WO2002000749A3 - Polyurethane hydrogel contact lens - Google Patents

Polyurethane hydrogel contact lens Download PDF

Info

Publication number
WO2002000749A3
WO2002000749A3 PCT/EP2001/007160 EP0107160W WO0200749A3 WO 2002000749 A3 WO2002000749 A3 WO 2002000749A3 EP 0107160 W EP0107160 W EP 0107160W WO 0200749 A3 WO0200749 A3 WO 0200749A3
Authority
WO
WIPO (PCT)
Prior art keywords
contact lens
hydrogel contact
prepolymer
polyurethane hydrogel
diol
Prior art date
Application number
PCT/EP2001/007160
Other languages
French (fr)
Other versions
WO2002000749A2 (en
Inventor
Gregory Carlson
Edgar Alan Blair
Peter Wachtel
Michael H Quinn
Joshua Wallach
Original Assignee
Jessen Wesley Corp
Novartis Ag
Gregory Carlson
Edgar Alan Blair
Peter Wachtel
Michael H Quinn
Joshua Wallach
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jessen Wesley Corp, Novartis Ag, Gregory Carlson, Edgar Alan Blair, Peter Wachtel, Michael H Quinn, Joshua Wallach filed Critical Jessen Wesley Corp
Priority to DE60110422T priority Critical patent/DE60110422T2/en
Priority to AT01945309T priority patent/ATE294199T1/en
Priority to AU2001267563A priority patent/AU2001267563A1/en
Priority to JP2002505871A priority patent/JP5301756B2/en
Priority to EP01945309A priority patent/EP1299444B1/en
Priority to CA002410411A priority patent/CA2410411A1/en
Publication of WO2002000749A2 publication Critical patent/WO2002000749A2/en
Publication of WO2002000749A3 publication Critical patent/WO2002000749A3/en
Priority to NO20026062A priority patent/NO20026062L/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
    • C08G18/78—Nitrogen
    • C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
    • C08G18/791—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups
    • C08G18/792—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/4833—Polyethers containing oxyethylene units
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
    • C08G18/6666—Compounds of group C08G18/48 or C08G18/52
    • C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/6674—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • G02B1/041—Lenses
    • G02B1/043—Contact lenses
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2120/00—Compositions for reaction injection moulding processes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2210/00—Compositions for preparing hydrogels

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Eyeglasses (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Macromonomer-Based Addition Polymer (AREA)
  • Materials For Medical Uses (AREA)
  • Colloid Chemistry (AREA)

Abstract

A prepolymer is prepared by reacting a mixture containing (a) at least one multifunctional compound, (b) at least one diisocyanate, and (c) at least one diol. The diol has a weight average molecular weight of at most 6000. The prepolymer, when reacted with an excess of water, forms a hydrogel polymer. The mixture of the prepolymer and water may be reaction molded, and used to form a contact lens.
PCT/EP2001/007160 2000-06-26 2001-06-25 Polyurethane hydrogel contact lens WO2002000749A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE60110422T DE60110422T2 (en) 2000-06-26 2001-06-25 POLYURETHANE hydrogel
AT01945309T ATE294199T1 (en) 2000-06-26 2001-06-25 POLYURETHANE HYDROGEL CONTACT LENS
AU2001267563A AU2001267563A1 (en) 2000-06-26 2001-06-25 Polyurethane hydrogel contact lens
JP2002505871A JP5301756B2 (en) 2000-06-26 2001-06-25 Polyurethane hydrogel contact lens
EP01945309A EP1299444B1 (en) 2000-06-26 2001-06-25 Polyurethane hydrogel contact lens
CA002410411A CA2410411A1 (en) 2000-06-26 2001-06-25 Polyurethane hydrogel contact lens
NO20026062A NO20026062L (en) 2000-06-26 2002-12-17 Polyurethane hydrogel contact lenses

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US21464900P 2000-06-26 2000-06-26
US60/214,649 2000-06-26

Publications (2)

Publication Number Publication Date
WO2002000749A2 WO2002000749A2 (en) 2002-01-03
WO2002000749A3 true WO2002000749A3 (en) 2002-05-16

Family

ID=22799906

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/007160 WO2002000749A2 (en) 2000-06-26 2001-06-25 Polyurethane hydrogel contact lens

Country Status (9)

Country Link
US (1) US6930196B2 (en)
EP (1) EP1299444B1 (en)
JP (1) JP5301756B2 (en)
AT (1) ATE294199T1 (en)
AU (1) AU2001267563A1 (en)
CA (1) CA2410411A1 (en)
DE (1) DE60110422T2 (en)
NO (1) NO20026062L (en)
WO (1) WO2002000749A2 (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0220312D0 (en) * 2002-08-31 2002-10-09 Graham Neil Novel thermoplastic hydrogel polymer compositions for use in producing contact lenses and methods of producing said compositions
GB0220313D0 (en) * 2002-08-31 2002-10-09 Graham Neil Novel thermoplastic hydrogel polmer compositions and methods of producing said compositions
US20060074182A1 (en) * 2004-09-30 2006-04-06 Depuy Products, Inc. Hydrogel composition and methods for making the same
EP1657267A1 (en) 2004-11-10 2006-05-17 INSA (Institut National des Sciences Appliqées) Two-part polyisocyanate/polyol composition and its use for making casted products, in particular ophthalmic lenses
US7559949B2 (en) * 2006-04-28 2009-07-14 Leonard Pinchuk Injectable intraocular lens that minimizes posterior capsule opacification and methods and materials for realizing same
CN101821309A (en) 2007-10-15 2010-09-01 三井化学株式会社 Polyurethane resin
US20100227985A1 (en) 2007-10-15 2010-09-09 Mitsui Chemicals, Inc. Granular polyurethane resin composition and molded article of the same
US20100305294A1 (en) * 2007-11-28 2010-12-02 Mitsui Chemicals, Inc. Polyurethane resin composition for reaction injection molding and molded article
US20090220578A1 (en) * 2008-02-28 2009-09-03 Depuy Products, Inc. Hydrogel composition and method for making the same
US20090309266A1 (en) * 2008-06-13 2009-12-17 Peter Thomas H Reaction injection molding system and processes for producing polyurethane articles
DE102009005711A1 (en) * 2009-01-22 2010-07-29 Bayer Materialscience Ag Polyurethanvergussmassen
WO2011051690A2 (en) * 2009-11-02 2011-05-05 Ocutec Limited Polymers for contact lenses
WO2011051689A2 (en) 2009-11-02 2011-05-05 Ocutec Limited Polymers for contact lenses
GB0919459D0 (en) 2009-11-06 2009-12-23 Ocutec Ltd Polymer for contact lenses
GB0919411D0 (en) 2009-11-05 2009-12-23 Ocutec Ltd Polymer for contact lenses
GB201018190D0 (en) * 2010-10-27 2010-12-08 Ocutec Ltd Polymer for contact lenses
GB201106778D0 (en) * 2011-04-21 2011-06-01 Ocutec Ltd Polymers for contact lenses
GB201106774D0 (en) 2011-04-21 2011-06-01 Occutec Ltd Polymers for contact lenses
US10335315B2 (en) * 2013-02-01 2019-07-02 Alcon Lensx, Inc. Bi-radial patient interface
CN105859995B (en) * 2016-05-04 2018-07-27 湖南科技大学 A kind of preparation method of intelligent response type polyurethane hydrogel
CN105801809B (en) * 2016-05-04 2018-08-03 湖南科技大学 A kind of preparation method of Dual Sensitive type polyurethane hydrogel
CN106084258B (en) * 2016-07-05 2019-04-09 湖南科技大学 A kind of preparation method for the polyurethane hydrogel having both two class pH sensitive groups
CN105906782B (en) * 2016-07-05 2018-04-03 湖南科技大学 The preparation method of polyurethane hydrogel with both sexes pH response groups
CN105906781B (en) * 2016-07-05 2018-04-03 湖南科技大学 A kind of preparation method of amphoteric ion type polyurethane hydrogel
CN106046311B (en) * 2016-07-05 2018-06-22 湖南科技大学 A kind of preparation method of amphoteric ion type intelligent response hydrogel
WO2018236743A1 (en) 2017-06-19 2018-12-27 Dsm Ip Assets, B.V. Thermosetting composition for forming components of rigid, gas permeable lenses
WO2019070780A1 (en) 2017-10-03 2019-04-11 Dsm Ip Assets, B.V. Compositions and kits for forming rigid lens components comprising a derivative of cellulose

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3719050A (en) * 1970-06-01 1973-03-06 Toho Chem Ind Co Ltd Soil stabilization method
FR2539135A1 (en) * 1983-01-11 1984-07-13 Essilor Int POLYURETHANE HYDROGELS AND PROCESS FOR PRODUCING THE SAME
EP0189484A1 (en) * 1984-06-29 1986-08-06 Asahi Denka Kogyo Kabushiki Kaisha Water-swellable sealantand method of preparation
US4810582A (en) * 1985-11-12 1989-03-07 Tyndale Plains-Hunter Ltd. Hydrophilic polyurethane composition
US4886866A (en) * 1987-12-21 1989-12-12 W. R. Grace & Co.-Conn. Contact lenses based on biocompatible polyurethane and polyurea-urethane hydrated polymers

Family Cites Families (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3786034A (en) 1972-06-23 1974-01-15 Frigitronics Of Conn Inc Polyurethane polymers for use in soft lenses and method of producing soft lenses
US3821136A (en) 1972-06-23 1974-06-28 Princeton Polymer Lab Water absorbtive polyurethane polymers
US3822238A (en) 1972-08-02 1974-07-02 Princeton Polymer Lab Hydrophilic polyurethane polymers
US4118354A (en) 1972-11-24 1978-10-03 Dai-Ichi Kogyo Seiyaku Co., Ltd. Polyurethane hydrogel and method for the production of the same
DE2426988C2 (en) * 1974-06-04 1985-02-14 Boehringer Mannheim Gmbh, 6800 Mannheim Method for carrier binding of biologically active proteins
US3940542A (en) * 1974-06-18 1976-02-24 Union Carbide Corporation Polyurethane hydrogel fibers and tapes and composites with natural and other synthetic fibers or films
US3939105A (en) 1974-06-18 1976-02-17 Union Carbide Corporation Microporous polyurethane hydrogels, method and composites with natural and other synthetic fibers or films
US3939123A (en) * 1974-06-18 1976-02-17 Union Carbide Corporation Lightly cross-linked polyurethane hydrogels based on poly(alkylene ether) polyols
US4209605A (en) * 1978-10-19 1980-06-24 Union Carbide Corporation Process for producing shaped polyurethane hydrogel articles
US4255550A (en) 1978-12-22 1981-03-10 Tyndale Plains - Hunter Ltd. Polyurethane polymers characterized by carboxylate groups and hydroxyl groups in the polymer backbone
US4403083A (en) 1979-06-01 1983-09-06 W. R. Grace & Co. Preparation of solid polyurethane particles
US4259467A (en) 1979-12-10 1981-03-31 Bausch & Lomb Incorporated Hydrophilic contact lens made from polysiloxanes containing hydrophilic sidechains
US4408023A (en) 1980-11-12 1983-10-04 Tyndale Plains-Hunter, Ltd. Polyurethane diacrylate compositions useful for contact lenses and the like
US4454309A (en) 1980-11-12 1984-06-12 Tyndale Plains-Hunter, Ltd. Polyurethane polyene compositions
US4496535A (en) 1980-11-12 1985-01-29 Tyndale Plains-Hunter, Ltd. Polyurethane polyene compositions
US4490423A (en) 1980-11-12 1984-12-25 Tyndale Plains-Hunter, Ltd. Polyurethane polyene compositions
US4359558A (en) 1980-11-12 1982-11-16 Tyndale Plains-Hunter, Ltd. Polyurethane diacrylate compositions
GB8428109D0 (en) 1984-11-07 1984-12-12 Biocompatibles Ltd Biocompatible surfaces
US4687816A (en) 1985-08-14 1987-08-18 Sola U.S.A. Inc. Surface treatment of soft contact lenses
US4668564A (en) 1985-12-26 1987-05-26 Spenco Medical Corporation Hydrogel materials for hot and cold therapy and method for forming same
US5169720A (en) * 1986-11-18 1992-12-08 W. R. Grace & Co.-Conn. Protein non-adsorptive polyurea-urethane polymer coated devices
US5149052A (en) 1987-11-16 1992-09-22 Kingston Technologies, Inc. Precision molding of polymers
US5039458A (en) 1987-12-21 1991-08-13 W. R. Grace & Co.-Conn. Method of making a hydrophilic, biocompatible, protein non-adsorptive contact lens
JPH01249820A (en) * 1988-03-31 1989-10-05 Dainippon Ink & Chem Inc Gel-like hydrous urethane resin composition
US5059424A (en) * 1989-11-01 1991-10-22 Ndm Acquisition Corp. Hydrogel wound dressing product
US5403750A (en) * 1991-03-06 1995-04-04 W. R. Grace & Co.-Conn. Biocompatible, low protein adsorption affinity matrix
US5354835A (en) 1993-07-23 1994-10-11 Saudi Basic Industries Corporation Desalination process
TW272976B (en) 1993-08-06 1996-03-21 Ciba Geigy Ag
US5674942A (en) 1995-03-31 1997-10-07 Johnson & Johnson Vision Products, Inc. Interpenetrating polymer networks for contact lens production
AT406735B (en) 1996-06-27 2000-08-25 Atomic Austria Gmbh SKI COUPLE FOR ALPINE SKIING
NZ337346A (en) 1997-03-25 2001-06-29 Novartis Ag Two-part mold comprising a crosslinked polymer formed by exposure to UV light
JPH11255859A (en) 1998-03-13 1999-09-21 Tadao Nakaya Polyurethane, lens material for spectacles, material for contact lens, lens and preparation of polyurethane
US6039913A (en) 1998-08-27 2000-03-21 Novartis Ag Process for the manufacture of an ophthalmic molding

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3719050A (en) * 1970-06-01 1973-03-06 Toho Chem Ind Co Ltd Soil stabilization method
FR2539135A1 (en) * 1983-01-11 1984-07-13 Essilor Int POLYURETHANE HYDROGELS AND PROCESS FOR PRODUCING THE SAME
EP0189484A1 (en) * 1984-06-29 1986-08-06 Asahi Denka Kogyo Kabushiki Kaisha Water-swellable sealantand method of preparation
US4810582A (en) * 1985-11-12 1989-03-07 Tyndale Plains-Hunter Ltd. Hydrophilic polyurethane composition
US4886866A (en) * 1987-12-21 1989-12-12 W. R. Grace & Co.-Conn. Contact lenses based on biocompatible polyurethane and polyurea-urethane hydrated polymers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JOURNAL OF APPLIED POLYMER SCIENCE, vol. 59, no. 3, 18 January 1996 (1996-01-18), New York, US, pages 459 - 466, XP000556508 *

Also Published As

Publication number Publication date
US6930196B2 (en) 2005-08-16
DE60110422D1 (en) 2005-06-02
WO2002000749A2 (en) 2002-01-03
US20020032297A1 (en) 2002-03-14
ATE294199T1 (en) 2005-05-15
AU2001267563A1 (en) 2002-01-08
JP5301756B2 (en) 2013-09-25
NO20026062D0 (en) 2002-12-17
DE60110422T2 (en) 2006-02-16
NO20026062L (en) 2003-02-03
EP1299444A2 (en) 2003-04-09
JP2004501997A (en) 2004-01-22
CA2410411A1 (en) 2002-01-03
EP1299444B1 (en) 2005-04-27

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