US4228222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-sensitive record material
Assignee: New Oji Paper Co Ltd
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Filing: 1979-03-21
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Granted: 1980-10-14
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Expires: 1999-03-21
Abstract
Abstract The heat-sensitive record material comprises a base sheet and a color developing layer formed on at least one surface of said base sheet, said color developing layer comprising electron donating color forming material and acceptor reactive with said color forming material to develop a color, said color developing layer further including as a binder water soluble resinous material having carboxyl radicals, partly in the form of magnesium salt and partly in the form of another salt.
Inventors
- 👤 Takeshi Murakami
- 👤 Teruo Nakamura
- 👤 Hisanori Yagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:25
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3372; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24835; Y10T428/24893; Y10T428/24901; Y10T428/31504; Y10T428/31855
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
189 words
In a heat-sensitive record material comprising a base sheet and a color developing layer formed on at least one surface of said base sheet, said color developing layer comprising electron donating color forming material and acceptor which is reactive with said color forming material to develop a color, the improvement in said color developing layer further including as a binder water soluble resinous material having carboxyl radicals, at least 35% of said carboxyl radicals neutralized by alkaline materials to form magnesium salt and at least one other salt which is a member selected from the group consisting of sodium salt, potassium salt, ammonium salt and amine salt, 30 to 80% of the total carboxyl radicals existing in the form of magnesium salt and 5 to 70% of the total carboxyl radicals existing in the form of said other salt; wherein said water soluble resinous material having carboxyl radicals comprises a copolymer made by copolymerization of at least one ethylenic monomer, at least one conjugated diolefinic monomer and at least one unsaturated carboxylic acid; and wherein said unsaturated carboxylic acid component comprises 30 to 70% by weight of said copolymer.
Claim 2
Dependent Claim
189 words
In a heat-sensitive record material comprising a base sheet and a color developing layer formed on at least one surface of said base sheet, said color developing layer comprising electron donating color forming material and acceptor which is reactive with said color forming material to develop a color, the improvement in said color developing layer further including as a binder water soluble resinous material having carboxyl radicals, at least 35% of said carboxyl radicals neutralized by alkaline materials to form magnesium salt and at least one other salt which is a member selected from the group consisting of sodium salt, potassium salt, ammonium salt and amine salt, 30 to 80% of the total carboxyl radicals existing in the form of magnesium salt and 5 to 70% of the total carboxyl radicals existing in the form of said other salt; wherein said water soluble resinous material having carboxyl radicals comprises a copolymer made by copolymerization of at least one ethylenic monomer, at least one conjugated diolefinic monomer and at least one unsaturated carboxylic acid; and wherein said unsaturated carboxylic acid component comprises 30 to 70% by weight of said copolymer.
Claim 3
Dependent Claim
30 words
A heat-sensitive record material as defined in claim 1, in which said electron donating color forming material is colorless chromogenic material and said acceptor is inorganic or organic acidic material.
Claim 4
Dependent Claim
24 words
A heat-sensitive record material as defined in claim 1 wherein said salt which is other than magnesium salt is sodium salt or potassium salt.
Claim 5
Dependent Claim
46 words
A heat-sensitive record material as defined in claim 1 wherein said ethylenic monomer is selected from the group consisting of linear or branched olefins having 2 to 25 carbon atoms, aromatic vinyl compounds, vinyl cyanide compounds, alkyl acrylates, methacrylates, vinyl ethers, vinyl halides and vinyl acetate.
Claim 6
Dependent Claim
37 words
A heat-sensitive record material as defined in claim 4 wherein said ethylenic monomer is selected from the group consisting of linear or branched olefins having 2 to 25 carbon atoms, aromatic vinyl compounds, alkyl acrylates and methacrylates.
Claim 7
Dependent Claim
27 words
A heat-sensitive record material as defined in claim 5 wherein said ethylenic monomer is selected from the group consisting of ethylene, styrene, methylacrylate, butyl acrylate and methacrylate.
Claim 8
Dependent Claim
36 words
A heat-sensitive record material as defined in claim 1 wherein said conjugated diolefinic monomer comprises a monomer having 4 to 10 carbon atoms and is selected from the group consisting of butadiene, isoprene, chloroprene and piperylene.
Claim 9
Dependent Claim
16 words
A heat-sensitive record material as defined in claim 7 wherein said conjugated diolefinic monomer is butadiene.
Claim 10
Dependent Claim
34 words
A heat-sensitive record material as defined in claim 1 wherein said unsaturated carboxylic acid is selected from the group consisting of acrylic acid, methacrylic acid, crotonic acid, itaconic acid, maleic acid and fumaric acid.
Claim 11
Dependent Claim
28 words
A heat-sensitive record material as defined in claim 9 wherein said unsaturated carboxylic acid is selected from the group consisting of acrylic acid, methacrylic acid and maleic acid.
Claim 12
Dependent Claim
23 words
A heat-sensitive record material as defined in claim 1 wherein at least 90% of said carboxyl radicals are neutralized by said alkaline materials.
Claim 13
Dependent Claim
23 words
A heat-sensitive record material as defined in claim 11 wherein at least 95% of said carboxyl radicals are neutralized by said alkaline materials.
Claim 14
Dependent Claim
47 words
A heat-sensitive record material as defined in claim 1 wherein said water soluble resinous material is in the color developing layer in an amount between 10 and 40% by weight on a dry basis of the total amount of the solid components of said color developing layer.
Claim 15
Dependent Claim
47 words
A heat-sensitive record material as defined in claim 13 wherein said water soluble resinous material is in the color developing layer in an amount between 15 to 30% by weight on a dry basis of the total amount of the solid components of said color developing layer.
References Cited (Backward Citations)
US3874895A
Cited
US3950595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |