US5178669A
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Composition for reversible thermal recording media
Assignee: Toppan Inc
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Filing: 1990-04-06
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Granted: 1993-01-12
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Expires: 2010-04-06
Abstract
Abstract PCT No. PCT/JP90/00464 Sec. 371 Date Jan. 31, 1991 Sec. 102(e) Date Jan. 31, 1991 PCT Filed Apr. 6, 1990 PCT Pub. No. WO90/11898 PCT Pub. Date Oct. 18, 1990.A composition for reversible thermal recording media which contains an amphoteric compound having at least one of a phenolic hydroxyl group and a carboxyl group and also having an amino group either as a functional group or as part of a salt compound, and a leuco compound.
Inventors
- 👤 Niro Watanabe
- 👤 Toyoko Shimizu
- 👤 Yoshihiro Hino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:58
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/333; B41M5/3333; B41M5/3335; B41M5/305
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
49 words
A composition for reversible thermal recording media which contains an amphoteric compound having at least one of a phenolic hydroxyl group and a phenolic carboxyl group and also having an NH 2 group either as a functional group or as part of a salt compound, and a leuco compound.
Claim 2
Dependent Claim
49 words
A composition for reversible thermal recording media which contains an amphoteric compound having at least one of a phenolic hydroxyl group and a phenolic carboxyl group and also having an NH 2 group either as a functional group or as part of a salt compound, and a leuco compound.
Claim 3
Dependent Claim
64 words
A composition for reversible thermal recording media according to claim 1 wherein said amphoteric compound has at least one of a phenolic hydroxyl group and a carboxyl group, and an NH 2 group, which compound is represented by the following general formula (1): ##STR47## where X is a hydroxyl group or a carboxyl group; and R is a hydrogen atom or a hydroxyl group.
Claim 4
Dependent Claim
42 words
A composition for reversible thermal recording media according to claim 2 wherein said amphoteric compound is an aminophenol or an aminobenzoic acid which are represented by the following general formula (2): ##STR48## where X is a hydroxyl group or a carboxyl group.
Claim 5
Dependent Claim
27 words
A composition for reversible thermal recording media according to claim 2 wherein said amphoteric compound is a hydroxy-aminobenzoic acid represented by the following general formula (3): ##STR49##
Claim 6
Dependent Claim
42 words
A composition for reversible thermal recording media according to claim 1 wherein said amphoteric compound is a salt or a complex salt of a compound having at least one phenolic hydroxyl group and/or a phenolic carboxyl group with an aliphatic primary amine.
Claim 7
Dependent Claim
75 words
A composition for reversible thermal recording media according to claim 5 wherein said compound having at least one phenolic hydroxyl group and/or a carboxyl group is one member selected from among compounds represented by the following general formula (A) or (B) and ester compounds of these compounds: ##STR50## where n is an integer of 1-3; ##STR51## where R 1 is a hydrogen atom or a methyl group, and n 1 is an integer of 0-6.
Claim 8
Dependent Claim
73 words
A composition for reversible thermal recording media according to claim 5 wherein said aliphatic amine is one member selected from among compounds represented by the following general formula (C) or (D): R.sub.2 NH.sub.2 [C] where R 2 is an alkyl group having at least 8 carbon atoms; ##STR52## where R 3 is a hydrogen atom, an alkyl group, a halogen atom or an alkoxy group; and n 2 is an integer of 1-18.
Claim 9
Dependent Claim
54 words
A composition for reversible thermal recording media according to claim 5 wherein said amphoteric compound is a salt of di-hydroxybenzoic acid and a higher aliphatic amine having at least 8 carbon atoms, as represented by the following general formula (4): ##STR53## where R 4 is an alkyl group having at least 8 carbon atoms.
Claim 10
Dependent Claim
48 words
A composition for reversible thermal recording media according to claim 5 wherein said amphoteric compound is a salt of gallic acid and a higher aliphatic amine, as represented by the following general formula (5): ##STR54## where R 5 is an alkyl group having at least 8 carbon atoms.
Claim 11
Dependent Claim
68 words
A composition for reversible thermal recording media according to claim 5 wherein said amphoteric compound is a salt of hydroxybenzoic acid or dihydroxybenzoic acid and an aliphatic amine, as represented by the following general formula (6): ##STR55## where R 6 is a hydrogen atom, an alkyl group, a halogen atom or an alkoxy group; n 2 is 1 or 2; and n 3 is an integer of 1-18.
Claim 12
Dependent Claim
59 words
A composition for reversible thermal recording media according to claim 5 wherein said amphoteric compound is a salt of gallic acid and an aliphatic amine, as represented by the following general formula (7): ##STR56## where R 7 is a hydrogen atom, an alkyl group, a halogen atom or an alkoxy group; and n 4 is an integer of 1-18.
Claim 13
Dependent Claim
62 words
A composition for reversible thermal recording media according to claim 5 wherein said amphoteric compound is a salt of bis(hydroxyphenyl)acetic acid or bis(hydroxyphenyl)butyric acid and a higher aliphatic amine, as represented by the following general formula (8): ##STR57## where R 8 is a hydrogen atom or a methyl group; and R 9 is an alkyl group having at least 8 carbon atoms.
Claim 14
Dependent Claim
82 words
A composition for reversible thermal recording media according to claim 5 wherein said amphoteric compound is a salt of an aliphatic carboxylic acid having two hydroxyphenyl groups and an aliphatic amine, as represented by the following general formula (9): ##STR58## where R 10 is a hydrogen atom or a methyl group; R 11 is a hydrogen atom, an alkyl group, a halogen atom or an alkoxy group; n 5 is an integer of 0-6; and n 6 is an integer of 1-18.
Claim 15
Dependent Claim
55 words
A composition for reversible thermal recording media according to claim 5 wherein said amphoteric compound is a complex salt of a gallic acid ester and a higher aliphatic amine, as represented by the following general formula (10): ##STR59## where R 12 and R 13 are each an alkyl group having at least 8 carbon atoms.
Claim 16
Dependent Claim
16 words
A composition for reversible thermal recording media according to claim 1 which further contains a binder.
References Cited (Backward Citations)
US4028118A
Cited
JPS50105555A
Cited
US4097288A
Cited
US4180405A
Cited
US4513052A
Cited
US4423116A
Cited
US4716424A
Cited
EP0097220A2
Cited
US4500354A
Cited
US4729983A
Cited
JPS62242583A
Cited
US4918047A
Cited
US4839332A
Cited
JPS6488293A
Cited
JPS6488294A
Cited
US4999333A
Cited
JPH0275181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-01-12 | 1996-07-13 | 1997-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-01-12 | 2000-07-13 | 2001-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-01-12 | 2004-07-13 | 2005-01-12 | $7700.00 | Window Closed / Lapsed |