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US4511909A
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Heat-sensitive recording materials
Assignee: New Oji Paper Co Ltd
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Filing: 1982-10-29
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Granted: 1985-04-16
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Expires: 2002-10-29
Abstract
Abstract A heat-sensitive recording material comprising a support having a recording layer provided thereon, the recording layer comprising a colorless or pale-colored basic dye and a color developing material, wherein the recording layer further comprises at least one heat-fusible material represented by the formula (I) or (II): <IMAGE> (I) <IMAGE> (II) wherein R1 to R17 independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, a phenyl group, a benzyl group, or a benzyloxy group.
Inventors
- 👤 Naoto Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:05
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/337; B41M5/3375
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
124 words
A heat-sensitive recording material comprising a support having a recording layer provided thereon, said recording layer comprising (a) a colorless or pale-colored basic dye selected from the group consisting of 3-(N-ethyl-p-toluidino)-6-methyl-7-phenylaminofluoran, 3-(N-ethyl-p-toluidino)-6-methyl-7-(p-toluidino)fluoran, 3-diethylamino-6-methyl-7-phenylaminofluoran, 3-diethylamino-7-(2-carbomethoxyphenylamino)fluoran, 3-(N-cyclohexyl-N-methylamino)-6-methyl-7-phenylaminofluoran, 3-pyrrolidino-6-methyl-7-phenylaminofluoran, 3-piperidino-6-methyl-7-phenylaminofluoran, 3-diethylamino-6-methyl-7-xylidinofluoran, 3-pyrrolidino-6-methyl-7-p-butylphenylaminofluoran, and 3,3-bis-(p-dimethylaminophenyl)-6-dimethylaminophthalide, (b) a color developing material, and (c) at least one heat-fusible material represented by the formula (I): ##STR4## wherein R 1 to R 8 independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, a phenyl group, a benzyl group, or a benzyloxy group, and wherein the ratio by weight of said at least one heat-fusible material to said developing material is at least 1 to 10.
Claim 2
Dependent Claim
124 words
A heat-sensitive recording material comprising a support having a recording layer provided thereon, said recording layer comprising (a) a colorless or pale-colored basic dye selected from the group consisting of 3-(N-ethyl-p-toluidino)-6-methyl-7-phenylaminofluoran, 3-(N-ethyl-p-toluidino)-6-methyl-7-(p-toluidino)fluoran, 3-diethylamino-6-methyl-7-phenylaminofluoran, 3-diethylamino-7-(2-carbomethoxyphenylamino)fluoran, 3-(N-cyclohexyl-N-methylamino)-6-methyl-7-phenylaminofluoran, 3-pyrrolidino-6-methyl-7-phenylaminofluoran, 3-piperidino-6-methyl-7-phenylaminofluoran, 3-diethylamino-6-methyl-7-xylidinofluoran, 3-pyrrolidino-6-methyl-7-p-butylphenylaminofluoran, and 3,3-bis-(p-dimethylaminophenyl)-6-dimethylaminophthalide, (b) a color developing material, and (c) at least one heat-fusible material represented by the formula (I): ##STR4## wherein R 1 to R 8 independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, a phenyl group, a benzyl group, or a benzyloxy group, and wherein the ratio by weight of said at least one heat-fusible material to said developing material is at least 1 to 10.
Claim 3
Dependent Claim
58 words
A heat-sensitive recording material as claimed in claim 1, wherein said at least one heat-fusible material is represented by the formula (I'): ##STR5## wherein R 3 ' represents a hydrogen atom or a halogen atom; and R 6 ' and R 8 ' independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.
Claim 4
Dependent Claim
22 words
A heat-sensitive recording material as claimed in claim 1, wherein said heat-fusible material has a melting point of at least 80° C.
Claim 5
Dependent Claim
112 words
A heat-sensitive recording material comprising a support having a recording layer provided thereon, said recording layer comprising (a) a colorless or pale-colored basic dye other than 3-diethylamino-7-(o-chlorophenylamino)fluoran and 3-dibutylamino-7-(o-chlorophenylamino)fluoran, (b) a color developing material, and (c) at least one heat-fusible material represented by the formula (I): ##STR6## wherein R 1 to R 8 independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, a phenyl group, a benzyl group, or a benzyloxy group, and wherein the ratio by weight of said at least one heat-fusible material to said developing material is at least 1 to 10.
Claim 6
Dependent Claim
112 words
A heat-sensitive recording material comprising a support having a recording layer provided thereon, said recording layer comprising (a) a colorless or pale-colored basic dye other than 3-diethylamino-7-(o-chlorophenylamino)fluoran and 3-dibutylamino-7-(o-chlorophenylamino)fluoran, (b) a color developing material, and (c) at least one heat-fusible material represented by the formula (I): ##STR6## wherein R 1 to R 8 independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, a phenyl group, a benzyl group, or a benzyloxy group, and wherein the ratio by weight of said at least one heat-fusible material to said developing material is at least 1 to 10.
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) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |