo adduct A 1000 ml flask is charged with 20 g of sodium hydroxide, 40 ml of water, 42.1 g of the monoazo adduct prepared in part b. and 400 ml of ethanol. The mixture is warmed to 80°C
and 27 g of formamidine sulfinic acid is added in portions with stirring.
After 1.5 hours, the solution is cooled to room temperature and 100 ml of water are added. The pH
is adjusted to pH 7 with concentrated hydrochloric acid. The ethanol is removed under vacuum and the water layer is extracted with methylene chloride. The solvent is then evaporated in vacuo and the residue is purified by chromatography (silica gel, heptaneaolunen 9:1 ) and crystallized from ethanol. The title compound is obtained in a yield of 5.6 g as a pale yellow solid melting at 119-121 °C.
Example 3 intermediate for example 4) 2-[2-Hydroxy-3-(di-n-butylaminomethyl)-5-tert-octylphenyl]-2H-benzotriazole 2-[2-Hydroxy-5-tert-octylphenyl]-2H-benzotriazole (30 g, 0.092 mol), paraformaldehyde (3 g, 0.0955 mol) and di-n-butylamine (24.9 g, 0.191 mol) are charged to a pressure reaction at ambient temperature. The reactor is sealed and the temperature raised to 160°C. The reaction mass is held at 160°C for four hours and then discharged. The reactor is rinsed with toluene. The toluene, amine and water are stripped by rotary evaporation. The crude product is prepared in a 96% yield (40 g). This product is chromatographed on silica gel using a heptane/ethyl acetate gradient as eluent to remove a trace of unreacted starting benzotriazole intermediate. The title compound is a yellow oil whose structure is confirmed by'Hnmr.
Example 4 Methylene-[2-(4-tert-octyl-6-2H-benzotriazol-2-yl)phenol]
{2'-[4-tert-octyl-6-(5-trifluoromethyl)-2H-benzotriazol-2-yl}phenol}
Trifluoromethyl-2-(2-hydroxy-5-tert-octylphenyl)-2H-benzotriazole (10 g, 0.025 mol, as prepared in Example 38 of GB 2,319,035A), sodium methoxide (1.49 g, 0.026 mol) and xylenes (20 g, 0.187 mol) are added to a reaction flask which is then heated to 160°C. The compound prepared in Example 3 (11.75 g, 0.0253 mol) dissolved in 11.8 g of xylenes is dripped into the reaction mass over a one-hour period. At the end of the addition, the reaction mass is heated to 205°C while distilling off xylene, methanol and di-n-butylamine.
After one hour at 205°C, the reaction mass is subjected to a 26" Hg vacuum for three hours.
After the vacuum is released, the reaction mass is cooled to 100°C and 100 g of heptane is charged. The solution is then washed with 50 g of 10% aqueous hydrochloric acid followed by 50 g of water. The heptane is dried and the product is crystallized and isolated by filtration. After washing the filter cake with heptane, the product is dried to constant weight in vacuo. The title compound is obtained as a solid (16 g, 87% yield) melting at 163-166°C.
Analysis:
Mass spectrometry: 727 (M+H);
'Hnmr (CDCI3): 8 0.71 (s, 9H), 0.72 (s, 9H), 1.40 (s, 6H), 1.41 (s, 6H) 1.74 (s, 2H), 1.75 (s, 2H), 4.31 (s, 2H), 7.38 (d, 1 H), 7.42 (d, 1 H), 7.48 (complex, 2H), 7.68 (dd, 1 H), 7.95 (complex, 2H), 8.08 (d, 1 H), 8.29-8.33 (3d, 3H), 11.54 (s, 1 H) Example 5 Methyl 3-(Trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate The general procedure of A), parts a and b, is followed to prepare the unisolated, solid, monoazo intermediate of the title compound from 62.5 g of 4-amino-3-nitrobenzotrifluoride (_ 4-trifluoromethyl-o-nitroaniline).
The monoazo intermediate (84 g, 0.19 mol), xylenes (116 g, 1.08 mol), diethylamine (100 g, 1.4 mol) and 5% palladium on charcoal (0.5 g, 50% assay) are charged to a reactor.
Hydrazine (27.4 g, 0.56 mol) is dripped in over a two-hour period at a temperature range of 15-45°C. After the addition is complete, the temperature is raised to 80°C and held there for three hours. The reaction is judged complete by thin layer chromatography. The catalyst is removed by filtration and the solvent removed in vacuo to yield 36 grams of the product.
After recrystallization from methanol, the title compound is obtained as light yellow needles melting at 105-107°C.
Analysis:
Mass spectrometry: 422 (M+H);
After the vacuum is released, the reaction mass is cooled to 100°C and 100 g of heptane is charged. The solution is then washed with 50 g of 10% aqueous hydrochloric acid followed by 50 g of water. The heptane is dried and the product is crystallized and isolated by filtration. After washing the filter cake with heptane, the product is dried to constant weight in vacuo. The title compound is obtained as a solid (16 g, 87% yield) melting at 163-166°C.
Analysis:
Mass spectrometry: 727 (M+H);
'Hnmr (CDCI3): 8 0.71 (s, 9H), 0.72 (s, 9H), 1.40 (s, 6H), 1.41 (s, 6H) 1.74 (s, 2H), 1.75 (s, 2H), 4.31 (s, 2H), 7.38 (d, 1 H), 7.42 (d, 1 H), 7.48 (complex, 2H), 7.68 (dd, 1 H), 7.95 (complex, 2H), 8.08 (d, 1 H), 8.29-8.33 (3d, 3H), 11.54 (s, 1 H) Example 5 Methyl 3-(Trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate The general procedure of A), parts a and b, is followed to prepare the unisolated, solid, monoazo intermediate of the title compound from 62.5 g of 4-amino-3-nitrobenzotrifluoride (_ 4-trifluoromethyl-o-nitroaniline).
The monoazo intermediate (84 g, 0.19 mol), xylenes (116 g, 1.08 mol), diethylamine (100 g, 1.4 mol) and 5% palladium on charcoal (0.5 g, 50% assay) are charged to a reactor.
Hydrazine (27.4 g, 0.56 mol) is dripped in over a two-hour period at a temperature range of 15-45°C. After the addition is complete, the temperature is raised to 80°C and held there for three hours. The reaction is judged complete by thin layer chromatography. The catalyst is removed by filtration and the solvent removed in vacuo to yield 36 grams of the product.
After recrystallization from methanol, the title compound is obtained as light yellow needles melting at 105-107°C.
Analysis:
Mass spectrometry: 422 (M+H);
'Hnmr (CDCI3): 8 1.51 (s, 9H), 2.71 (t, 2H), 3.02 (t, 2H), 3.71 (s, 3H), 7.26 (d, 1H), 7.69 (dd, 1 H), 8.07 (d, 1 H), 8.17 (d, 1 H), 11.55 (s, 1 H) Example 6 3-(5-Trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamic Acid The ester prepared in Example 5 (36 g, 0.088 mol), sodium hydroxide (16.4 g, 0.41 mol), N-methylpyrrolidone (12 g, 0.12 mol) and water (400 g) are charged to a reactor and heated to 100°C. The solution is refluxed for three hours after which the reaction mass is poured into 500 g of 10% aqueous hydrochloric acid. The solids are removed by filtration, washed with water and dried to a constant weight to give 31.6 g of product.
This material is recrystallized from toluene/acetone to give the title compound as a light yellow solid melting at 166°C.
Analysis:
Mass spectrometry: 406 (M-H);
'Hnmr (CDC13): 8 1.50 (s, 9H), 2.78 (t, 2H), 3.04 (t, 2H), 7.26 (d, 1H), 7.65 (dd, 1H), 8.07 (d, 1 H), 8.18 (d, 1 H), 8.31 (d, 1 H), 11.58 (s, 1 H) Example 7 Isooctyl 3-(Trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate The acid prepared in Example 6 (8 g, 0.02 mol), EXXAL~ 8 (isooctanol isomers, Exxon, 5 g, 0.038 mol), p-toluenesulfonic acid hydrate (0.5 g, 0.0026 mol) and xylenes (100 mL) are charged to a reactor and refluxed for six hours. TLC shows when the reaction is complete. The solvent is removed and the resulting oil is chromatographed on silical gel. The title compound is obtained in 99.5% yield as a light yellow oil.
Analysis:
Mass spectrometry: 520 (M+H);
This material is recrystallized from toluene/acetone to give the title compound as a light yellow solid melting at 166°C.
Analysis:
Mass spectrometry: 406 (M-H);
'Hnmr (CDC13): 8 1.50 (s, 9H), 2.78 (t, 2H), 3.04 (t, 2H), 7.26 (d, 1H), 7.65 (dd, 1H), 8.07 (d, 1 H), 8.18 (d, 1 H), 8.31 (d, 1 H), 11.58 (s, 1 H) Example 7 Isooctyl 3-(Trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate The acid prepared in Example 6 (8 g, 0.02 mol), EXXAL~ 8 (isooctanol isomers, Exxon, 5 g, 0.038 mol), p-toluenesulfonic acid hydrate (0.5 g, 0.0026 mol) and xylenes (100 mL) are charged to a reactor and refluxed for six hours. TLC shows when the reaction is complete. The solvent is removed and the resulting oil is chromatographed on silical gel. The title compound is obtained in 99.5% yield as a light yellow oil.
Analysis:
Mass spectrometry: 520 (M+H);
'Hnmr (CDCI3): 8 0.73-1.79 (broad complex, 15H), 1.51 (s, 9H), 2.71 (t, 2H), 3.02 (t, 2H), 4.10 (complex, 2H), 7.27 (d, 1 H), 7.69 (dd, 1 H), 8.08 (d, 1 H), 8.18 (d, 1 H), 8.30 (s, 1 H), 11.55 (s, 1 H) Example 8 5-Trifluoromethyl-2-(2-hydroxy-3,5-di-tert-octylphenyl)-2H-benzotriazole Following the general procedure of A) 1, 62.5 g of 4-amino-3-nitrobenzotrifluoride is used to make 42.5 g of the title compound which is obtained as yellow crystals melting at 100.5-101.5°C.
Analysis:
'Hnmr (CDCI3): b 0.79 (s, 18H), 1.45 (s, 9H), 1.54 (s, 3H), 1.56 (s, 3H), 1.82 (s, 2H), 2.12 (s, 2H), 7.44 (d, 1 H), 7.66 (dd, 1 H), 8.10 (d, 1 H), 8.30 (s, 1 H), 8.32 (s, 1 H), 11.55 (s, 1 H) Example 9 5-Trifluoromethyl-2-(2-hydroxy-3-allyl-5-tert-octyl phenyl)-2H-benzotriazole The compound prepared in Example 38 of GB 2,319,035A (13.01 g, 0.033 mol), potassium hydroxide (2.37 g, 0.036 mol) and ethanol (60 mL) are charged to a reactor and stirred at ambient temperature for two hours. Allyl bromide (4.84 g, 0.039 mol) and potassium iodide (0.34 g, 0.002 mol) are added to the reaction mixture which is heated to 85°C. After holding at 85°C for 4.5 hours, the solvent is removed and replaced with 100 mL
of heptane. The mixture is washed thrice with 40 mL of water. The solvent is then removed to yield 14.2 g of the corresponding O-allyl ether as an off-white solid.
Analysis:
Analysis:
'Hnmr (CDCI3): b 0.79 (s, 18H), 1.45 (s, 9H), 1.54 (s, 3H), 1.56 (s, 3H), 1.82 (s, 2H), 2.12 (s, 2H), 7.44 (d, 1 H), 7.66 (dd, 1 H), 8.10 (d, 1 H), 8.30 (s, 1 H), 8.32 (s, 1 H), 11.55 (s, 1 H) Example 9 5-Trifluoromethyl-2-(2-hydroxy-3-allyl-5-tert-octyl phenyl)-2H-benzotriazole The compound prepared in Example 38 of GB 2,319,035A (13.01 g, 0.033 mol), potassium hydroxide (2.37 g, 0.036 mol) and ethanol (60 mL) are charged to a reactor and stirred at ambient temperature for two hours. Allyl bromide (4.84 g, 0.039 mol) and potassium iodide (0.34 g, 0.002 mol) are added to the reaction mixture which is heated to 85°C. After holding at 85°C for 4.5 hours, the solvent is removed and replaced with 100 mL
of heptane. The mixture is washed thrice with 40 mL of water. The solvent is then removed to yield 14.2 g of the corresponding O-allyl ether as an off-white solid.
Analysis:
'Hnmr (CDC13): 8 0.78 (s, 9H), 1.41 (s, 6H), 1.77 (s, 2H), 4.60-4.65 (d, 2H), 5.16-5.34 (m. 2H), 5.86-6.00 (m, 1 H), 7.06-7.11 (d, 1 H), 7.49-7.54 (dd, 1 H), 7.61-7.67 (m, 2H), 8.08-8.12 (d, 1 H), 8.35 (s, 1 H) The O-allyl compound (14.2 g) as prepared above is charged to a reactor and heated to 190-195°C and held at that temperature for five hours. Flash column chromatography with silica gel and ethyl acetate/heptane solvent as eluent to give the title compound in 12.2 g yield as a yellow oil.
Analysis:
Mass spectrometry: 432 (M+H);
'Hnmr (CDCI3): 8 0.78 (s, 9H), 1.46 (s, 6H), 1.81 (s, 2H), 3.53-3.64 (d, 2H), 5.06-5.20 (m, 2H), 6.02-6.18 (m, 1 H), 7.29-7.34 (d, 1 H), 7.66-7.72 (dd, 1 H), 8.05-8.12 (d, 1 H), 8.29-8.35 (m, 2H), 11.17 (s, 1 H) Example 10 2,2'-Methylene-bis[6-(5-pentafluoroethyl-2H-benzotriazol-2-yl)-4-tent-octylphenol]
Following Following a synthetic procedure analogous to examples 3 and 4, the Mannich base of 5-pentafluoroethyl-2-(2-hydroxy-5-tert-octylphenyl)-2H-benzotriazole is prepared and used in situ to produce the title compound.
Examale 11 (comparative experiment) 2-(2-Hydroxy-5-trifluoromethylphenyl)-2H-benzotriazole The title compound is prepared following the general procedure of A) starting with o-nitroaniline and 4-trifluoromethylphenol. Rigorous purification of the crude product on silica gel (heptane/ethyl acetate 4:1 ) followed by recrystallization from heptane yields the title compound as a yellow solid melting at 119-120°C. The structure is confirmed by UV
spectroscopy, mass spectrometry and ' Hnmr.
Analysis:
Mass spectrometry: 432 (M+H);
'Hnmr (CDCI3): 8 0.78 (s, 9H), 1.46 (s, 6H), 1.81 (s, 2H), 3.53-3.64 (d, 2H), 5.06-5.20 (m, 2H), 6.02-6.18 (m, 1 H), 7.29-7.34 (d, 1 H), 7.66-7.72 (dd, 1 H), 8.05-8.12 (d, 1 H), 8.29-8.35 (m, 2H), 11.17 (s, 1 H) Example 10 2,2'-Methylene-bis[6-(5-pentafluoroethyl-2H-benzotriazol-2-yl)-4-tent-octylphenol]
Following Following a synthetic procedure analogous to examples 3 and 4, the Mannich base of 5-pentafluoroethyl-2-(2-hydroxy-5-tert-octylphenyl)-2H-benzotriazole is prepared and used in situ to produce the title compound.
Examale 11 (comparative experiment) 2-(2-Hydroxy-5-trifluoromethylphenyl)-2H-benzotriazole The title compound is prepared following the general procedure of A) starting with o-nitroaniline and 4-trifluoromethylphenol. Rigorous purification of the crude product on silica gel (heptane/ethyl acetate 4:1 ) followed by recrystallization from heptane yields the title compound as a yellow solid melting at 119-120°C. The structure is confirmed by UV
spectroscopy, mass spectrometry and ' Hnmr.
Analysis:
Mass spectrometry: m/z 279;
'Hnmr (300 mHz, CDCI3): 8 7.31 (d, 1 H), 7.54 (m, 2H), 7.61 (dd, 1 H), 7.97 (m, 2H), 8.74 (d, 1 H), 11.75 (s, 1 H) UV Absorption (ethyl acetate) a.max 328, E 20,500 Example 12 5-Trifl uoromethyl-2-[2-hydroxy-3-tert-butyl-5-(3-hydroxypropyl)phenyl]-2H-benzotriazole The title compound is prepared by reacting the ester compound of Example 5 with lithium aluminum hydride according to the procedure of Example 19 of U.S.
Patent No.
5,280,124. The title compound is obtained in 80% yield as a solid melting at 90-91°C.
Example 13 5-Trifl uorom ethyl-2-[2-hyd roxy-3-tert-butyl 5-(3-methacryloyloxypropyl)phenyl]-2H-benzotriazole The title compound is prepared by the reaction of the compound of Example 12 with methacryloyl chloride in the presence of triethylamine in toluene.
Example 14-17 Following the general procedure of Example 12, the following compounds of formula III
are prepared where n is 1, m is 2 and ES is hydroxy.
Example G, Gz E, 14 CI F tert-butyl 15 H CF3 phenyl 16 H CF3 ally) 17 H C2F5 a-cumyl Example 18 5-Trifluoromethyl-2-[2-hydroxy-3-tert-butyl 5-(2-hydroxyethyl)phenyl]-2H-benzotriazole When using the general procedure of A) the 2-a-cumyl-4-tert-octylphenol is replaced by 2-tert-butyl-4-(2-hydroxyethyl)phenol, the title compound is prepared.
Example 19 5-Trifluoromethyl-2-[2-hydroxy 5-(2-hydroxyethyl)phenyl]-2H-benzotriazole When using the general procedure of A) 1, the 2-a-cumyl-4-tert-octylphenol is replaced by 4-(2-hydroxyethyl)phenol, the title compound is prepared.
Example 20 5-Trifluoromethyl-2-(2-hydroxy 3,5-di-tert-butylphenyl)-2H-benzotriazole Using the general procedure of A) 1, 47.1 g of 2,4-di-tert-butyl phenol is used to prepare 14.1 g of the title compound as yellow needles melting at 131-133°C.
Example 21 5-Trifluoromethyl-2-[2-hydroxy-3-tert-butyl-5-(3-aminopropyl)phenyl]-2H-benzotriazole The title compound is prepared by reacting the amide of the acid compound of Example 6 with lithium aluminum hydride dissolved in diethyl ether according to the general procedure of Example 19 of U.S. Patent No. 5,280,124.
Example 22 5-Trifluoromethyl-2-[2-hydroxy-3-tert-butyl-5-(3-methacryloylaminopropyl)phenyl]-2H-benzotriazole The title compound is prepared by the reaction of the compound of Example 21 with methacryloyl chloride in the presence of triethylamine in toluene.
Example 23 Isomeric Mixture of 3-[3-(5-Trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamoyloxy]-2-hydroxypropyl Methacrylate and 2-[3-(5-Trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamoyloxy]-3-hydroxypropyl Methacrylate Following the general procedure of Example 25 of U.S. Patent No. 5,280,124, the title compounds are prepared from the acid compound of instant Example 6 and glycidyl methacrylate in the presence of tetrabutylammonium bromide dissolved in toluene.
Example 24-29 Following the general procedure of Example 23, the following compounds of formula III
are prepared where n is 1, m is 2 and ES is a mixture of -OCH2CHOHCH20COC(CH3)=CH2 and -OCH(CH20H)CH20COC(CH3)=CH2.
Mass spectrometry: m/z 279;
'Hnmr (300 mHz, CDCI3): 8 7.31 (d, 1 H), 7.54 (m, 2H), 7.61 (dd, 1 H), 7.97 (m, 2H), 8.74 (d, 1 H), 11.75 (s, 1 H) UV Absorption (ethyl acetate) a.max 328, E 20,500 Example 12 5-Trifl uoromethyl-2-[2-hydroxy-3-tert-butyl-5-(3-hydroxypropyl)phenyl]-2H-benzotriazole The title compound is prepared by reacting the ester compound of Example 5 with lithium aluminum hydride according to the procedure of Example 19 of U.S.
Patent No.
5,280,124. The title compound is obtained in 80% yield as a solid melting at 90-91°C.
Example 13 5-Trifl uorom ethyl-2-[2-hyd roxy-3-tert-butyl 5-(3-methacryloyloxypropyl)phenyl]-2H-benzotriazole The title compound is prepared by the reaction of the compound of Example 12 with methacryloyl chloride in the presence of triethylamine in toluene.
Example 14-17 Following the general procedure of Example 12, the following compounds of formula III
are prepared where n is 1, m is 2 and ES is hydroxy.
Example G, Gz E, 14 CI F tert-butyl 15 H CF3 phenyl 16 H CF3 ally) 17 H C2F5 a-cumyl Example 18 5-Trifluoromethyl-2-[2-hydroxy-3-tert-butyl 5-(2-hydroxyethyl)phenyl]-2H-benzotriazole When using the general procedure of A) the 2-a-cumyl-4-tert-octylphenol is replaced by 2-tert-butyl-4-(2-hydroxyethyl)phenol, the title compound is prepared.
Example 19 5-Trifluoromethyl-2-[2-hydroxy 5-(2-hydroxyethyl)phenyl]-2H-benzotriazole When using the general procedure of A) 1, the 2-a-cumyl-4-tert-octylphenol is replaced by 4-(2-hydroxyethyl)phenol, the title compound is prepared.
Example 20 5-Trifluoromethyl-2-(2-hydroxy 3,5-di-tert-butylphenyl)-2H-benzotriazole Using the general procedure of A) 1, 47.1 g of 2,4-di-tert-butyl phenol is used to prepare 14.1 g of the title compound as yellow needles melting at 131-133°C.
Example 21 5-Trifluoromethyl-2-[2-hydroxy-3-tert-butyl-5-(3-aminopropyl)phenyl]-2H-benzotriazole The title compound is prepared by reacting the amide of the acid compound of Example 6 with lithium aluminum hydride dissolved in diethyl ether according to the general procedure of Example 19 of U.S. Patent No. 5,280,124.
Example 22 5-Trifluoromethyl-2-[2-hydroxy-3-tert-butyl-5-(3-methacryloylaminopropyl)phenyl]-2H-benzotriazole The title compound is prepared by the reaction of the compound of Example 21 with methacryloyl chloride in the presence of triethylamine in toluene.
Example 23 Isomeric Mixture of 3-[3-(5-Trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamoyloxy]-2-hydroxypropyl Methacrylate and 2-[3-(5-Trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamoyloxy]-3-hydroxypropyl Methacrylate Following the general procedure of Example 25 of U.S. Patent No. 5,280,124, the title compounds are prepared from the acid compound of instant Example 6 and glycidyl methacrylate in the presence of tetrabutylammonium bromide dissolved in toluene.
Example 24-29 Following the general procedure of Example 23, the following compounds of formula III
are prepared where n is 1, m is 2 and ES is a mixture of -OCH2CHOHCH20COC(CH3)=CH2 and -OCH(CH20H)CH20COC(CH3)=CH2.
Exam le G, G2 E~ -24 CI F a-cumyl 25 H C2F5 phenyl 26 H CF3 hydrogen 27 H CF3 cyclohexyl 28 H CF3 tert-octyl 29 H F phenyl Example 30 UV Absorption Data The following table demonstrates the enhanced absorption of the compounds of the instant invention for wavelengths above 350 nm. While the ~, max of the instant compounds is not always significantly shifted relative to the unsubstituted benzotriazoles, the absorbance is much greater as seen by the absorbance at ~, max. In the following examples the absorbance at 375 nm is reported for 20 mg/I concentrations. This is not the molar extinction value.
Compound* 7~ max nm E C~3 ~, Absorbance ~ 375 max nm A 345 16,500 0.28 B 362 17, 300 0.50 C 359 14,100 0.42 D 348 15,000 0.35 E 358 15,700 0.42 F 328 20,700 0.03 G 351 13,488 0.43 H 354 12,494 0.36 *A is 2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
B is 5-phenylsulfonyl-2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
C is 5-butylsulfonyl-2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
D is 5-trifluoromethyl-2-(2-hydroxy-3-a-cumyl-5-tent-octylphenyl)-2H-benzotriazole.
E is 5-carbomethoxy-2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
F is 2-(2-hydroxy-5-trifluoromethylphenyl)-2H-benzotriazole.
G is 5-trifluoromethyl-2-(2-hydroxy-3,5-di-tert-butylphenyl)-2H-benzotriazole.
H is isooctyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate.
It is noted that compound F, prepared in Example 11, is closely related to the compounds disclosed in Japanese Sho 47-15210 and has poor red region absorbance. This is an unwanted property for the UV absorbers where absorbance in the upper regions (above 350 nm) of the UV spectra are of vital importance.
Example 31 Yellowness Color Data The following examples show the difference in color between some of the instant compounds as measured by a Macbeth Color-Eye instrument at a concentration of mg/100 mL in butyl acetate. This shows the relative color of the benzotriazoles having various substituents in the 5-position of the benzo ring and in the 3- and 5-positions of the phenyl ring. In the table, the compounds are listed by increasing b value. The instrument measures yellowness as b and DE is the corresponding Yellowness Index value.
Compound* 7~ max nm E C~3 ~, Absorbance ~ 375 max nm A 345 16,500 0.28 B 362 17, 300 0.50 C 359 14,100 0.42 D 348 15,000 0.35 E 358 15,700 0.42 F 328 20,700 0.03 G 351 13,488 0.43 H 354 12,494 0.36 *A is 2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
B is 5-phenylsulfonyl-2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
C is 5-butylsulfonyl-2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
D is 5-trifluoromethyl-2-(2-hydroxy-3-a-cumyl-5-tent-octylphenyl)-2H-benzotriazole.
E is 5-carbomethoxy-2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
F is 2-(2-hydroxy-5-trifluoromethylphenyl)-2H-benzotriazole.
G is 5-trifluoromethyl-2-(2-hydroxy-3,5-di-tert-butylphenyl)-2H-benzotriazole.
H is isooctyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate.
It is noted that compound F, prepared in Example 11, is closely related to the compounds disclosed in Japanese Sho 47-15210 and has poor red region absorbance. This is an unwanted property for the UV absorbers where absorbance in the upper regions (above 350 nm) of the UV spectra are of vital importance.
Example 31 Yellowness Color Data The following examples show the difference in color between some of the instant compounds as measured by a Macbeth Color-Eye instrument at a concentration of mg/100 mL in butyl acetate. This shows the relative color of the benzotriazoles having various substituents in the 5-position of the benzo ring and in the 3- and 5-positions of the phenyl ring. In the table, the compounds are listed by increasing b value. The instrument measures yellowness as b and DE is the corresponding Yellowness Index value.
Compound* b DE
A -0.02 0.07 H 0.54 0.72 D 1.05 1.28 E 1.85 2.25 C 2.84 3.35 B 3.75 4.42 *A is 2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
B is 5-phenylsulfonyl-2-(2-hydroxy-3-a-cumyl-5-tent-octylphenyl)-2H-benzotriazole.
C is 5-butylsulfonyl-2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
D is 5-trifluoromethyl-2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
E is 5-carbomethoxy-2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
H is isooctyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate.
The compounds similarly substituted on the benzo ring by an electron withdrawing group, but not having an a-cumyl moiety in the 3-position of the phenyl ring have better color than the compounds having an a-cumyl group at that position.
Example 32 Yellowness Color Data The following example shows the lower color in a polymer resin composition containing benzotriazole substituted with a trifluoromethyl group on the benzo ring compared to a similar benzotriazole substituted by a sulfonyl moiety.
Test additives are dry blended with polycarbonate pellets (MAKROLONO 2608-1000, Bayer) using a Turbula mixer. The dry blends are extruded and pelletized using a single screw extruder operated at 525-550°F (274-288°C). The pellets are dried overnight in a vacuum oven and molded into test plaques (2" x 2" x 0125") using an injection molder operated at 525-550°F (274-288°C). The color of the test plaques are measured, as yellowness index values using ASTM D-1925, on ten plaques using a spectrophotometer and the average value reported as seen in the table below.
Formulation* Yellowness Index 0.08% Phosphite 4.5 0.08% Phosphite plus 0.3% UV absorber J 7.9 0.08% Phosphite plus 0.3% UV absorber K 7.4 *Phosphite is tris(2,4-di-tert-butylphenyl) phosphite.
J is 5-trifluoromethyl-2-(2-hydroxy-5-tert-octylphenyl)-2H-benzotriazole.
K is 2-(2-hydroxy-3,5-di-a-cumylphenyl)-2H-benzotriazole.
Additives are dry blended with polycarbonate pellets (LEXAN~ 141-111 N, General Electric) using a turbula mixture. The dry blends are extruded and pelletized using a single screw extruder operated at 525°F (274°C). The pellets are dried overnight in a vacuum oven and molded into test plaques (2" x 2" x 0.125") using an injection molder operated at 525-550°F (274-288°C). The color of the test plaques as yellowness index values is measured on eight plaques using a colorimeter and the average value reported below.
Formulation* Yellowness Index Unstabilized control 6.8 0.3% UV absorber K 8.2 0.3% UV absorber L 7.5 0.3% UV absorber M 13.0 0.3% alkylsulfonyl benzotriazole 24.2 *K is 2-(2-hydroxy-3,5-di-a-cumylphenyl)-2H-benzotriazole.
Lis 2-(2-hydroxy-5-tert-octylphenyl-2H-benzotriazole.
M is 5-chloro-2-(2-hydroxy-3,5-di-tert-butylphenyl-2H-benzotriazole.
Example 33 This example demonstrates the lack of durability of a representative benzotriazole substituted by an electron donating group on the phenoxy ring relevant to a commercial benzotriazole in a coating composition.
A high solids thermoset acrylic clear coat is prepared by mixing an experimental acrylic polyol resin and hexamethoxymethylmelamine (Resimene4 747, Monsanto) at a solids ratio of 60/40. The dodecylbenzene sulfonic acid catalyst (NacureC~ 5225; King Industries) is added at 0.70% by weight. A flow aid Modaflow~ (Monsanto) is added at 0.25% by weight to form a model acrylic melamine resin system.
The model clear coat is reduced with xylene to a viscosity of 26-27 second using a Zahn #2 cup and applied via a conventional air spray at 50 psi (3.5 Kg/cm2) over a 1" x 3"
(2.54 cm x 7.62 cm) quartz slide. Cure is achieved by baking the slide for 30 minutes at 260°F (127°C). The clear coat is stabilized with 1 % by weight of a hindered amine light stabilizer, bis-(1-octyloxy-2,2,6,6-tetramethylpiperidin-4-yl) sebacate, (TINUVINO 123, Ciba-Geigy). The various test benzotriazole UV absorbers are incorporated at the 5 mmol % by weight in the clear coat. The film thickness on the quartz slides range from 1.15 to 1.41 mils (0.029 to 0.036 mm).
The films on the quartz slides are weathered according to the following conditions in Xenon Arc Weather-Ometer with a controlled irradiance at 6500 W, using inner quartz and outer borosilicate S-type filter. The irradiation cycle is as follows: 40 minutes of straight irradiation with no water spray, followed by 20 minutes of light plus front spray, followed by 60 minutes of light irradiation and finally by 60 minutes dart plus rear spray (condensation).
The setting is at 0.55 W/M2 at 340 nm, 1.98 kJ/hour. In the light cycle the black panel temperature is controlled at 70~2°C. The relative humidity in the light cycle is in the range of 50-55% and in the dark cycle 100%. The absorbance of the long wavelength UV
band as a function of Xenon arc weathering hours are recorded in the table below.
To follow the loss of UV absorbers from the clear coats, UV spectra are measured initially and after weathering at regular time intervals. The UV
spectrophotometer measures absorbance linearly up to 5.5 absorbance units using a reference beam attenuation technique.
It is assumed that the degradation products from the UV absorber do not contribute to the UV spectrum. This is tested by following the ratio of absorbance of the band at about 300 nm and the band at about 340 nm. The ratio does not change upon weathering the sample, This suggests that the UV spectrum of the weathered films correspond to the amount of UV absorber remaining in the film with very little if any contribution to the spectrum by photo degradants.
Representative benzotriazole test compounds are incorporated into a high solids thermoset acrylic melamine resin at concentrations between 1.93 and 3% by weight to give equal molar concentrations of the test benzotriazole in equal film thickness and sufficient to give a starting absorbance of approximately 2.0 absorbance units. The test samples are exposed for 1002 hours.
Compound* Units of Absorbance Loss A 0.28 N 1.58 *A is 2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
N is 2-(2-hydroxy-4-n-butoxyphenyl)-2H-benzotriazole.
A -0.02 0.07 H 0.54 0.72 D 1.05 1.28 E 1.85 2.25 C 2.84 3.35 B 3.75 4.42 *A is 2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
B is 5-phenylsulfonyl-2-(2-hydroxy-3-a-cumyl-5-tent-octylphenyl)-2H-benzotriazole.
C is 5-butylsulfonyl-2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
D is 5-trifluoromethyl-2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
E is 5-carbomethoxy-2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
H is isooctyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate.
The compounds similarly substituted on the benzo ring by an electron withdrawing group, but not having an a-cumyl moiety in the 3-position of the phenyl ring have better color than the compounds having an a-cumyl group at that position.
Example 32 Yellowness Color Data The following example shows the lower color in a polymer resin composition containing benzotriazole substituted with a trifluoromethyl group on the benzo ring compared to a similar benzotriazole substituted by a sulfonyl moiety.
Test additives are dry blended with polycarbonate pellets (MAKROLONO 2608-1000, Bayer) using a Turbula mixer. The dry blends are extruded and pelletized using a single screw extruder operated at 525-550°F (274-288°C). The pellets are dried overnight in a vacuum oven and molded into test plaques (2" x 2" x 0125") using an injection molder operated at 525-550°F (274-288°C). The color of the test plaques are measured, as yellowness index values using ASTM D-1925, on ten plaques using a spectrophotometer and the average value reported as seen in the table below.
Formulation* Yellowness Index 0.08% Phosphite 4.5 0.08% Phosphite plus 0.3% UV absorber J 7.9 0.08% Phosphite plus 0.3% UV absorber K 7.4 *Phosphite is tris(2,4-di-tert-butylphenyl) phosphite.
J is 5-trifluoromethyl-2-(2-hydroxy-5-tert-octylphenyl)-2H-benzotriazole.
K is 2-(2-hydroxy-3,5-di-a-cumylphenyl)-2H-benzotriazole.
Additives are dry blended with polycarbonate pellets (LEXAN~ 141-111 N, General Electric) using a turbula mixture. The dry blends are extruded and pelletized using a single screw extruder operated at 525°F (274°C). The pellets are dried overnight in a vacuum oven and molded into test plaques (2" x 2" x 0.125") using an injection molder operated at 525-550°F (274-288°C). The color of the test plaques as yellowness index values is measured on eight plaques using a colorimeter and the average value reported below.
Formulation* Yellowness Index Unstabilized control 6.8 0.3% UV absorber K 8.2 0.3% UV absorber L 7.5 0.3% UV absorber M 13.0 0.3% alkylsulfonyl benzotriazole 24.2 *K is 2-(2-hydroxy-3,5-di-a-cumylphenyl)-2H-benzotriazole.
Lis 2-(2-hydroxy-5-tert-octylphenyl-2H-benzotriazole.
M is 5-chloro-2-(2-hydroxy-3,5-di-tert-butylphenyl-2H-benzotriazole.
Example 33 This example demonstrates the lack of durability of a representative benzotriazole substituted by an electron donating group on the phenoxy ring relevant to a commercial benzotriazole in a coating composition.
A high solids thermoset acrylic clear coat is prepared by mixing an experimental acrylic polyol resin and hexamethoxymethylmelamine (Resimene4 747, Monsanto) at a solids ratio of 60/40. The dodecylbenzene sulfonic acid catalyst (NacureC~ 5225; King Industries) is added at 0.70% by weight. A flow aid Modaflow~ (Monsanto) is added at 0.25% by weight to form a model acrylic melamine resin system.
The model clear coat is reduced with xylene to a viscosity of 26-27 second using a Zahn #2 cup and applied via a conventional air spray at 50 psi (3.5 Kg/cm2) over a 1" x 3"
(2.54 cm x 7.62 cm) quartz slide. Cure is achieved by baking the slide for 30 minutes at 260°F (127°C). The clear coat is stabilized with 1 % by weight of a hindered amine light stabilizer, bis-(1-octyloxy-2,2,6,6-tetramethylpiperidin-4-yl) sebacate, (TINUVINO 123, Ciba-Geigy). The various test benzotriazole UV absorbers are incorporated at the 5 mmol % by weight in the clear coat. The film thickness on the quartz slides range from 1.15 to 1.41 mils (0.029 to 0.036 mm).
The films on the quartz slides are weathered according to the following conditions in Xenon Arc Weather-Ometer with a controlled irradiance at 6500 W, using inner quartz and outer borosilicate S-type filter. The irradiation cycle is as follows: 40 minutes of straight irradiation with no water spray, followed by 20 minutes of light plus front spray, followed by 60 minutes of light irradiation and finally by 60 minutes dart plus rear spray (condensation).
The setting is at 0.55 W/M2 at 340 nm, 1.98 kJ/hour. In the light cycle the black panel temperature is controlled at 70~2°C. The relative humidity in the light cycle is in the range of 50-55% and in the dark cycle 100%. The absorbance of the long wavelength UV
band as a function of Xenon arc weathering hours are recorded in the table below.
To follow the loss of UV absorbers from the clear coats, UV spectra are measured initially and after weathering at regular time intervals. The UV
spectrophotometer measures absorbance linearly up to 5.5 absorbance units using a reference beam attenuation technique.
It is assumed that the degradation products from the UV absorber do not contribute to the UV spectrum. This is tested by following the ratio of absorbance of the band at about 300 nm and the band at about 340 nm. The ratio does not change upon weathering the sample, This suggests that the UV spectrum of the weathered films correspond to the amount of UV absorber remaining in the film with very little if any contribution to the spectrum by photo degradants.
Representative benzotriazole test compounds are incorporated into a high solids thermoset acrylic melamine resin at concentrations between 1.93 and 3% by weight to give equal molar concentrations of the test benzotriazole in equal film thickness and sufficient to give a starting absorbance of approximately 2.0 absorbance units. The test samples are exposed for 1002 hours.
Compound* Units of Absorbance Loss A 0.28 N 1.58 *A is 2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
N is 2-(2-hydroxy-4-n-butoxyphenyl)-2H-benzotriazole.
It is clear that the presence of an electron donating group on the phenoxy ring of the benzotriazole adversely affects the durability of said benzotriazole.
Example 34 The durability of representative benzotriazoles in thermoplastic substrates is determined by incorporating various test compounds into solvent cast films of polycarbonate resins. The free standing films are mounted into cardboard holders, secured in metal frames and exposed in an Atlas C165 Xenon-arc Weather-Ometer under dry conditions according to ASTM G26 for 1100 and 2200 hour exposure. Loss of UV absorber is determined by monitoring the loss of diagnostic UV absorption as described earlier.
Performance is measured by a change in color or the physical integrity of the film.
Polycarbonate flake (LEXANO 145, General Electric) is dissolved in methylene chloride at room temperature along with between 1 and 3% by weight of test benzotriazole, based on the polycarbonate. Films are cast using a calibrated drawdown bar to prepare 1 mil thick film after drying.
The following test data show the increase in durability obtained with a benzotriazole substituted on the 5-position of the benzo ring with a trifluoromethyl moiety.
These results mirror those obtained with coating results.
Absorbance (max) Compound* (wt %,) Loss ~,max after 550 hours K (2.5) 0.119 (343 nm) G (2.18) 0.025 (352 nm) O (2.35) 0.042 (352 nm) *K is 2-(2-hydroxy-3,5-di-a-cumylphenyl)-2H-benzotriazole.
G is 5-trifluoromethyl-2-(2-hydroxy-3,5-di-tert-butylphenyl)-2H-benzotriazole.
O is methyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tent-butyl-4-hydroxyhydrocinnamate.
Example 34 The durability of representative benzotriazoles in thermoplastic substrates is determined by incorporating various test compounds into solvent cast films of polycarbonate resins. The free standing films are mounted into cardboard holders, secured in metal frames and exposed in an Atlas C165 Xenon-arc Weather-Ometer under dry conditions according to ASTM G26 for 1100 and 2200 hour exposure. Loss of UV absorber is determined by monitoring the loss of diagnostic UV absorption as described earlier.
Performance is measured by a change in color or the physical integrity of the film.
Polycarbonate flake (LEXANO 145, General Electric) is dissolved in methylene chloride at room temperature along with between 1 and 3% by weight of test benzotriazole, based on the polycarbonate. Films are cast using a calibrated drawdown bar to prepare 1 mil thick film after drying.
The following test data show the increase in durability obtained with a benzotriazole substituted on the 5-position of the benzo ring with a trifluoromethyl moiety.
These results mirror those obtained with coating results.
Absorbance (max) Compound* (wt %,) Loss ~,max after 550 hours K (2.5) 0.119 (343 nm) G (2.18) 0.025 (352 nm) O (2.35) 0.042 (352 nm) *K is 2-(2-hydroxy-3,5-di-a-cumylphenyl)-2H-benzotriazole.
G is 5-trifluoromethyl-2-(2-hydroxy-3,5-di-tert-butylphenyl)-2H-benzotriazole.
O is methyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tent-butyl-4-hydroxyhydrocinnamate.
Example 35 Following the procedure of Example 34, this example shows in polycarbonate film the increase in the durability of a benzotriazole substituted on the benzo ring with a trifluoro-methyl moiety in the 5-position after exposure for 2000 hours in the Atlas C165 Weather-meter.
Absorbance (max) Compound* (wt %) 0 hrs 2000 hrs Loss units % Loss U (2.19) 2.654 2.638 0.016 0.6 (352 nm) V ( 1.81 ) 2.454 2.270 0.184 7.5 (344 nm) *U is 5-trifluoromethyl-2-(2-hydroxy-5-tert-octylphenyl)-2H-benzotriazole.
V is 2-(2-hydroxy-5-tert-octylphenyl-2H-benzotriazole.
Examale 36 The data in the following example show the change in color of the polycarbonate films exposed according to the procedure of Example 35 as measured on an ACS
spectrophoto-meter, large area view, spectral component included d/8, 10° observer, with yellowness index measured according to ASTM D1925 after 2000 hours exposure.
These data correlates with the advantages seen for the instant compound in terms of stability and spectral coverage leading to a direct increase in performance of the polycarbonate resin films.
Comhound* (wt %) ~ Yellowness Index J (2.19) 2.9 U (1.81 ) 4.0 *J is 5-trifluoromethyl-2-(2-hydroxy-5-tert-octylphenyl)-2H-benzotriazole (compound of Example 38 of GB 2,319,035A).
U is 2-(2-hydroxy-5-tert-octylphenyl-2H-benzotriazole.
The test compound J is discernibly less colored than the prior art compound U.
Example 37 The following example shows an improvement in color protection of a pigmented polyacetal formulation for a benzotriazole substituted on the 5-position of the benzo ring with a trifluoromethyl moiety.
The test additives are dry blended with polyacetal pellets (DELRINO 500P
NC010, DuPont) using a Turbula mixer. The dry blend is extruded and pelletized using a twin screw extruder at a melt temperature of about 410°F (210°C). The pellets are molded into test plaques (2" x 2" x 0.060") using an injection molder operated at 410-420°F (204-216°C). The plaques are exposed in a Xenon-arc Weather-Ometer according to automotive test procedure SAE J1885. Exposure is measured in terms of the total irradiation, measured in kilojoules per square meter (kJ/m2). Color change in the exposed samples is determined by measuring the color of the exposed samples compared to the unexposed samples as color difference (~E) according to ASTM D2244. The contents are in weight %.
Contents* Control Test Sample Polyacetal 98.8% 98.8%
Pigment (CHROMOPHTALO Red 0.30% 0.30%
G) Hindered Amine 0.25% 0.25%
Benzotriazole K 0.60% --Benzotriazole D -- 0.60%
ACRAWAX C 0.05% 0.05%
Color Difference (DE) after 600 kJ/m2 6.8 5.8 after 900 kJ/m2 11.7 10.0 after 1240 kJ/m2 22.5 20.0 *Hindered amine is di(1,2,2,6,6-pentamethylpiperidin-4-yl) 2-butyl-2-(3,5-di-tert-butyl-4-hydroxybenzyl)malonate.
K is 2-(2-hydroxy-3,5-di-a-cumylphenyl)-2H-benzotriazole.
D is 5-trifluoromethyl-2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
Example 38 The following examples illustrates the superior performance of a benzotriazole substituted on the 5-position of the benzo ring with a trifluoromethyl group in protecting poly(butylene terephthalate) as measured by gloss retention.
The test additives are dry blended with poly(butylene terephthalate) pellets (VALOXO
315-1001, General Electric) using a Turbula mixer. The dry blends are extruded and pelletized using a twin screw extruder at 465-490°C. The pellets are molded into test plaques (2" x 2" x 0.060") using an injection molder operated at 475-515°F (246-268°C). The plaques are exposed in a Xenon arc Weather-Ometer according to ASTM G26 test method A.
Gloss is measure at 60° on the unexposed and exposed samples using a glossmeter according to ASTM D523. Gloss retention % _ (gloss exposed sample/gloss of unexposed sample) x 100.
The contents are in weight %.
Contents* Control Test Sample Poly(butylene 98.35% 98.35%
terephthalate) Titanium Dioxide1.00% 1.00%
Hindered Phenol 0.05% 0.05%
Phosphite 0.10% 0.10%
Benzotriazole K 0.50% --Benzotriazole D -- 0.60%
Gloss Retention after 500 hrs exposure 89% 94%
after 750 hrs exposure 65% 82%
*Hindered phenol is 3,5-dioxaoctamethylene bis(3-methyl-5-tert-butyl-4-hydroxy-hydrocinnamate).
Phosphite is tris(2,4-di-tert-butylphenyl) phosphite.
K is 2-(2-hydroxy-3,5-di-a-cumylphenyl)-2H-benzotriazole.
D is 5-trifluoromethyl-2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
Example 39 Polystyrene films (crystalline polystyrene obtained from Chevron, free of zinc stearate and mineral oil) are solvent case from solutions in methylene chloride. These films are exposed to UV light as described in Example 34. The samples contain no hindered amine stabilizer and are monitored for color change after 1000 hours exposure, for loss of UV
absorber and for physical integrity (cracking or catastrophic film failure).
Exposure is stopped after 1500 hours.
Exposure 1000 hours and 1500 hours Compound* (wt %j Yellowness Index Film Inteqrity Compound of Example 38 of (2.19%) 6.2 film intact GB 2,319,035A
Compound U 6.9 film failed Compound K 9.2 film cracking *Compound U is 2-(2-hydroxy-5-tert-octylphenyl)-2H-benzotriazole.
Compound K is 2-(2-hydroxy-3,5-dia-cumylphenyl)-2H-benzotriazole.
Products from the polystyrene degradation absorbed in the ultraviolet obscuring attempts at UV absorber measurements. Color data obtained after 1000 hours exposure show the effectiveness of the instant compound of Example 2. After 1500 hours exposure, the films containing compounds A and P show significant film degradation while the film containing the instant compound of Example 2 is still intact.
Example 40 Polycarbonate films of about 1 mil thickness and containing a UV absorber are prepared by dissolving polycarbonate granules (LEXAN~ 145, General Electric) and UV
absorbers in methylene chloride and casting the films on a glass plate using a drawdown bar. The films are exposed for 2000 hours in a Xenon Arc Weather-O-meter according to ASTM G26 test method C and the color change (DYI) versus that for unexposed films are recorded.
Sample* !5% by weir FYI
Compound W 6.0 Compound P 4.4 *Compound W is 2,2'-methylene-bis[6-(2H-benzotriazol-2-yl)-4-tert-octylphenol].
Compound P is 2,2'-methylene-bis[6-(5-trifluoromethyl-2H-benzotriazol-2-yl)-4-tert-octyl-phenol].
The instant compound provides discernibly better color to the polycarbonate composition than Compound W.
Example 41 5-Trifluoromethyl-2-[2-hydroxy-3-a-cumyl-5-(2-hydroxyethyl)phenyl]-2H-benzotriazole When using the general procedure of A) the 2-a-cumyl-4-tert-octylphenol is replaced by 2-a-cumyl-4-(2-hydroxyethyl)phenol, the title compound is prepared.
Absorbance (max) Compound* (wt %) 0 hrs 2000 hrs Loss units % Loss U (2.19) 2.654 2.638 0.016 0.6 (352 nm) V ( 1.81 ) 2.454 2.270 0.184 7.5 (344 nm) *U is 5-trifluoromethyl-2-(2-hydroxy-5-tert-octylphenyl)-2H-benzotriazole.
V is 2-(2-hydroxy-5-tert-octylphenyl-2H-benzotriazole.
Examale 36 The data in the following example show the change in color of the polycarbonate films exposed according to the procedure of Example 35 as measured on an ACS
spectrophoto-meter, large area view, spectral component included d/8, 10° observer, with yellowness index measured according to ASTM D1925 after 2000 hours exposure.
These data correlates with the advantages seen for the instant compound in terms of stability and spectral coverage leading to a direct increase in performance of the polycarbonate resin films.
Comhound* (wt %) ~ Yellowness Index J (2.19) 2.9 U (1.81 ) 4.0 *J is 5-trifluoromethyl-2-(2-hydroxy-5-tert-octylphenyl)-2H-benzotriazole (compound of Example 38 of GB 2,319,035A).
U is 2-(2-hydroxy-5-tert-octylphenyl-2H-benzotriazole.
The test compound J is discernibly less colored than the prior art compound U.
Example 37 The following example shows an improvement in color protection of a pigmented polyacetal formulation for a benzotriazole substituted on the 5-position of the benzo ring with a trifluoromethyl moiety.
The test additives are dry blended with polyacetal pellets (DELRINO 500P
NC010, DuPont) using a Turbula mixer. The dry blend is extruded and pelletized using a twin screw extruder at a melt temperature of about 410°F (210°C). The pellets are molded into test plaques (2" x 2" x 0.060") using an injection molder operated at 410-420°F (204-216°C). The plaques are exposed in a Xenon-arc Weather-Ometer according to automotive test procedure SAE J1885. Exposure is measured in terms of the total irradiation, measured in kilojoules per square meter (kJ/m2). Color change in the exposed samples is determined by measuring the color of the exposed samples compared to the unexposed samples as color difference (~E) according to ASTM D2244. The contents are in weight %.
Contents* Control Test Sample Polyacetal 98.8% 98.8%
Pigment (CHROMOPHTALO Red 0.30% 0.30%
G) Hindered Amine 0.25% 0.25%
Benzotriazole K 0.60% --Benzotriazole D -- 0.60%
ACRAWAX C 0.05% 0.05%
Color Difference (DE) after 600 kJ/m2 6.8 5.8 after 900 kJ/m2 11.7 10.0 after 1240 kJ/m2 22.5 20.0 *Hindered amine is di(1,2,2,6,6-pentamethylpiperidin-4-yl) 2-butyl-2-(3,5-di-tert-butyl-4-hydroxybenzyl)malonate.
K is 2-(2-hydroxy-3,5-di-a-cumylphenyl)-2H-benzotriazole.
D is 5-trifluoromethyl-2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
Example 38 The following examples illustrates the superior performance of a benzotriazole substituted on the 5-position of the benzo ring with a trifluoromethyl group in protecting poly(butylene terephthalate) as measured by gloss retention.
The test additives are dry blended with poly(butylene terephthalate) pellets (VALOXO
315-1001, General Electric) using a Turbula mixer. The dry blends are extruded and pelletized using a twin screw extruder at 465-490°C. The pellets are molded into test plaques (2" x 2" x 0.060") using an injection molder operated at 475-515°F (246-268°C). The plaques are exposed in a Xenon arc Weather-Ometer according to ASTM G26 test method A.
Gloss is measure at 60° on the unexposed and exposed samples using a glossmeter according to ASTM D523. Gloss retention % _ (gloss exposed sample/gloss of unexposed sample) x 100.
The contents are in weight %.
Contents* Control Test Sample Poly(butylene 98.35% 98.35%
terephthalate) Titanium Dioxide1.00% 1.00%
Hindered Phenol 0.05% 0.05%
Phosphite 0.10% 0.10%
Benzotriazole K 0.50% --Benzotriazole D -- 0.60%
Gloss Retention after 500 hrs exposure 89% 94%
after 750 hrs exposure 65% 82%
*Hindered phenol is 3,5-dioxaoctamethylene bis(3-methyl-5-tert-butyl-4-hydroxy-hydrocinnamate).
Phosphite is tris(2,4-di-tert-butylphenyl) phosphite.
K is 2-(2-hydroxy-3,5-di-a-cumylphenyl)-2H-benzotriazole.
D is 5-trifluoromethyl-2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
Example 39 Polystyrene films (crystalline polystyrene obtained from Chevron, free of zinc stearate and mineral oil) are solvent case from solutions in methylene chloride. These films are exposed to UV light as described in Example 34. The samples contain no hindered amine stabilizer and are monitored for color change after 1000 hours exposure, for loss of UV
absorber and for physical integrity (cracking or catastrophic film failure).
Exposure is stopped after 1500 hours.
Exposure 1000 hours and 1500 hours Compound* (wt %j Yellowness Index Film Inteqrity Compound of Example 38 of (2.19%) 6.2 film intact GB 2,319,035A
Compound U 6.9 film failed Compound K 9.2 film cracking *Compound U is 2-(2-hydroxy-5-tert-octylphenyl)-2H-benzotriazole.
Compound K is 2-(2-hydroxy-3,5-dia-cumylphenyl)-2H-benzotriazole.
Products from the polystyrene degradation absorbed in the ultraviolet obscuring attempts at UV absorber measurements. Color data obtained after 1000 hours exposure show the effectiveness of the instant compound of Example 2. After 1500 hours exposure, the films containing compounds A and P show significant film degradation while the film containing the instant compound of Example 2 is still intact.
Example 40 Polycarbonate films of about 1 mil thickness and containing a UV absorber are prepared by dissolving polycarbonate granules (LEXAN~ 145, General Electric) and UV
absorbers in methylene chloride and casting the films on a glass plate using a drawdown bar. The films are exposed for 2000 hours in a Xenon Arc Weather-O-meter according to ASTM G26 test method C and the color change (DYI) versus that for unexposed films are recorded.
Sample* !5% by weir FYI
Compound W 6.0 Compound P 4.4 *Compound W is 2,2'-methylene-bis[6-(2H-benzotriazol-2-yl)-4-tert-octylphenol].
Compound P is 2,2'-methylene-bis[6-(5-trifluoromethyl-2H-benzotriazol-2-yl)-4-tert-octyl-phenol].
The instant compound provides discernibly better color to the polycarbonate composition than Compound W.
Example 41 5-Trifluoromethyl-2-[2-hydroxy-3-a-cumyl-5-(2-hydroxyethyl)phenyl]-2H-benzotriazole When using the general procedure of A) the 2-a-cumyl-4-tert-octylphenol is replaced by 2-a-cumyl-4-(2-hydroxyethyl)phenol, the title compound is prepared.
Example 42 UV Absorption Data The following table demonstrates the enhanced absorption of the compounds of the instant invention for wavelengths above 350 nm. While the ~, max of the instant compounds is not always significantly shifted relative to the unsubstituted benzotriazoles, the absorbance is much greater as seen by the absorbance at ~, max. In the following examples the absorbance at 375 nm is reported for 20 mg/I concentrations. This is not the molar extinction value.
Compound* 7~ max nm E C~ 7~ max Absorbance C~ 375 nm P 357 20,628 0.44 Q 349 23,908 0.37 *P is 2,2'-methylene-bis[6-(5-trifluoromethyl-2H-benzotriazol-2-yl)-4-tert-octylphenol].
Q is methylene-2-[4-tert-octyl-6-(2H-benzotriazol-2-yl)-2'-[4-tert-octyl-6-(5-trifluoromethyl-2H-benzotriazol-2-yl)phenol].
This demonstrates that, by removing one of the electron withdrawing groups from the dimer, the color of the dimer compound is reduced significantly without compromising its absorption up to 400 nm.
Example 43 The durability of representative benzotriazoles in thermoplastic substrates is determined by incorporating various test compounds into solvent cast films of a poly(methyl methacrylate) (PMMA) resin. The free standing films are mounted into cardboard holders, secured in metal frames and exposed in an Atlas C165 Xenon-arc Weather-Ometer under dry conditions according to ASTM G26 for 1100 and 2200 hour exposure. Loss of UV
absorber is determined by monitoring the loss of diagnostic UV absorption as described earlier. Performance is measured by a change in color of the film, or a loss in absorbance of the UV absorber at ~,max.
Compound* 7~ max nm E C~ 7~ max Absorbance C~ 375 nm P 357 20,628 0.44 Q 349 23,908 0.37 *P is 2,2'-methylene-bis[6-(5-trifluoromethyl-2H-benzotriazol-2-yl)-4-tert-octylphenol].
Q is methylene-2-[4-tert-octyl-6-(2H-benzotriazol-2-yl)-2'-[4-tert-octyl-6-(5-trifluoromethyl-2H-benzotriazol-2-yl)phenol].
This demonstrates that, by removing one of the electron withdrawing groups from the dimer, the color of the dimer compound is reduced significantly without compromising its absorption up to 400 nm.
Example 43 The durability of representative benzotriazoles in thermoplastic substrates is determined by incorporating various test compounds into solvent cast films of a poly(methyl methacrylate) (PMMA) resin. The free standing films are mounted into cardboard holders, secured in metal frames and exposed in an Atlas C165 Xenon-arc Weather-Ometer under dry conditions according to ASTM G26 for 1100 and 2200 hour exposure. Loss of UV
absorber is determined by monitoring the loss of diagnostic UV absorption as described earlier. Performance is measured by a change in color of the film, or a loss in absorbance of the UV absorber at ~,max.
Poly(methyl methacrylate), medium molecular weight, Aldrich, is dissolved in methylene chloride at room temperature along with between 1 and 3% by weight of test benzotriazole, based on the polycarbonate. Films are cast using a calibrated drawdown bar to prepare 1 mil thick film after drying.
The following test data show the increase in durability obtained with a benzotriazole substituted on the 5-position of the benzo ring with a trifluoromethyl moiety.
These results mirror those obtained with coating results.
Absorbance (max) Compound* (wt %) Loss ~,max after 550 hours K (2.5) 0.085 (342 nm) G (2.18) 0.040 (352 nm) O (2.35) 0.033 (352 nm) * K is 2-(2-hydroxy-3,5-di-a-cumylphenyl)-2H-benzotriazole.
G is 5-trifluoromethyl-2-(2-hydroxy-3,5-di-tert-butylphenyl)-2H-benzotriazole.
O is methyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tent-butyl-4-hydroxyhydrocinnamate.
Example 44 Loss Rate Measurements in a Polyurethane Film An acrylic polyol (RK 4037, DuPont) which is 75% solids in methyl amyl ketone is used in these experiments. The molecular weight is 7000-9000 and OH number 145. To 595 g of the acrylic polyol are added 26.2 g of butyl acetate, 5.8 g of ethyl acetate and 0.4 g of 50%
strength FC 430 (flow control aid, 3M). 0.75 g of TINUVIN~ 123, 1 % by weight based on resin solids, is added to the mixture. To 2.43 g of the above mixture is added 0.9 g of DESMODUR~ N-3390; an aliphatic polyisocyanate, 90% solids, Bayer. The UV
absorber is incorporated into the acrylic polyol component. The polyurethane formed is applied as a coating onto a quartz disc by spin coating at 1000 rpm for two second. The wet coating is cured at 260°F (127°C) for 30 minutes.
UV spectra are collected using a ~,-9 UV spectrophotometer from Perkin Elmer every half nm at 120 nm/min using a slit with of 2 nm.
Loss rates are measured from a 1.4 mil coating. The absorbance of the long wavelenth UV absorbance band is around 2.3 before weathering. Weathering is done according to SAE J-1960 (exterior automotive weathering conditions): 0.55 watts/sq. in. at 340 nm using inner and outer borosilicate filters. 40' straight irradiance with no water spray;
20' light plus front spray; 60' light and 60' dark plus rear spray (condensation). Black panel temperature in light cycle is 70~°C and relative humidity of 50-55% in light cycle and 100% in dark cycle. The loss of the long wavelength absorbance band is followed after every 200 hours approximately.
Weathering Data in a Polyurethane Film Loss of lona wavelength absorbance Compound* ~ A S T
Time Hours.
0 2.5173 2.1556 2.5664 207 2.4392 2.1892 1.4549 397 2.3814 2.1149 1.0857 628 2.312 2.1262 0.6588 857 2.2546 2.0912 0.3733 998 2.226 2.0645 0.298 *A is 2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
S is 5-trifluoromethyl-2-(2-hydroxy-3,5-di-a-cumylphenyl)-2H-benzotriazole.
T is 2,2'-dihydroxy-4,4'-dimethoxybenzophenone.
Examale 45 5-Trifluoromethyl-2-[2-hydroxy-5-(3-hydroxypropyl)phenyl]-2H-benzotriazole The title compound is prepared according to the general procedure A) from 4-amino-3-nitrobenzotrifluoride and 4-(3-hydroxypropyl)phenol as a near white solid melting at 113-114°C after purification by column chromatography on silica gel.
Example 46 5-Trifluoromethyl-2-[2-hydroxy-5-(3-propionyloxypropyl)phenyl]-2H-benzotriazole The compound of Example 45, propionic acid and a catalytic amount of p-toluene-sulfonic acid dissolved in toluene are heated to reflux for six hours using a Dean-Stark trap to remove water as it is formed. The toluene is removed by distillation. The residue is dissolved in heptane/ethyl acetate, washed twice with water and then concentrated. The crude product is recystallized from heptane after filtration through a small pad of silica gel to yield the title compound as a light yellow solid melting at 58-59°C.
Example 47 5-Pentafluoroethyl-2-(2-hydroxy-5-tert-butylphenyl)-2H-benzotriazole The title compound is prepared according to the general procedure used to make the benzotriazoles from 2-nitro-4-pentafluoroethylaniline and 4-tert-butylphenol.
The following test data show the increase in durability obtained with a benzotriazole substituted on the 5-position of the benzo ring with a trifluoromethyl moiety.
These results mirror those obtained with coating results.
Absorbance (max) Compound* (wt %) Loss ~,max after 550 hours K (2.5) 0.085 (342 nm) G (2.18) 0.040 (352 nm) O (2.35) 0.033 (352 nm) * K is 2-(2-hydroxy-3,5-di-a-cumylphenyl)-2H-benzotriazole.
G is 5-trifluoromethyl-2-(2-hydroxy-3,5-di-tert-butylphenyl)-2H-benzotriazole.
O is methyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tent-butyl-4-hydroxyhydrocinnamate.
Example 44 Loss Rate Measurements in a Polyurethane Film An acrylic polyol (RK 4037, DuPont) which is 75% solids in methyl amyl ketone is used in these experiments. The molecular weight is 7000-9000 and OH number 145. To 595 g of the acrylic polyol are added 26.2 g of butyl acetate, 5.8 g of ethyl acetate and 0.4 g of 50%
strength FC 430 (flow control aid, 3M). 0.75 g of TINUVIN~ 123, 1 % by weight based on resin solids, is added to the mixture. To 2.43 g of the above mixture is added 0.9 g of DESMODUR~ N-3390; an aliphatic polyisocyanate, 90% solids, Bayer. The UV
absorber is incorporated into the acrylic polyol component. The polyurethane formed is applied as a coating onto a quartz disc by spin coating at 1000 rpm for two second. The wet coating is cured at 260°F (127°C) for 30 minutes.
UV spectra are collected using a ~,-9 UV spectrophotometer from Perkin Elmer every half nm at 120 nm/min using a slit with of 2 nm.
Loss rates are measured from a 1.4 mil coating. The absorbance of the long wavelenth UV absorbance band is around 2.3 before weathering. Weathering is done according to SAE J-1960 (exterior automotive weathering conditions): 0.55 watts/sq. in. at 340 nm using inner and outer borosilicate filters. 40' straight irradiance with no water spray;
20' light plus front spray; 60' light and 60' dark plus rear spray (condensation). Black panel temperature in light cycle is 70~°C and relative humidity of 50-55% in light cycle and 100% in dark cycle. The loss of the long wavelength absorbance band is followed after every 200 hours approximately.
Weathering Data in a Polyurethane Film Loss of lona wavelength absorbance Compound* ~ A S T
Time Hours.
0 2.5173 2.1556 2.5664 207 2.4392 2.1892 1.4549 397 2.3814 2.1149 1.0857 628 2.312 2.1262 0.6588 857 2.2546 2.0912 0.3733 998 2.226 2.0645 0.298 *A is 2-(2-hydroxy-3-a-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
S is 5-trifluoromethyl-2-(2-hydroxy-3,5-di-a-cumylphenyl)-2H-benzotriazole.
T is 2,2'-dihydroxy-4,4'-dimethoxybenzophenone.
Examale 45 5-Trifluoromethyl-2-[2-hydroxy-5-(3-hydroxypropyl)phenyl]-2H-benzotriazole The title compound is prepared according to the general procedure A) from 4-amino-3-nitrobenzotrifluoride and 4-(3-hydroxypropyl)phenol as a near white solid melting at 113-114°C after purification by column chromatography on silica gel.
Example 46 5-Trifluoromethyl-2-[2-hydroxy-5-(3-propionyloxypropyl)phenyl]-2H-benzotriazole The compound of Example 45, propionic acid and a catalytic amount of p-toluene-sulfonic acid dissolved in toluene are heated to reflux for six hours using a Dean-Stark trap to remove water as it is formed. The toluene is removed by distillation. The residue is dissolved in heptane/ethyl acetate, washed twice with water and then concentrated. The crude product is recystallized from heptane after filtration through a small pad of silica gel to yield the title compound as a light yellow solid melting at 58-59°C.
Example 47 5-Pentafluoroethyl-2-(2-hydroxy-5-tert-butylphenyl)-2H-benzotriazole The title compound is prepared according to the general procedure used to make the benzotriazoles from 2-nitro-4-pentafluoroethylaniline and 4-tert-butylphenol.
Example 48 Methylene-2-[4-tert-octyl-6-(2H-benzotriazol-2-yl)-2'-[4-tert-butyl-6-(5-trifluoromethyl 2H-benzotriazol-2-yl)phenol].
The title compound is prepared from 5-Trifluoromethyl-2-(2-hydroxy-5-tert-butylphenyl)-2H-benzotriazole which is prepared according to the general procedure A} and which has a melting point of 78-81 ° C and the compound which is 2-(2-hydroxy-5-tert-octylphenyl)-2H-benzotriazole according to the general procedure of Example 10 as a light yellow solid melting at 157-159°C after purification by column chromatography on silica gel.
Example 49 The data in the following examples show the change in color of the polycarbonate films exposed according to the procedure of Example 34 as measured on an ACS
spectrophotometer, large area view, spectral component included d/8, 10° observer, with yellowness index measured according to ASTM D1925 after 550 hours exposure.
These data correlate with the advantages seen for the instant compounds in terms of stability and spectral coverage leading to a direct increase in performance of the polycarbonate resin films.
Compound* (wt %) Delta Yellowness Index after 550 hours Blank 4.95 K (2.5) 0.79 O (2.35) 0.70 G (2.18) 0.35 *K is 2-(2-hydroxy-3,5-di-alpha-cumyl)-2H-benzotriazole.
O is methyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tent-butyl-4-hydroxyhydrocinnamate.
G is 5-trifluoromethyl-2-(2-hydroxy-3,5-di-tert-butylphenyl)-2H-benzotriazole.
Example 50 The data in the following example show the change in color in poly(methyl methacrylate) films exposed according to the procdure of Example 43 as measured on an ACS
spectrophotometer, large area view, spectral component included d/8, 10° observer, with yellowness index measured according to ASTM D1925 after 550 hours exposure.
These data correlate with the advantages seen for the instant compounds in terms of stability and spectral coverage leading to a direct increase in performance of the poly(methyl methacrylate) films.
Compound* (wt %) Delta Yellowness Index after 550 hours K (2.5) 0.33 O (2.35) 0.22 G (2.18) 0.09 *K is 2-(2-hydroxy-3,5-di-alpha-cumyl)-2H-benzotriazole.
O is methyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate.
G is 5-trifluoromethyl-2-(2-hydroxy-3,5-di-tert-butylphenyl)-2H-benzotriazole.
Example 51 The data in the following example shos the initial color of the poly(methyl methacrylate) films before exposure according to the procedure of Example 43 where the yellowing index is measured according to ASTM D1925.
The title compound is prepared from 5-Trifluoromethyl-2-(2-hydroxy-5-tert-butylphenyl)-2H-benzotriazole which is prepared according to the general procedure A} and which has a melting point of 78-81 ° C and the compound which is 2-(2-hydroxy-5-tert-octylphenyl)-2H-benzotriazole according to the general procedure of Example 10 as a light yellow solid melting at 157-159°C after purification by column chromatography on silica gel.
Example 49 The data in the following examples show the change in color of the polycarbonate films exposed according to the procedure of Example 34 as measured on an ACS
spectrophotometer, large area view, spectral component included d/8, 10° observer, with yellowness index measured according to ASTM D1925 after 550 hours exposure.
These data correlate with the advantages seen for the instant compounds in terms of stability and spectral coverage leading to a direct increase in performance of the polycarbonate resin films.
Compound* (wt %) Delta Yellowness Index after 550 hours Blank 4.95 K (2.5) 0.79 O (2.35) 0.70 G (2.18) 0.35 *K is 2-(2-hydroxy-3,5-di-alpha-cumyl)-2H-benzotriazole.
O is methyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tent-butyl-4-hydroxyhydrocinnamate.
G is 5-trifluoromethyl-2-(2-hydroxy-3,5-di-tert-butylphenyl)-2H-benzotriazole.
Example 50 The data in the following example show the change in color in poly(methyl methacrylate) films exposed according to the procdure of Example 43 as measured on an ACS
spectrophotometer, large area view, spectral component included d/8, 10° observer, with yellowness index measured according to ASTM D1925 after 550 hours exposure.
These data correlate with the advantages seen for the instant compounds in terms of stability and spectral coverage leading to a direct increase in performance of the poly(methyl methacrylate) films.
Compound* (wt %) Delta Yellowness Index after 550 hours K (2.5) 0.33 O (2.35) 0.22 G (2.18) 0.09 *K is 2-(2-hydroxy-3,5-di-alpha-cumyl)-2H-benzotriazole.
O is methyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate.
G is 5-trifluoromethyl-2-(2-hydroxy-3,5-di-tert-butylphenyl)-2H-benzotriazole.
Example 51 The data in the following example shos the initial color of the poly(methyl methacrylate) films before exposure according to the procedure of Example 43 where the yellowing index is measured according to ASTM D1925.
Compound* (wt %) Initial Yellowness Index (YI) D (2.89) 11.63 O (2.35) 11.19 G (2.18) 10.56 *D is 5-trifluoromethyl-2-(2-hydroxy-3-alpha-cumyl-5-tert-octylphenyl)-2H-benzotriazole.
O is methyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate.
G is 5-trifluoromethyl-2-(2-hydroxy-3,5-di-tert-butylphenyl)-2H-benzotriazole.
These data show that the compounds containing a tent-butyl moiety provide excellent color performance in thermoplastics such as poly(methyl methacrylate) and the like where the bulky ortho substitution of an alpha-cumyl group is not essential as is required in stringent automotive coating field while at the same time exhibiting less color, but equally good or better performance in the thermoplastic compositions.
O is methyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate.
G is 5-trifluoromethyl-2-(2-hydroxy-3,5-di-tert-butylphenyl)-2H-benzotriazole.
These data show that the compounds containing a tent-butyl moiety provide excellent color performance in thermoplastics such as poly(methyl methacrylate) and the like where the bulky ortho substitution of an alpha-cumyl group is not essential as is required in stringent automotive coating field while at the same time exhibiting less color, but equally good or better performance in the thermoplastic compositions.
Claims (16)
1. A compound of formula I, III or IV
wherein G1 is hydrogen or chloro, G2 is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, G6 is perfluoroalkyl of 1 to 12 carbon atoms, G7 is hydrogen or perfluoroalkyl of 1 to 12 carbon atoms, E1 is hydrogen, straight or branched chain alkyl of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 24 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 4 alkyl of 1 to 4 carbon atoms; or E1 is alkyl of 1 to 24 carbon atoms substituted by one or two hydroxy groups, E2 and E2' are independently straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by one to three alkyl of 1 to 4 carbon atoms; or E2 and E2' are independently said alkyl of 1 to 24 carbon atoms or said alkenyl of 2 to 18 carbon atoms substituted by one or more -OH, -OCOE11, -OE4, -NCO, -NH2, -NHCOE11, -or - N(E4)2, or mixtures thereof, where E4 is straight or branched chain alkyl of 1 to 24 carbon atoms; or said alkyl or said alkenyl interrupted by one or more -O-, -NH- or -NE4- groups or mixtures thereof and which can be unsubstituted or substituted by one or more -OH, -OE4 or -NH2 groups or mixtures thereof;
n is 1 or 2, when n is 1, E5 is OE6 or NE7E8, or E5 is -PO(OE12)2, -OSi(E11)3 or -OCO-E11, or straight or branched chain C1-C24alkyl which is interrupted by -O-, -S- or -NE11 and which can be unsubstituted or substituted by -OH or -OCO-E11, C5-C12 cycloalkyl which is unsubstituted or substituted by -OH, straight chain or branched C2-C18alkenyl which is unsubstituted or substituted by -OH, C7-C15aralkyl, -CH2-CHOH-E13 or glycidyl, E6 is hydrogen, straight or branched chain C1-C24alkyl which is unsubstituted or substituted by one or more OH, OE4 or NH2 groups, or -OE6 is -(OCH2CH2)w OH or -(OCH2CH2)w OE21where w is 1 to 12 and E21 is alkyl of 1 to 12 carbon atoms, E7 and E8 are independently hydrogen, alkyl of 1 to 18 carbon atoms, straight or branched chain C3-C18alkyl which is interrupted by -O-, -S- or -NE11-, C5-C12cycloalkyl, C6-C14aryl or C1-C3hydroxylalkyl, or E7 and E8 together with the N atom are a pyrrolidine, piperidine, piperazine or morpholine ring, E5 is -X-(Z)p-Y-E15 wherein X is -O- or -N(E16)-, Y is -O- or -N(E17)-, Z is C2-C12-alkylene, C4-C12-alkylene interrupted by one to three nitrogen atoms, oxygen atoms or a mixture thereof, or is C3-C12-alkylene, butenylene, butynylene, cyclohexylene or phenylene, each substituted by a hydroxyl group, m is zero, 1 or 2, p is 1, or p is also zero when X and Y are -N(E16)- and -N(E17)-, respectively, E15 is a group -CO-C(E18)=C(H)E19 or, when Y is -N(E17)-, forms together with E17 a group -CO-CH=CH-CO-, wherein E18 is hydrogen or methyl, and E19 is hydrogen, methyl or -CO-X-E20, wherein E20 is hydrogen, C1-C12-alkyl or a group of the formula wherein the symbols E1, G2, X, Z, m and p have the meanings defined above, and E16 and E17 independently of one another are hydrogen, C1-C12-alkyl, C3-C12-alkyl interrupted by 1 to 3 oxygen atoms, or is cyclohexyl or C7-C15aralkyl, and E16together with E17 in the case where Z is ethylene, also forms ethylene, when n is 2, E5 is one of divalent radicals -O-E9-O- or -N(E11)-E10-N(E11)-, E9 is C2-C8alkylene, C4-C8alkenylene, C4-C8alkynylene, cyclohexylene, straight or branched chain C4-C10alkylene which is interrupted by -O- or by -CH2-CHOH-CH2-CH2-CHOH-CH2-, E10 being straight or branched chain C2-C12alkylene which may be interrupted by - O-, cyclohexylene, or or E10 and E11with the two nitrogen atoms form a piperazine ring, E14 is straight or branched chain C2-C8alkylene, straight or branched chain C4-C10alkylene which is interrupted by -O-, cycloalkylene, arylene or where E7 and E8 are independently hydrogen, alkyl of 1 to 18 carbon atoms or E7 and E8 together are alkylene of 4 to 6 carbon atoms, 3-oxapentamethylene, 3-iminopentamethylene or 3-methyliminopentamethylene, E11 is hydrogen, straight or branched chain C1-C18alkyl, C5-C12cycloalkyl, straight or branched chain C2-C18alkenyl, C6-C14aryl or C7-C15aralkyl, E12 is straight or branched chain C1-C18alkyl, straight or branched chain C3-C18alkenyl, C5-C10cycloalkyl, C6-C16aryl or C7-C15aralkyl, E13 is H, straight chain or branched C1-C18alkyl which is substituted by -PO(OR12)2, phenyl which is unsubstituted or substituted by OH, C7-C15aralkyl or -CH2OE12, L is alkylene of 1 to 12 carbon atoms, alkylidene of 2 to 12 carbon atoms, benzylidene, p-xylylene, .alpha.,.alpha.,.alpha.',.alpha.'-tetramethyl-m-xylylene or cycloalkylidene, and with the proviso that in formula (I) G2 is not CF3 if E1 is phenyl and E2 is tert.-octyl, or if E1 is .alpha.-cumyl and E2 is .alpha.-cumyl, tert.-butyl, tert.-octyl, nonyl or dodecyl, or if E1 is hydrogen and E2 is tert.-octyl or methyl; and G2 is not fluoro if E2 is tert. octyl and E1 is phenyl or .alpha.-cumyl, and with the proviso that in formula IV, when G6 and G7 are CF3, E2 and E2' are not the same.
wherein G1 is hydrogen or chloro, G2 is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, G6 is perfluoroalkyl of 1 to 12 carbon atoms, G7 is hydrogen or perfluoroalkyl of 1 to 12 carbon atoms, E1 is hydrogen, straight or branched chain alkyl of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 24 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 4 alkyl of 1 to 4 carbon atoms; or E1 is alkyl of 1 to 24 carbon atoms substituted by one or two hydroxy groups, E2 and E2' are independently straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by one to three alkyl of 1 to 4 carbon atoms; or E2 and E2' are independently said alkyl of 1 to 24 carbon atoms or said alkenyl of 2 to 18 carbon atoms substituted by one or more -OH, -OCOE11, -OE4, -NCO, -NH2, -NHCOE11, -or - N(E4)2, or mixtures thereof, where E4 is straight or branched chain alkyl of 1 to 24 carbon atoms; or said alkyl or said alkenyl interrupted by one or more -O-, -NH- or -NE4- groups or mixtures thereof and which can be unsubstituted or substituted by one or more -OH, -OE4 or -NH2 groups or mixtures thereof;
n is 1 or 2, when n is 1, E5 is OE6 or NE7E8, or E5 is -PO(OE12)2, -OSi(E11)3 or -OCO-E11, or straight or branched chain C1-C24alkyl which is interrupted by -O-, -S- or -NE11 and which can be unsubstituted or substituted by -OH or -OCO-E11, C5-C12 cycloalkyl which is unsubstituted or substituted by -OH, straight chain or branched C2-C18alkenyl which is unsubstituted or substituted by -OH, C7-C15aralkyl, -CH2-CHOH-E13 or glycidyl, E6 is hydrogen, straight or branched chain C1-C24alkyl which is unsubstituted or substituted by one or more OH, OE4 or NH2 groups, or -OE6 is -(OCH2CH2)w OH or -(OCH2CH2)w OE21where w is 1 to 12 and E21 is alkyl of 1 to 12 carbon atoms, E7 and E8 are independently hydrogen, alkyl of 1 to 18 carbon atoms, straight or branched chain C3-C18alkyl which is interrupted by -O-, -S- or -NE11-, C5-C12cycloalkyl, C6-C14aryl or C1-C3hydroxylalkyl, or E7 and E8 together with the N atom are a pyrrolidine, piperidine, piperazine or morpholine ring, E5 is -X-(Z)p-Y-E15 wherein X is -O- or -N(E16)-, Y is -O- or -N(E17)-, Z is C2-C12-alkylene, C4-C12-alkylene interrupted by one to three nitrogen atoms, oxygen atoms or a mixture thereof, or is C3-C12-alkylene, butenylene, butynylene, cyclohexylene or phenylene, each substituted by a hydroxyl group, m is zero, 1 or 2, p is 1, or p is also zero when X and Y are -N(E16)- and -N(E17)-, respectively, E15 is a group -CO-C(E18)=C(H)E19 or, when Y is -N(E17)-, forms together with E17 a group -CO-CH=CH-CO-, wherein E18 is hydrogen or methyl, and E19 is hydrogen, methyl or -CO-X-E20, wherein E20 is hydrogen, C1-C12-alkyl or a group of the formula wherein the symbols E1, G2, X, Z, m and p have the meanings defined above, and E16 and E17 independently of one another are hydrogen, C1-C12-alkyl, C3-C12-alkyl interrupted by 1 to 3 oxygen atoms, or is cyclohexyl or C7-C15aralkyl, and E16together with E17 in the case where Z is ethylene, also forms ethylene, when n is 2, E5 is one of divalent radicals -O-E9-O- or -N(E11)-E10-N(E11)-, E9 is C2-C8alkylene, C4-C8alkenylene, C4-C8alkynylene, cyclohexylene, straight or branched chain C4-C10alkylene which is interrupted by -O- or by -CH2-CHOH-CH2-CH2-CHOH-CH2-, E10 being straight or branched chain C2-C12alkylene which may be interrupted by - O-, cyclohexylene, or or E10 and E11with the two nitrogen atoms form a piperazine ring, E14 is straight or branched chain C2-C8alkylene, straight or branched chain C4-C10alkylene which is interrupted by -O-, cycloalkylene, arylene or where E7 and E8 are independently hydrogen, alkyl of 1 to 18 carbon atoms or E7 and E8 together are alkylene of 4 to 6 carbon atoms, 3-oxapentamethylene, 3-iminopentamethylene or 3-methyliminopentamethylene, E11 is hydrogen, straight or branched chain C1-C18alkyl, C5-C12cycloalkyl, straight or branched chain C2-C18alkenyl, C6-C14aryl or C7-C15aralkyl, E12 is straight or branched chain C1-C18alkyl, straight or branched chain C3-C18alkenyl, C5-C10cycloalkyl, C6-C16aryl or C7-C15aralkyl, E13 is H, straight chain or branched C1-C18alkyl which is substituted by -PO(OR12)2, phenyl which is unsubstituted or substituted by OH, C7-C15aralkyl or -CH2OE12, L is alkylene of 1 to 12 carbon atoms, alkylidene of 2 to 12 carbon atoms, benzylidene, p-xylylene, .alpha.,.alpha.,.alpha.',.alpha.'-tetramethyl-m-xylylene or cycloalkylidene, and with the proviso that in formula (I) G2 is not CF3 if E1 is phenyl and E2 is tert.-octyl, or if E1 is .alpha.-cumyl and E2 is .alpha.-cumyl, tert.-butyl, tert.-octyl, nonyl or dodecyl, or if E1 is hydrogen and E2 is tert.-octyl or methyl; and G2 is not fluoro if E2 is tert. octyl and E1 is phenyl or .alpha.-cumyl, and with the proviso that in formula IV, when G6 and G7 are CF3, E2 and E2' are not the same.
2. A compound according to claim 1 of formula I
wherein G1 is hydrogen, G2 is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, E1 is hydrogen or straight or branched alkyl of 4 to 24 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 4 alkyl of 1 to 4 carbon atoms, E2 is straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 3 alkyl of 1 to 4 carbon atoms; or E2 is said alkyl of 1 to 24 carbon atoms or said alkenyl of 2 to 18 carbon atoms substituted by one or more -OH, -OCOE11, -OE4, -NCO, -NH2, -NHCOE11, -NHE4 or -N(E4)2, or mixtures thereof, where E4 is straight or branched chain alkyl of 1 to 24 carbon atoms; or said alkyl or said alkenyl interrupted by one or more -O-, -NH- or -NE4- groups or mixtures thereof and which can be unsubstituted or substituted by one or more -OH, -OE4 or -NH2 groups or mixtures thereof;
E11 is hydrogen, straight or branched chain C1-C18alkyl, C5-C12cycloalkyl, straight or branched chain C2-C18alkenyl, C6-C14aryl or C7-C15aralkyl.
wherein G1 is hydrogen, G2 is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, E1 is hydrogen or straight or branched alkyl of 4 to 24 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 4 alkyl of 1 to 4 carbon atoms, E2 is straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 3 alkyl of 1 to 4 carbon atoms; or E2 is said alkyl of 1 to 24 carbon atoms or said alkenyl of 2 to 18 carbon atoms substituted by one or more -OH, -OCOE11, -OE4, -NCO, -NH2, -NHCOE11, -NHE4 or -N(E4)2, or mixtures thereof, where E4 is straight or branched chain alkyl of 1 to 24 carbon atoms; or said alkyl or said alkenyl interrupted by one or more -O-, -NH- or -NE4- groups or mixtures thereof and which can be unsubstituted or substituted by one or more -OH, -OE4 or -NH2 groups or mixtures thereof;
E11 is hydrogen, straight or branched chain C1-C18alkyl, C5-C12cycloalkyl, straight or branched chain C2-C18alkenyl, C6-C14aryl or C7-C15aralkyl.
3. A compound according to claim 1 of formula I
wherein G1 is hydrogen, G2 is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, E1 is is hydrogen, straight or branched alkyl of 4 to 24 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 4 alkyl of 1 to 4 carbon atoms, E2 is straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 3 alkyl of 1 to 4 carbon atoms; or E2 is said alkyl of 1 to 24 carbon atoms or said alkenyl of 2 to 18 carbon atoms substituted by one or more -OH, -OCOE11, -NH2 or -NHCOE11, or mixtures thereof, or said alkyl or said alkenyl interrupted by one or more -O-and which can be unsubstituted or substituted by one or more -OH.
wherein G1 is hydrogen, G2 is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, E1 is is hydrogen, straight or branched alkyl of 4 to 24 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 4 alkyl of 1 to 4 carbon atoms, E2 is straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 3 alkyl of 1 to 4 carbon atoms; or E2 is said alkyl of 1 to 24 carbon atoms or said alkenyl of 2 to 18 carbon atoms substituted by one or more -OH, -OCOE11, -NH2 or -NHCOE11, or mixtures thereof, or said alkyl or said alkenyl interrupted by one or more -O-and which can be unsubstituted or substituted by one or more -OH.
4. A compound according to claim 1 of formula IIIA
wherein G1 is hydrogen, G2 is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, E1 is hydrogen, straight or branched alkyl of 4 to 24 carbon atoms or phenylalkyl of 7 to 15 carbon atoms, E5 is -OE6 or -NE7E8, or E5 is -X-(Z)p-Y-E15 wherein X is -O- or -N(E16)-, Y is -O- or -N(E17)-, Z is C2-C12-alkylene, C4-C12-alkylene interrupted by one to three nitrogen atoms, oxygen atoms or a mixture thereof, or is C3-C12-alkylene, butenylene, butynylene, cyclohexylene or phenylene, each substituted by a hydroxyl group, m is 0,1,2 or 3, p is 1, or p is also zero when X and Y are -N(E16)- and -N(E17)-, respectively, E15 is a group -CO-C(E18)=C(H)E19 or, when Y is -N(E17)-, forms together with E17 a group -CO-CH=CH-CO-, wherein E18 is hydrogen or methyl, and E19 is hydrogen, methyl or - CO-X-E20, wherein E20 is hydrogen, C1-C12-alkyl or a group of the formula and the other substituents have the meanings as defined in claim 1.
wherein G1 is hydrogen, G2 is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, E1 is hydrogen, straight or branched alkyl of 4 to 24 carbon atoms or phenylalkyl of 7 to 15 carbon atoms, E5 is -OE6 or -NE7E8, or E5 is -X-(Z)p-Y-E15 wherein X is -O- or -N(E16)-, Y is -O- or -N(E17)-, Z is C2-C12-alkylene, C4-C12-alkylene interrupted by one to three nitrogen atoms, oxygen atoms or a mixture thereof, or is C3-C12-alkylene, butenylene, butynylene, cyclohexylene or phenylene, each substituted by a hydroxyl group, m is 0,1,2 or 3, p is 1, or p is also zero when X and Y are -N(E16)- and -N(E17)-, respectively, E15 is a group -CO-C(E18)=C(H)E19 or, when Y is -N(E17)-, forms together with E17 a group -CO-CH=CH-CO-, wherein E18 is hydrogen or methyl, and E19 is hydrogen, methyl or - CO-X-E20, wherein E20 is hydrogen, C1-C12-alkyl or a group of the formula and the other substituents have the meanings as defined in claim 1.
5. A compound according to claim 1 of formula IIIA
wherein G1 is hydrogen, G2 is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, E1 is hydrogen, straight or branched alkyl of 4 to 24 carbon atoms or phenylalkyl of 7 to 15 carbon atoms, E5 is -OE6 or -NE7E8where E6 is hydrogen, straight or branched chain C1-C24alkyl which is unsubstituted or substituted by one or more OH groups, or -OE6 is -(OCH2CH2)w OH or -(OCH2CH2)w OE21where w is 1 to 12 and E21 is alkyl of 1 to 12 carbon atoms, and E7 and E8 are independently hydrogen, alkyl of 1 to 18 carbon atoms, straight or branched chain C3-C18alkyl which is interrupted by -O-, -S- or -NE11-, C5-C12cycloalkyl, C6-C14aryl or C1-C3hydroxylalkyl, or E7 and E8 together with the N atom are a pyrrolidine, piperidine, piperazine or morpholine ring and the other substituents have the meaning as defined in claim 1.
wherein G1 is hydrogen, G2 is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, E1 is hydrogen, straight or branched alkyl of 4 to 24 carbon atoms or phenylalkyl of 7 to 15 carbon atoms, E5 is -OE6 or -NE7E8where E6 is hydrogen, straight or branched chain C1-C24alkyl which is unsubstituted or substituted by one or more OH groups, or -OE6 is -(OCH2CH2)w OH or -(OCH2CH2)w OE21where w is 1 to 12 and E21 is alkyl of 1 to 12 carbon atoms, and E7 and E8 are independently hydrogen, alkyl of 1 to 18 carbon atoms, straight or branched chain C3-C18alkyl which is interrupted by -O-, -S- or -NE11-, C5-C12cycloalkyl, C6-C14aryl or C1-C3hydroxylalkyl, or E7 and E8 together with the N atom are a pyrrolidine, piperidine, piperazine or morpholine ring and the other substituents have the meaning as defined in claim 1.
6. A compound according to claim 1 of formula IV
wherein G6 is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, G7 is hydrogen or CF3, E2 and E2' are independently straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 3 alkyl of 1 to 4 carbon atoms; and L is alkylene of 1 to 12 carbon atoms, alkylidene of 2 to 12 carbon atoms, benzylidene, p-xylylene, a,a,a',a'-tetramethyl-m-xylylene or cycloalkylidene.
wherein G6 is perfluoroalkyl of 1 to 12 carbon atoms or fluoro, G7 is hydrogen or CF3, E2 and E2' are independently straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 3 alkyl of 1 to 4 carbon atoms; and L is alkylene of 1 to 12 carbon atoms, alkylidene of 2 to 12 carbon atoms, benzylidene, p-xylylene, a,a,a',a'-tetramethyl-m-xylylene or cycloalkylidene.
7. A compound according to claim 1 of formula IV
wherein G6 is CF3, G7 is hydrogen or CF3, E2 and E2' are independently straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 3 alkyl of 1 to 4 carbon atoms; and L is methylene.
wherein G6 is CF3, G7 is hydrogen or CF3, E2 and E2' are independently straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 3 alkyl of 1 to 4 carbon atoms; and L is methylene.
8. A compound according to claim 1, wherein G2 is -CF3 or F, G6 is -CF3 and G7 is hydrogen.
9. A compound according to claim 1 which is (c) 5-trifluoromethyl-2-(2-hydroxy-3,5-di-tert-octylphenyl)-2H-benzotriazole;
(d) 2,2'-methylene-bis[6-(5-pentafluoroethyl-2H-benzotriazol-2-yl)-4-tert-octylphenol];
(e) methylene-2-[4-tert-octyl-6-(2H-benzotriazol-2-yl)phenol]2'-[4-tert-octyl-6-(5-trifluoro-methyl-2H-benzotriazol-2-yl)phenol];
(f) 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamic acid;
(g) methyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate;
(h) isooctyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate;
(i) 5-trifluoromethyl-2-[2-hydroxy-5-(3-hydroxypropyl)phenyl]-2H-benzotriazole;
(j) 5-trifluoromethyl-2-[2-hydroxy-5-(3-acryloyloxypropyl)phenyl]-2H-benzotriazole;
(k) 5-trifluoromethyl-2-[2-hydroxy-5-(3-methacryloyloxypropyl)phenyl]-2H-benzotriazole;
(l) 5-trifluoromethyl-2-[2-hydroxy-5-(3-acrylylaminopropyl)phenyl]-2H-benzotriazole;
(m) 5-trifluoromethyl-2-[2-hydroxy-5-(3-methacrylylaminopropyl)phenyl]-2H-benzotriazole;
(p) 5-trifluoromethyl-2-[2-hydroxy-3-.alpha.-cumyl-5-(2-hydroxyethyl)phenyl]-2H-benzotriazole;
(q) 5-trifluoromethyl-2-[2-hydroxy-3-.alpha.-cumyl-5-(3-hydroxypropyl)phenyl]-2H-benzotriazole;
(r) 5-trifluoromethyl-2-(2-hydroxy-3,5-ditert-amylphenyl)-2H-benzotriazole;
(s) 5-trifluoromethyl-2-(2-hydroxy-3,5-ditert-butylphenyl)-2H-benzotriazole;
(t) 5-trifluoromethyl-2-(2-hydroxy-3-dodecyl-5-methylphenyl)-2H-benzotriazole;
(u) 5-trifluoromethyl-2-[2-hydroxy-3-tert-butyl-5-(3-hydroxypropyl)phenyl)-2H-benzotriazole;
(v) 5-trifluoromethyl-2-[2-hydroxy-3-tert-butyl-5-(2-hydroxyethyl)phenyl]-2H-benzotriazole;
(w) 5-trifluoromethyl-2-[2-hydroxy-5-(2-hydroxyethyl)phenyl]-2H-benzotriazole;
(x) 5-fluoro-2-(2-hydroxy-3,5-di-.alpha.-cumylphenyl)-2H-benzotriazole (y) 5-trifluoromethyl-2-[2-hydroxy-5-(3-hydroxypropyl)phenyl]-2H-benzotriazole;
(z) 5-trifluoromethyl-2-[2-hydroxy-5-(3-propionyloxypropyl)phenyl]-2H-benzotriazole;
(aa) 5-pentafluoroethyl-2-(2-hydroxy-5-tert-butylphenyl)-2H-benzotriazole; or (bb) methylene-2-[4-tert-octyl-6-(2H-benzotriazol-2-yl)-2'-[4-tert-butyl-6-(5-trifluoromethyl-2H-benzotriazol-2-yl)phenol].
(d) 2,2'-methylene-bis[6-(5-pentafluoroethyl-2H-benzotriazol-2-yl)-4-tert-octylphenol];
(e) methylene-2-[4-tert-octyl-6-(2H-benzotriazol-2-yl)phenol]2'-[4-tert-octyl-6-(5-trifluoro-methyl-2H-benzotriazol-2-yl)phenol];
(f) 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamic acid;
(g) methyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate;
(h) isooctyl 3-(5-trifluoromethyl-2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate;
(i) 5-trifluoromethyl-2-[2-hydroxy-5-(3-hydroxypropyl)phenyl]-2H-benzotriazole;
(j) 5-trifluoromethyl-2-[2-hydroxy-5-(3-acryloyloxypropyl)phenyl]-2H-benzotriazole;
(k) 5-trifluoromethyl-2-[2-hydroxy-5-(3-methacryloyloxypropyl)phenyl]-2H-benzotriazole;
(l) 5-trifluoromethyl-2-[2-hydroxy-5-(3-acrylylaminopropyl)phenyl]-2H-benzotriazole;
(m) 5-trifluoromethyl-2-[2-hydroxy-5-(3-methacrylylaminopropyl)phenyl]-2H-benzotriazole;
(p) 5-trifluoromethyl-2-[2-hydroxy-3-.alpha.-cumyl-5-(2-hydroxyethyl)phenyl]-2H-benzotriazole;
(q) 5-trifluoromethyl-2-[2-hydroxy-3-.alpha.-cumyl-5-(3-hydroxypropyl)phenyl]-2H-benzotriazole;
(r) 5-trifluoromethyl-2-(2-hydroxy-3,5-ditert-amylphenyl)-2H-benzotriazole;
(s) 5-trifluoromethyl-2-(2-hydroxy-3,5-ditert-butylphenyl)-2H-benzotriazole;
(t) 5-trifluoromethyl-2-(2-hydroxy-3-dodecyl-5-methylphenyl)-2H-benzotriazole;
(u) 5-trifluoromethyl-2-[2-hydroxy-3-tert-butyl-5-(3-hydroxypropyl)phenyl)-2H-benzotriazole;
(v) 5-trifluoromethyl-2-[2-hydroxy-3-tert-butyl-5-(2-hydroxyethyl)phenyl]-2H-benzotriazole;
(w) 5-trifluoromethyl-2-[2-hydroxy-5-(2-hydroxyethyl)phenyl]-2H-benzotriazole;
(x) 5-fluoro-2-(2-hydroxy-3,5-di-.alpha.-cumylphenyl)-2H-benzotriazole (y) 5-trifluoromethyl-2-[2-hydroxy-5-(3-hydroxypropyl)phenyl]-2H-benzotriazole;
(z) 5-trifluoromethyl-2-[2-hydroxy-5-(3-propionyloxypropyl)phenyl]-2H-benzotriazole;
(aa) 5-pentafluoroethyl-2-(2-hydroxy-5-tert-butylphenyl)-2H-benzotriazole; or (bb) methylene-2-[4-tert-octyl-6-(2H-benzotriazol-2-yl)-2'-[4-tert-butyl-6-(5-trifluoromethyl-2H-benzotriazol-2-yl)phenol].
10. A composition stabilized against thermal, oxidative or light-induced degradation which comprises, (a) an organic material subject to thermal, oxidative or light-induced degradation, and (b) an effective stabilizing amount of a compound of formula I, III or IV
according to claim 1.
according to claim 1.
11. A composition according to claim 10 wherein the organic material is a natural, semi-synthetic or synthetic polymer.
12. A composition according to claim 10 wherein the organic material is a coating.
13. A composition according to claim 11 wherein the polymer is a polyolefin, polycarbonate, a styrenic, ABS, a nylon (polyamide), a polyarylamide, a polyester, a polyurethane, a poly(ether sulfone), a polyacrylate, a rubber modified styrenic, poly(vinyl chloride), poly(vinyl butyral), polyacetal (polyoxymethylene), or other blends or copolymers such as poly(ethylene/1,4-cyclohexylenedimethylene terephthalate) PETG or an ethylene/acrylic acid copolymer or salts thereof (an ionomer).
14. A composition according to claim 10 which additionally contains an effective stabilizing amount of at least one other UV absorber selected from the group consisting of the benzotriazoles, the s-triazines, hydroxy-benzophenones, the .alpha.-cyanoacrylates, the oxanilides and benzoates.
15. A composition according to claim 10 which also contains an effective stabilizing amount of a hindered amine.
16. Use of a compound of formula I, III or IV according to claim 1 for stabilizing an organic material against thermal, oxidative or light induced degradation.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US09/234,880 US6166218A (en) | 1996-11-07 | 1999-01-21 | Benzotriazole UV absorbers having enhanced durability |
US09/234880 | 1999-01-21 |
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CA2296246A1 true CA2296246A1 (en) | 2000-07-21 |
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CA002296246A Abandoned CA2296246A1 (en) | 1999-01-21 | 2000-01-19 | Benzotriazole uv absorbers having enhanced durability |
Country Status (13)
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US (5) | US6166218A (en) |
JP (1) | JP2000212170A (en) |
KR (1) | KR20000076503A (en) |
CN (1) | CN1170824C (en) |
BE (1) | BE1013234A3 (en) |
BR (1) | BR0000124A (en) |
CA (1) | CA2296246A1 (en) |
DE (1) | DE10001832A1 (en) |
ES (1) | ES2160086B1 (en) |
FR (1) | FR2789388B1 (en) |
GB (1) | GB2346369B (en) |
IT (1) | IT1317727B1 (en) |
NL (1) | NL1014139C2 (en) |
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- 2000-01-20 CN CNB001011367A patent/CN1170824C/en not_active Expired - Fee Related
- 2000-01-20 ES ES200000111A patent/ES2160086B1/en not_active Expired - Fee Related
- 2000-01-21 KR KR1020000002854A patent/KR20000076503A/en not_active Application Discontinuation
- 2000-07-12 US US09/614,527 patent/US6262151B1/en not_active Expired - Fee Related
-
2001
- 2001-01-11 US US09/760,089 patent/US20010007886A1/en not_active Abandoned
- 2001-05-08 US US09/851,453 patent/US6458872B1/en not_active Expired - Fee Related
- 2001-12-18 US US10/023,257 patent/US6515051B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CN1265395A (en) | 2000-09-06 |
ITMI20000046A1 (en) | 2001-07-17 |
GB2346369B (en) | 2002-04-17 |
US20020099221A1 (en) | 2002-07-25 |
ES2160086A1 (en) | 2001-10-16 |
US6515051B2 (en) | 2003-02-04 |
KR20000076503A (en) | 2000-12-26 |
US20010007886A1 (en) | 2001-07-12 |
US6166218A (en) | 2000-12-26 |
CN1170824C (en) | 2004-10-13 |
US6262151B1 (en) | 2001-07-17 |
GB0000610D0 (en) | 2000-03-01 |
FR2789388B1 (en) | 2005-11-18 |
JP2000212170A (en) | 2000-08-02 |
GB2346369A (en) | 2000-08-09 |
ES2160086B1 (en) | 2002-06-16 |
FR2789388A1 (en) | 2000-08-11 |
IT1317727B1 (en) | 2003-07-15 |
US20020065341A1 (en) | 2002-05-30 |
NL1014139C2 (en) | 2001-05-15 |
US6458872B1 (en) | 2002-10-01 |
NL1014139A1 (en) | 2000-07-24 |
BE1013234A3 (en) | 2001-11-06 |
ITMI20000046A0 (en) | 2000-01-17 |
BR0000124A (en) | 2000-09-26 |
DE10001832A1 (en) | 2000-07-27 |
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Legal Events
Date | Code | Title | Description |
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EEER | Examination request | ||
FZDE | Discontinued |