US5085934A
Expired / Lapsed
US
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Reversible thermosensitive recording material
Assignee: Ricoh Co Ltd
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Filing: 1990-05-04
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Granted: 1992-02-04
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Expires: 2010-05-04
Abstract
Abstract A reversible thermosensitive recording material comprising (a) a support, and (b) a reversible thermosensitive recording layer formed thereon, which comprises a matrix resin, and low-molecular-weight components of (i) at least one higher fatty acid having 16 or more carbon atoms and (ii) at least one aliphatic saturated dicarboxylic acid having 20 or more carbon atoms, dispersed in the matrix resin, with the ratio by weight of the amount of the higher fatty acid to the amount of the aliphatic saturated dicarboxylic acid being in the range of 95:5 to 50:50.
Inventors
- 👤 Yoshihiko Hotta
- 👤 Syoji Maruyama
- 👤 Makoto Kawaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:11
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/36; B41M5/363; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31551; Y10T428/31652; Y10T428/31663; Y10T428/31725; Y10T428/31786; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
90 words
A reversible thermosensitive recording material comprising: (a) a support, and (b) a reversible thermosensitive recording layer formed thereon, which comprises a matrix resin, and low-molecular-weight components of (i) at least one higher fatty acid having 16 or more carbon atoms and (ii) at least one aliphatic saturated dicarboxylic acid having 20 or more carbon atoms, dispersed in said matrix resin, with the ratio by weight of the amount of said higher fatty acid to the amount of said aliphatic saturated dicarboxylic acid being in the range of 95:5 to 50:50.
Claim 2
Dependent Claim
90 words
A reversible thermosensitive recording material comprising: (a) a support, and (b) a reversible thermosensitive recording layer formed thereon, which comprises a matrix resin, and low-molecular-weight components of (i) at least one higher fatty acid having 16 or more carbon atoms and (ii) at least one aliphatic saturated dicarboxylic acid having 20 or more carbon atoms, dispersed in said matrix resin, with the ratio by weight of the amount of said higher fatty acid to the amount of said aliphatic saturated dicarboxylic acid being in the range of 95:5 to 50:50.
Claim 3
Dependent Claim
45 words
The reversible thermosensitive recording material as claimed in claim 1, wherein the ratio by weight of the total amount of said higher fatty acid and said aliphatic saturated dicarboxylic acid to the amount of said matrix resin is in the range of 2:1 to 1:16.
Claim 4
Dependent Claim
28 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said reversible thermosensitive recording layer has a thickness in the range of 1 μm to 30 μm.
Claim 5
Dependent Claim
82 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said matrix resin is selected from the group consisting of polyvinyl chloride, a vinyl chloride - vinyl acetate copolymer, a vinyl chloride - vinyl acetate - vinyl alcohol copolymer, a vinyl chloride - vinyl acetate - maleic acid copolymer, a vinyl chloride - acrylate copolymer, polyvinylidene chloride, a vinylidene chloride-vinyl chloride copolymer, a vinylidene chloride - acrylo-nitrile copolymer, polyester, polyamide, polyacrylate, polymethacrylate, an acrylate - methacrylate copolymer, and a silicone resin.
Claim 6
Dependent Claim
91 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said higher fatty acid is selected from the group consisting of palmitic acid, margaric acid, stearic acid, nonadecanoic acid, eicosanic acid, heneicosanic acid, behenic acid, lignoceric acid, pentacosanoic acid, cerotic acid, heptacosanoic acid, montanic acid, nonacosanoic acid, melissic acid, 2-hexadecenoic acid, trans-3-hexadecenoic acid, 2-heptadecenoic acid, trans-2-octadecenoic acid, cis-2-octadecanoic acid, trans-4-octadecenoic acid, cis-6-octadecenoic acid, elaidic acid, trans-11-octadecenoic acid, trans-11-eicosenoic acid, erucic acid, brassidic acid, selacholeic acid, trans-selacholeic acid, trans-8,trans-10-octadecadienoic acid, linoelaidic acid, α-eleostearic acid, 8-eleostearic acid, pseudoeleostearic acid, and 12,20-heneicosadienoic acid.
Claim 7
Dependent Claim
34 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said aliphatic saturated dicarboxylic acid has the formula of HOOC(CH 2 ) n- 2COOH, wherein n is an integer of 20 or more.
Claim 8
Dependent Claim
38 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said aliphatic saturated dicarboxylic acid is selected from the group consisting of eicosanedloic acid, heneicosanedoic acid, docosanedioic acid, tricosanedioic acid, tetracosanedioic acid, pentacosanedioic acid and hexacosanedioic acid.
Claim 9
Dependent Claim
57 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said reversible thermosensitive recording layer further comprises a plasticizer in such an amount that the ratio by weight of the total amount of said higher fatty acid and said aliphatic saturated dicarboxylic acid to the amount of said plasticizer in the range of 1:0.01 to 1:0.8.
Claim 10
Dependent Claim
77 words
The reversible thermosensitive recording material as claimed in claim 8, wherein said plasticizer is selected from the group consisting of tributyl phosphate, tri-2-ethylhexyl phosphate, triphenyl phosphate, tricresyl phosphate, butyl oleate, dimethyl phthalate, diethyl phthalate, dibutyl phthalate, diheptyl phthalate, di-n-octyl phthalate, di-2-ethylhexyl phthalate, diisononyl phthalate, dioctyldecyl phthalate, diisodecyl phthalate, butylbenzyl phthalate, dibutyl adipate, di-n-hexyl adipate, di-2-ethyl-hexyl adipate, di-2-ethylhexyl azelate, dibutyl cebacate, di-2-ethylhexyl cebacate, diethylene glycol dibenzoate, triethylene glycol-2-ethyl butylate, methyl acetylricinoleate, butyl acetylricinoleate, butylphthalyl butylglycolate, and tributyl acetylcitrate.
Claim 11
Dependent Claim
22 words
The reversible thermosensitive recording material as claimed in claim 1, further comprising a protective layer formed on said reversible thermosensitive recording layer.
Claim 12
Dependent Claim
45 words
The reversible thermosensitive recording material as claimed in claim 10, wherein said protective layer is made from a material selected from the group consisting of an urethane acrylate based ultraviolet-curing resin, a silicone rubber, a silicone resin, a polysiloxane grafted polymer, and a polyamide resin.
References Cited (Backward Citations)
US4917948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-03 | 1995-08-05 | 1996-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-03 | 1999-08-05 | 2000-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-03 | 2003-08-05 | 2004-02-04 | $7700.00 | Window Closed / Lapsed |