US4125675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color developing sheet with organic developer and latex binder
Assignee: Sumika Polycarbonate Ltd
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Filing: 1976-11-26
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Granted: 1978-11-14
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Expires: 1996-11-26
Abstract
Abstract A color developer sheet sensitized in a color developing property on contact with a chromogenic material and improved in the light-resistance of the developed color, which comprises a support sheet and a coating composition comprising an organic color developer and, as a binder, a latex of a copolymer prepared by polymerization of a mixture essentially consisting of about 20 to 70% by weight of one or more aliphatic conjugated diolefin monomers, about 0.5 to 15% by weight of one or more unsaturated carboxylic acid monomers and about 15 to 79.5% by weight of one or more other olefin monomers copolymerizable with them and having a gel content of about 95 to 100% by weight applied onto a surface of the said support sheet to make a color developer layer.
Inventors
- 👤 Sadao Sekiguchi
- 👤 Kojiro Matsumoto
- 👤 Tetsuo Ishikawa
- 👤 Saburo Mishiba
- 👤 Nobujiro Izaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:09
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/155; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31779; Y10T428/31783; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31906; Y10T428/31909; Y10T428/31913; Y10T428/31917; Y10T428/3192; Y10T428/31928; Y10T428/31931; Y10T428/31935; Y10T428/31938
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
116 words
A color developer sheet sensitized in a color developing property on contact with a chromogenic material comprising a support sheet and a color developer layer comprising an organic color developer and a binder provided on a surface of the said support sheet, wherein the binder is a latex of a copolymer prepared by polymerization of a mixture consisting essentially of about 20 to 70% by weight of at least one aliphatic conjugated diolefin monomer, about 0.5 to 15% by weight of at least one unsaturated carboxylic acid monomer and about 15 to 79.5% by weight of at least one other copolymerizable olefin monomer, said copolymer having a gel content of about 95 to 100% by weight.
Claim 2
Dependent Claim
116 words
A color developer sheet sensitized in a color developing property on contact with a chromogenic material comprising a support sheet and a color developer layer comprising an organic color developer and a binder provided on a surface of the said support sheet, wherein the binder is a latex of a copolymer prepared by polymerization of a mixture consisting essentially of about 20 to 70% by weight of at least one aliphatic conjugated diolefin monomer, about 0.5 to 15% by weight of at least one unsaturated carboxylic acid monomer and about 15 to 79.5% by weight of at least one other copolymerizable olefin monomer, said copolymer having a gel content of about 95 to 100% by weight.
Claim 3
Dependent Claim
21 words
The color developer sheet according to claim 1, wherein the copolymer gel content is from about 98 to 100% by weight.
Claim 4
Dependent Claim
22 words
The color developer sheet according to claim 1, wherein the aliphatic conjugated diolefin monomer is one having 4 to 10 carbon atoms.
Claim 5
Dependent Claim
23 words
The color developer sheet according to claim 1, wherein the unsaturated carboxylic acid monomer is one having not more than 16 carbon atoms.
Claim 6
Dependent Claim
23 words
The color developer sheet according to claim 1, wherein the other copolymerizable olefin monomer is one having not more than 16 carbon atoms.
Claim 7
Dependent Claim
47 words
The color developer sheet according to claim 1, wherein a monomer having at least two ethylenic unsaturated bonds per each molecule is used as the other olefin monomer in an amount of not more than about 5% by weight based on the total weight of the monomers.
Claim 8
Dependent Claim
24 words
The color developer sheet according to claim 1, wherein the copolymer latex has a solids content of from about 20 to 60% by weight.
Claim 9
Dependent Claim
124 words
A color developer sheet comprising a support sheet and a color developer layer comprising an organic color developer and a binder provided on a surface of the said support sheet, wherein the binder is a latex of a copolymer prepared by polymerization of a mixture consisting essentially of about 30 to 49% by weight of at least one aliphatic conjugated diolefin monomer having 4 to 10 carbon atoms, about 0.5 to 15% by weight of at least one unsaturated carboxylic acid monomer having not more than 16 carbon atoms and about 15 to 79.5% by weight of at least one other copolymerizable olefin monomer having not more than 16 carbon atoms said copolymer having a gel content of about 95 to 100% by weight.
Claim 10
Dependent Claim
124 words
A color developer sheet comprising a support sheet and a color developer layer comprising an organic color developer and a binder provided on a surface of the said support sheet, wherein the binder is a latex of a copolymer prepared by polymerization of a mixture consisting essentially of about 30 to 49% by weight of at least one aliphatic conjugated diolefin monomer having 4 to 10 carbon atoms, about 0.5 to 15% by weight of at least one unsaturated carboxylic acid monomer having not more than 16 carbon atoms and about 15 to 79.5% by weight of at least one other copolymerizable olefin monomer having not more than 16 carbon atoms said copolymer having a gel content of about 95 to 100% by weight.
Claim 11
Dependent Claim
21 words
The color developer sheet according to claim 8, wherein the copolymer gel content is from about 98 to 100% by weight.
Claim 12
Dependent Claim
31 words
The color developer sheet according to claim 8, wherein the other olefin monomer is one selected from the group consisting of aromatic vinylic monomers, acrylic monomers, unsaturated nitriles, acrylamide and N-methylol-acrylamide.
Claim 13
Dependent Claim
47 words
The color developer sheet according to claim 8, wherein a monomer having at least two ethylenic unsaturated bonds per each molecule is used as the other olefin monomer in an amount of not more than about 5% by weight based on the total weight of the monomers.
Claim 14
Dependent Claim
24 words
The color developer sheet according to claim 8, wherein the copolymer latex has a solids content of from about 10 to 60% by weight.
Claim 15
Dependent Claim
124 words
A color developer sheet sensitized in a color developing property on contact with a chromogenic material comprising a support sheet and a color developer layer comprising an organic color developer and a binder provided on a surface of the said support sheet, wherein the binder is a latex of a copolymer prepared by polymerization of a mixture consisting essentially of about 30 to 49% by weight of 1,3-butadiene, about 1 to 5% by weight of at least one unsaturated carboxylic acid having not more than 16 carbon atoms and about 15 to 79.5% by weight of at least one monomer selected from the group consisting of styrene, methyl methacrylate and acrylonitrile said copolymer having a gel content of about 98 to 100% by weight.
Claim 16
Dependent Claim
124 words
A color developer sheet sensitized in a color developing property on contact with a chromogenic material comprising a support sheet and a color developer layer comprising an organic color developer and a binder provided on a surface of the said support sheet, wherein the binder is a latex of a copolymer prepared by polymerization of a mixture consisting essentially of about 30 to 49% by weight of 1,3-butadiene, about 1 to 5% by weight of at least one unsaturated carboxylic acid having not more than 16 carbon atoms and about 15 to 79.5% by weight of at least one monomer selected from the group consisting of styrene, methyl methacrylate and acrylonitrile said copolymer having a gel content of about 98 to 100% by weight.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-13 | 1982-05-15 | 1982-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-13 | 1986-05-15 | 1986-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-13 | 1990-05-15 | 1990-11-14 | $7700.00 | Window Closed / Lapsed |