WO2002002700B1 - Erasable inks, writing instruments, and methods - Google Patents

Erasable inks, writing instruments, and methods

Info

Publication number
WO2002002700B1
WO2002002700B1 PCT/US2001/021025 US0121025W WO0202700B1 WO 2002002700 B1 WO2002002700 B1 WO 2002002700B1 US 0121025 W US0121025 W US 0121025W WO 0202700 B1 WO0202700 B1 WO 0202700B1
Authority
WO
WIPO (PCT)
Prior art keywords
ink
pigment
solvent
microns
erasable
Prior art date
Application number
PCT/US2001/021025
Other languages
French (fr)
Other versions
WO2002002700A2 (en
WO2002002700A3 (en
Inventor
Jean L Spencer
Pawel Czubarow
Original Assignee
Berol Corp
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 Berol Corp filed Critical Berol Corp
Priority to DE60107683T priority Critical patent/DE60107683T2/en
Priority to AU2001271756A priority patent/AU2001271756A1/en
Priority to EP01950796A priority patent/EP1299485B1/en
Priority to JP2002507946A priority patent/JP2004502821A/en
Publication of WO2002002700A2 publication Critical patent/WO2002002700A2/en
Publication of WO2002002700A3 publication Critical patent/WO2002002700A3/en
Publication of WO2002002700B1 publication Critical patent/WO2002002700B1/en

Links

Classifications

    • 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
    • C09D11/00—Inks
    • C09D11/16—Writing inks
    • C09D11/18—Writing inks specially adapted for ball-point writing instruments
    • 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
    • C09D11/00—Inks
    • C09D11/16—Writing inks

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Pens And Brushes (AREA)

Abstract

Erasable inks are provided for use in a writing instruments. In one aspect, the inks include a solvent, and, dispersed in the solvent as a colorant, a pigment having a flake-like morphology, the ink being substantially free of other colorants.

Claims

33
AMENDED CLAIMS
[received by the International Bureau on 8 March 2002 (08.03.02); original claims 1, 8, 14 and 21-26 amended; original claims 7, 13 and 20 cancelled; new claims 27 and 28 added; remaining claims unchanged (5 pages)]
1. An erasable ink for use in a writing instrument, comprising: a solvent, and a pigment having a flake-like morphology dispersed in the solvent, wherein the ink is substantially free of colorants other than said pigment, and wherein said ink has a shear-thinning index of between about 0.01 and about 0.8.
2. The ink of claim 1 wherein said pigment is a pearlescent pigment.
3. The ink of claim 1 wherein said pigment is selected from the group consisting of metal-oxide coated micas, graphites, and metal flake pigments.
4. The ink of claim 1 wherein said pigment has an average diameter from about 3 microns to about 12 microns.
5. The ink of claim 1 wherein said ink exhibits an erasability of at least about 80%.
6. The ink of claim 1 wherein said solvent comprises an aqueous solvent system.
8. An erasable ink for use in a writing instrument, comprising: a solvent, and a flake-like pigment having an average diameter from about 3 microns to about 12 microns dispersed in the solvent, wherein said ink has a shear-thinning index of between about 0.01 and about 0.8.
9. The ink of claim 7 wherein said pigment is a pearlescent pigment.
10. The ink of claim 7 wherein said pigment is selected from the group consisting of metal-oxide coated micas, graphites, and metal flake pigments.
11. The ink of claim 7 wherein said ink exhibits an erasability of at least about 80%.
12. The ink of claim 7 wherein said solvent comprises an aqueous solvent system.
14. An erasable ink for use in a writing instrument, comprising: a solvent, and a flake-like pigment having an average thickness of less than about 0.25 microns dispersed in the solvent, wherein said ink has a shear-thinning index of between about 0.01 and about 0.8.
15. The ink of claim 14 wherein said pigment is a pearlescent pigment.
16. The ink of claim 14 wherein said pigment is selected from the group consisting of metal-oxide coated micas, graphites, and metal flake pigments.
17. The ink of claim 14 wherein said pigment has an average diameter from about 3 microns to about 12 microns.
18. The ink of claim 14 wherein said ink exhibits an erasability of at least about 80%.
19. The ink of claim 14 wherein said solvent comprises an aqueous solvent system. 35
21. A method of forming an erasable marking on a paper substrate, comprising: making a marking on the substrate with a writing instrument containing an erasable ink comprising a solvent and a pigment having a flake-like moφhology dispersed in the solvent, wherein the ink is substantially free of colorants other than said pigment, and wherein said ink has a shear-thinning index of between about 0.01 and about 0.8.
22. A method of forming an erasable marking on a paper substrate, comprising: making a marking on the substrate with a writing instrument containing an erasable ink comprising a solvent and a flake-like pigment having an average diameter from about 3 microns to about 12 microns dispersed in the solvent, wherein said ink has a shear-thinning index of between about 0.01 and about 0.8.
23. A method of forming an erasable marking on a paper substrate, comprising: making a marking on the substrate with a writing instrument containing an erasable ink comprising a solvent and a flake-like pigment having an average thickness of less than about 0.25 microns dispersed in the solvent, wherein said ink has a shear-thinning index of between about 0.01 and about 0.8.
24. A writing instrument, comprising: a reservoir containing an erasable ink comprising a solvent and a pigment having a flake-like moφhology dispersed in the solvent, wherein the ink is substantially free of colorants other than said pigment, and wherein said ink has a shear-thinning index of between about 0.01 and about 0.8.
25. A writing instrument, comprising: a reservoir containing an erasable ink comprising a solvent and a flake- 36
like pigment having an average diameter from about 3 microns to about 12 microns dispersed in the solvent, wherein said ink has a shear- thinning index of between about 0.01 and about 0.8.
37
26. A writing instrument, comprising: a reservoir containing an erasable ink comprising a solvent and a flakelike pigment having an average thickness of less than about 0.25 microns dispersed in the solvent, wherein said ink has a shear-thinning index of between about 0.01 and about 0.8.
27. An erasable ink for use in a writing instrument, comprising: a solvent, a pigment having a flake-like moφhology dispersed in the solvent, wherein the ink is substantially free of colorants other than said pigment, and a shear-thinning additive selected from the group consisting of clays, organoclays, water dispersible gums, and high molecular weight polymers of acrylic acid.
28. The ink of claim 27 wherein said solvent comprises an aqueous solvent system.
STATEMENT UNDER ARTICLE 19(1)
Transmitted herewith are substitute pages 29-31, 31/1, and 32, which have been amended pursuant to Article 19 of the Patent Cooperation Treaty. According to the amendments, original claims 1, 8, 14, and 21-26 have been amended, original claims 7, 13, and 20 have been cancelled, and new claims 27 and 28 have been added. Claims 2-6, 9-12, and 15-19 remain unchanged by these amendments. The claims have not been renumbered.
Support for the amendment to claims 1, 8, 14, and 21-26 is found, for example, in original claims 7, 13, and 20 and at page 9, lines 27-28. Support for the amendment adding claim 27 is found, for example, in original claim 1 and at page 10, line 24 - page 12, line 6; support for newly added claim 28 is found, for example, in original claim 6. Accordingly, no new matter has been included.
In accordance with Rule 62.2, copies of the present amendment and
accompanying statement will also be filed with the International Preliminary Examining Authority (EP).
Entry of the foregoing amendments is earnestly solicited.
PCT/US2001/021025 2000-07-03 2001-07-03 Erasable inks, writing instruments, and methods WO2002002700A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE60107683T DE60107683T2 (en) 2000-07-03 2001-07-03 RADIATABLE INKS, WRITING INSTRUMENTS AND METHOD
AU2001271756A AU2001271756A1 (en) 2000-07-03 2001-07-03 Erasable inks, writing instruments, and methods
EP01950796A EP1299485B1 (en) 2000-07-03 2001-07-03 Erasable inks, writing instruments, and methods
JP2002507946A JP2004502821A (en) 2000-07-03 2001-07-03 Erasable ink, writing implement and method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US60892500A 2000-07-03 2000-07-03
US09/608,925 2000-07-03

Publications (3)

Publication Number Publication Date
WO2002002700A2 WO2002002700A2 (en) 2002-01-10
WO2002002700A3 WO2002002700A3 (en) 2002-05-23
WO2002002700B1 true WO2002002700B1 (en) 2002-06-27

Family

ID=24438653

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/021025 WO2002002700A2 (en) 2000-07-03 2001-07-03 Erasable inks, writing instruments, and methods

Country Status (6)

Country Link
US (2) US6749676B2 (en)
EP (1) EP1299485B1 (en)
JP (1) JP2004502821A (en)
AU (1) AU2001271756A1 (en)
DE (1) DE60107683T2 (en)
WO (1) WO2002002700A2 (en)

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EP1299485B1 (en) 2004-12-08
US20020033116A1 (en) 2002-03-21
WO2002002700A2 (en) 2002-01-10
WO2002002700A3 (en) 2002-05-23
DE60107683T2 (en) 2005-04-28
US6986809B2 (en) 2006-01-17
US20040225032A1 (en) 2004-11-11
DE60107683D1 (en) 2005-01-13
AU2001271756A1 (en) 2002-01-14
EP1299485A2 (en) 2003-04-09
US6749676B2 (en) 2004-06-15
JP2004502821A (en) 2004-01-29

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