US4729983A
Expired / Lapsed
US
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Heat-sensitive recording material
Assignee: Nippon Paper Industries Co Ltd
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Filing: 1986-06-09
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Granted: 1988-03-08
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Expires: 2006-06-09
Abstract
Abstract A heat-sensitive recording material comprises a support and a color-developing layer having both a particular saturated higher fatty acid iron salt and a particular polyvalent phenolic derivative. The heat-sensitive recording material provides a superior thermal response and a high stabilty of the developed image.
Inventors
- 👤 Toshimi Satake
- 👤 Tomoaki Nagai
- 👤 Fumio Fujimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:18
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/32; B41M5/333; B41M5/3333; B41M5/3335; B41M5/3336
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
89 words
A heat-sensitive recording material comprising a support and having thereon a color-developing layer, wherein said color-developing layer comprises both a saturated higher fatty acid iron salt having 16-35 carbon atoms and a polyvalent phenolic derivative represented by the following general formula (I): ##STR18## where R represents an alkyl group having 18-35 carbon atoms, n represents an integer from 2 to 3, and --X-- represents --CH 2 --, --O--, --CONH--, ##STR19## (R' is an alkyl group having 5-10 carbon atoms), --SO 2 --, --SO 3 --, or --SO 2 NH--.
Claim 2
Dependent Claim
89 words
A heat-sensitive recording material comprising a support and having thereon a color-developing layer, wherein said color-developing layer comprises both a saturated higher fatty acid iron salt having 16-35 carbon atoms and a polyvalent phenolic derivative represented by the following general formula (I): ##STR18## where R represents an alkyl group having 18-35 carbon atoms, n represents an integer from 2 to 3, and --X-- represents --CH 2 --, --O--, --CONH--, ##STR19## (R' is an alkyl group having 5-10 carbon atoms), --SO 2 --, --SO 3 --, or --SO 2 NH--.
Claim 3
Dependent Claim
19 words
The heat-sensitive recording material according to claim 1, wherein said saturated higher fatty acid iron salt is iron behenate.
Claim 4
Dependent Claim
24 words
The heat-sensitive recording material aocording to claim 1, wherein said polyvalent phenolic derivative is a compound represented by the following general formula (II): ##STR20##
Claim 5
Dependent Claim
19 words
The heat-sensitive recording material according to claim 1, wherein said saturated higher fatty acid iron salt is iron stearate.
Claim 6
Dependent Claim
51 words
The heat-sensitive recording material according to claim 1, wherein said color-developing layer comprises 1-6 parts by weight of polyvalent phenolic derivative and 2-15 parts by weight of filler, based on 1-6 parts by weight of saturated-higher fatty acid iron salt, and 0.5-4 parts by weight of binder in total solid content.
Claim 7
Dependent Claim
16 words
The heat-sensitive recording material according to claim 1, wherein said color-developing layer lies on the support.
Claim 8
Dependent Claim
27 words
The heat-sensitive recording material according to claim 6, wherein said support is at least one member selected from a group consisting of paper, synthetic paper and film.
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) | 1991-03-08 | 1991-09-07 | 1992-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-08 | 1995-09-07 | 1996-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-08 | 1999-09-07 | 2000-03-08 | $7700.00 | Window Closed / Lapsed |