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US4513301A
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US
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Heat-sensitive recording material
Assignee: New Oji Paper Co Ltd
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Filing: 1983-12-07
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Granted: 1985-04-23
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Expires: 2003-12-07
Abstract
Abstract In a heat-sensitive recording material in which a resin layer is formed on a recording layer containing at least a color forming material and a color developing material which forms a color when reacted with the color forming material by contact, a heat-sensitive recording material which is characterized in that the resin is essentially composed of an acetoacetylated polyvinyl alcohol and/or a copolymer of vinyl alcohol, acrylonitrile and optionally an other copolymerizable monomer.
Inventors
- 👤 Yukio Takayama
- 👤 Akio Noguchi
- 👤 Takao Matsushita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:07
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/42; B41M5/44; B41M2205/00; B41M2205/04; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906; Y10T428/31935
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
73 words
In a heat-sensitive recording material in which a resin layer is formed on a recording layer containing at least a color forming material and a color developing material which forms a color when reacted with the color forming material by contact, the improvement comprising said resin layer is essentially composed of an acetoacetylated polyvinyl alcohol, a copolymer comprising vinyl alcohol and acrylonitrile or a mixture of said acetoacetylated polyvinyl alcohol and said copolymer.
Claim 2
Dependent Claim
73 words
In a heat-sensitive recording material in which a resin layer is formed on a recording layer containing at least a color forming material and a color developing material which forms a color when reacted with the color forming material by contact, the improvement comprising said resin layer is essentially composed of an acetoacetylated polyvinyl alcohol, a copolymer comprising vinyl alcohol and acrylonitrile or a mixture of said acetoacetylated polyvinyl alcohol and said copolymer.
Claim 3
Dependent Claim
23 words
A heat-sensitive recording material as defined in claim 1 wherein the degree of acetoacetylation of the polyvinyl alcohol is 0.1 to 20 mole%.
Claim 4
Dependent Claim
22 words
A heat-sensitive recording material as defined in claim 1 wherein the acrylonitrile units content in the copolymer is 0.5 to 45 mole%.
Claim 5
Dependent Claim
20 words
A heat-sensitive recording material as defined in claim 1 wherein a curing agent is further added to the resin layer.
Claim 6
Dependent Claim
31 words
A heat-sensitive recording material as defined in claim 4 wherein the amount of the curing agent is 0.001 to 100 parts by weight per 100 parts by weight of the resin.
Claim 7
Dependent Claim
17 words
A heat-sensitive recording material as defined in claim 1, wherein said copolymer further comprises another copolymerizable monomer.
References Cited (Backward Citations)
US4370370A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-22 | 1988-10-22 | 1989-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-22 | 1992-10-22 | 1993-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-22 | 1996-10-22 | 1997-04-23 | $7700.00 | Window Closed / Lapsed |