US4420538A
Expired / Lapsed
US
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Heat-sensitive recording materials
Assignee: Kanzaki Paper Manufacturing Co Ltd
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Filing: 1981-12-31
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Granted: 1983-12-13
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Expires: 2001-12-31
Abstract
Abstract A heat-sensitive recording material is described comprising a support having a recording layer provided thereon, said recording layer containing (1) at least one colorless or pale-colored basic dye, (2) hydroquinone monobenzyl ether, and (3) at least one compound selected from compounds represented by the formulae (I) to (IV): ##STR1## wherein X and Y are each a chlorine atom, an alkyl group having 1 to 7 carbon atoms, a phenyl group or a benzyl group; m and n are each an integer of 0 to 3; and R 1 and R 2 are each a hydrogen atom, an alkyl group having 1 to 7 carbon atoms, a phenyl group or a benzyl group, or R 1 and R 2 may jointly form a cyclohexane ring. The heat-sensitive recording material is suitable for use in high-speed recording, e.g., high-speed facsimiles.
Inventors
- 👤 Teruo Nakamura
- 👤 Naoto Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:34
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/333; B41M5/3333; B41M5/3335; B41M5/3336; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
122 words
A heat-sensitive recording material comprising a support having a recording layer provided thereon, said recording layer containing (1) at least one colorless or pale-colored basic dye, (2) hydroquinone monobenzyl ether, and (3) at least one compound selected from compounds represented by the formulae (I) to (IV); ##STR3## wherein X and Y are each a chlorine atom, an alkyl group having 1 to 7 carbon atoms, a phenyl group or a benzyl group; m and n are each an integer of 0 to 3; and R 1 and R 2 are each a hydrogen atom, an alkyl group having 1 to 7 carbon atoms, a phenyl group or a benzyl group, or R 1 and R 2 may jointly form a cyclohexane ring.
Claim 2
Dependent Claim
122 words
A heat-sensitive recording material comprising a support having a recording layer provided thereon, said recording layer containing (1) at least one colorless or pale-colored basic dye, (2) hydroquinone monobenzyl ether, and (3) at least one compound selected from compounds represented by the formulae (I) to (IV); ##STR3## wherein X and Y are each a chlorine atom, an alkyl group having 1 to 7 carbon atoms, a phenyl group or a benzyl group; m and n are each an integer of 0 to 3; and R 1 and R 2 are each a hydrogen atom, an alkyl group having 1 to 7 carbon atoms, a phenyl group or a benzyl group, or R 1 and R 2 may jointly form a cyclohexane ring.
Claim 3
Dependent Claim
30 words
A heat-sensitive recording material as in claim 1, wherein X and Y are each an alkyl group having 1 to 7 carbon atoms, a phenyl group or a benzyl group.
Claim 4
Dependent Claim
35 words
A heat-sensitive recording material as in claim 1 or 2, wherein the amount of hydroquinone monobenzyl ether used is from 100 to 700 parts by weight per 100 parts by weight of the basic dye.
Claim 5
Dependent Claim
39 words
A heat-sensitive recording material as in claim 1 or 2, wherein the amount of compound represented by the formulae (I) to (IV) is from 1 to 200 parts by weight per 100 parts by weight of hydroquinone monobenzyl ether.
Claim 6
Dependent Claim
35 words
A heat-sensitive recording material as in claim 1 or 2, wherein the amount of hydroquinone monobenzyl ether used is from 150 to 400 parts by weight per 100 parts by weight of the basic dye.
Claim 7
Dependent Claim
39 words
A heat-sensitive recording material as in claim 1 or 2, wherein the amount of compound represented by the formulae (I) to (IV) is from 10 to 150 parts by weight per 100 parts by weight of hydroquinone monobenzyl ether.
Claim 8
Dependent Claim
64 words
A heat-sensitive recording material as in claim 1 or 2, wherein the amount of hydroquinone monobenzyl ether used is from 100 to 700 parts by weight per 100 parts by weight of the basic dye, and the amount of compound represented by the formulae (I) to (IV) is from 1 to 200 parts by weight per 100 parts by weight of hydroquinone monobenzyl ether.
Claim 9
Dependent Claim
64 words
A heat-sensitive recording material as in claim 1 or 2, wherein the amount of hydroquinone monobenzyl ether used is from 150 to 400 parts by weight per 100 parts by weight of the basic dye, and the amount of compound represented by the formulae (I) to (IV) is from 10 to 150 parts by weight per 100 parts by weight of hydroquinone monobenzyl ether.
Claim 10
Dependent Claim
33 words
The heat-sensitive recording material of claim 1 wherein said at least one compound is selected from the group consisting of 2,2-Bis(4'-hydroxyphenyl)propane, Bis (2-methyl-4-hydroxy-5-tertbutylphenyl)sulfide, Bis(2-hydroxy-3-tert-butyl-5-methylphenyl)methane, 1,1-bis(4'-hydroxyphenyl)cyclohexane, 1,1-Bis(4'-hydroxyphenyl)ethane, 2,2-bis(4'-hydroxyphenyl)butane, 2,2-bis(4'-hydroxyphenyl)octane, (3'-methyl-4',4"-dihydroxydiphenyl)-2,2-propane, bis(2-hydroxy-5-chlorophenyl)methane, 2,6-di-tert-butyl-4-(α,α-di-methylbenzyl)phenol and bis(4-hydroxyphenyl)sulfone.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-12 | 1987-06-13 | 1987-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-12 | 1991-06-13 | 1991-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-12 | 1995-06-13 | 1995-12-13 | $7700.00 | Window Closed / Lapsed |