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US4771033A
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Heat-sensitive record material
Assignee: New Oji Paper Co Ltd
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Filing: 1987-07-06
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Granted: 1988-09-13
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Expires: 2007-07-06
Abstract
Abstract A heat-sensitive record material having on a base sheet a recording layer which comprises a basic colorless chromogenic material and an acceptor in the state of that the colorless chromogenic material is contacted with the acceptor by heating to produce color images. The recording layer comprises at least one phenol compound represented by the following formula (I) together with the colorless chromogenic material and the acceptor, <IMAGE> (I) wherein each of R1, R2 and R3 radicals is hydrogen, C1-8 alkyl or C5-8 cycloalkyl, but at least one of R1, R2 and R3 radicals is C5-8 cycloalkyl; and each of R4, R5, R6, R7 and R8 radicals is hydrogen or C1-8 alkyl.
Inventors
- 👤 Yoshihiro Shimizu
- 👤 Naoto Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:25
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: 12
Claim 1
Independent Claim
125 words
A heat-sensitive record material having on a base sheet a recording layer which comprises a basic colorless chromogenic material and an acceptor in the state of that the colorless chromogenic material is contacted with the acceptor by heating to produce color images, characterized in that said recording layer further comprises at least one phenol compound represented by the following formula (I), ##STR9## wherein each of R 1 , R 2 and R 3 radicals is hydrogen, C 1-8 alkyl or C 5-8 cycloalkyl, but at least one of R 1 , R 2 and R 3 radicals is C 5-8 cycloalkyl; and each of R 4 , R 5 , R 6 , R 7 and R 8 radicals is hydrogen or C 1-8 alkyl.
Claim 2
Dependent Claim
125 words
A heat-sensitive record material having on a base sheet a recording layer which comprises a basic colorless chromogenic material and an acceptor in the state of that the colorless chromogenic material is contacted with the acceptor by heating to produce color images, characterized in that said recording layer further comprises at least one phenol compound represented by the following formula (I), ##STR9## wherein each of R 1 , R 2 and R 3 radicals is hydrogen, C 1-8 alkyl or C 5-8 cycloalkyl, but at least one of R 1 , R 2 and R 3 radicals is C 5-8 cycloalkyl; and each of R 4 , R 5 , R 6 , R 7 and R 8 radicals is hydrogen or C 1-8 alkyl.
Claim 3
Dependent Claim
30 words
A heat-sensitive record material as defined in claim 1, wherein said phenol compound is at least one selected from the group consisting of 1,1,3-tris(2-methyl-4-hydroxy-5-cyclohexylphenyl)butane, 1,1,3-tris(2-ethyl-4-hydroxy-5-cyclohexylphenyl)butane, 1,1,3-tris(2-methyl-4-hydroxy-5-cyclohexylphenyl)propane, 1,1,3-tris(2-methyl-4-hydroxy-5-cyclopentylphenyl)butane, 1,1,3-tris(2-ethyl-4-hydroxy-5-cyclopentylphenyl)butane, and 1,1,3-tris(2-methyl-4-hydroxy-5-cyclopentylphenyl)propane.
Claim 4
Dependent Claim
17 words
A heat-sensitive record material as defined in claim 1, wherein benzyl 4-hydroxybenzoate is used as said acceptor.
Claim 5
Dependent Claim
76 words
A heat-sensitive record material as defined in claim 1, wherein said acceptor comprises at least one 4-hydroxydiphenylsulfone derivative represented by the following formula (II), ##STR10## wherein each of R 9 , R 10 , R 11 , R 12 and R 13 radicals is hydrogen, halogen, C 1-10 saturated or unsaturated alkyl, C 1-10 alkoxyl, benzyloxy, aryloxy or hydroxy; and R 9 and R 10 or R 10 and R 11 may form trimethylene or tetramethylene.
Claim 6
Dependent Claim
70 words
A heat-sensitive record material as defined in claim 4, wherein said 4-hydroxydiphenylsulfone derivative is represented by the following formula (II'), ##STR11## wherein each of R 14 , R 15 , R 16 , R 17 and R 18 radicals is hydrogen, halogen, C 1-4 saturated or unsaturated alkyl, C 1-4 alkoxyl or hydroxy; and R 14 and R 15 or R 15 and R 16 may form trimethylene or tetramethylene.
Claim 7
Dependent Claim
50 words
A heat-sensitive record material as defined in claim 1, wherein said acceptor comprises at least one 4-hydroxybenzenesulfonylnapthalene derivative represented by the following formula (III) or (IV), ##STR12## wherein each of R 19 to R 28 radicals is hydrogen, halogen, C 1-10 saturated alkyl, C 1-10 alkoxyl, benzyloxy, aryloxy or hydroxy.
Claim 8
Dependent Claim
43 words
A heat-sensitive record material as defined in claim 6, wherein said 4-hydroxybenzenesulfonylnapthalene derivative is represented by the following formula (III') or (IV'), ##STR13## wherein each of R 29 to R 38 radicals is hydrogen, halogen, C 1-4 saturated alkyl or C 1-4 alkoxyl.
Claim 9
Dependent Claim
80 words
A heat-sensitive record material as defined in claim 1, wherein said acceptor comprises at least one selected from the polyvalent metal salts of halophthalic acid monoester derivative represented by the following formula (V), ##STR14## wherein R 39 radical is substituted or unsubstituted C 1-18 saturated alkyl, substituted or unsubstituted C 5-6 cycloalkyl, substituted or unsubstituted C 3-9 unsaturated alkyl, substituted or unsubstituted aryl, or substituted or unsubstituted aralkyl; X is halogen; and n is an integer of 1 to 4.
Claim 10
Dependent Claim
68 words
A heat-sensitive record material as defined in claim 8, wherein said halophthalic acid monoester derivative is represented by the following formula (V'), ##STR15## wherein R 40 radical is C 1-4 saturated alkyl which may be substituted by hydroxy, C 1-4 unsaturated alkyl which may be substituted by hydroxy or cyclohexyl which may be substituted by hydroxy; X is halogen; and n is an integer of 1 to 4.
Claim 11
Dependent Claim
24 words
A heat-sensitive record material as defined in claim 8, wherein said polyvalent metal is magnesium, calcium, barium, zinc, aluminum, tin, iron, cobalt or nickel.
Claim 12
Dependent Claim
19 words
A heat-sensitive record material as defined in claim 1, wherein a protective layer is formed on said recording layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |