EP0111335A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Heat-sensitive recording material
Assignee: New Oji Paper Co Ltd
•
Filing: 1983-12-09
•
Granted: —
•
Expires: 2003-12-09
Abstract
Abstract 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, and 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 another copolymerizable monomer.
Inventors
- 👤 Yukio Takayama
- 👤 Akio Noguchi
- 👤 Takao Matsushita
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 13:39
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: 6
Claim 1
Independent Claim
64 words
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, characterized in that the resin is essentially composed of an acetoacetylated polyvinyl alcohol and/or a copolymer of vinyl alcohol, acrylonitrile and optionally another copolymerizable monomer.
Claim 2
Dependent Claim
64 words
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, characterized in that the resin is essentially composed of an acetoacetylated polyvinyl alcohol and/or a copolymer of vinyl alcohol, acrylonitrile and optionally another copolymerizable monomer.
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
24 words
A heat-sensitive recording material as defined in claim 1 or 2 wherein the acrylonitrile units content in the copolymer is 0.5 to 45 mole%.
Claim 5
Dependent Claim
21 words
A heat-sensitive recording material as defined in any of claims 1-3 wherein a curing agent is further added to the resin.
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.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.