Patent US4937224A successfully refreshed from Google Patents.
US4937224A
Expired / Lapsed
US
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Thermal transfer record sheet
Assignee: Teijin Ltd
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Filing: 1989-09-25
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Granted: 1990-06-26
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Expires: 2009-09-25
Abstract
Abstract A thermal transfer record sheet comprising a substrate sheet and a dye receptive layer and a non-tacky layer in this order on at least one surface of the substrate sheet; the dye receptive layer being composed of a crosslinking reaction product of a composition comprising (A-1) a saturated polyester containing units derived from 2,2-bis(4-hydroxyphenyl)propane in the main chain of the polyester and having a glass transition temperature of at least 60° C. and (A-2) a polyisocyanate compound, and the non-tacky layer (B-1) comprising a water-insoluble or sparingly water-soluble fluorine-containing surface-active agent and (B-2) having a thickness of 50 to 200 angstrom.
Inventors
- 👤 Takashi Yamagishi
- 👤 Yukito Yamamoto
- 👤 Yoji Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:20
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/50; B41M5/52; B41M5/5263; B41M5/5272; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10T; Y10T428/00; Y10T428/26; Y10T428/261; Y10T428/31504; Y10T428/31551; Y10T428/31786; Y10T428/31794
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
98 words
A thermal transfer record sheet comprising a substrate sheet and a dye receptive layer and a non-tacky layer in this order on at least one surface of the substrate sheet; said dye receptive layer being composed of a crosslinking reaction product of a composition comprising (a) a saturated polyester containing units derived from 2,2-bis(4-hydroxyphenyl)propane in the main chain of the polyester and having a glass transition temperature of at least 60° C. and (b) a polyisocyanate compound, said non-tacky layer comprising a water-insoluble or sparingly water-soluble fluorine-containing surface-active agent and having a thickness of 50 to 200 angstrom.
Claim 2
Dependent Claim
98 words
A thermal transfer record sheet comprising a substrate sheet and a dye receptive layer and a non-tacky layer in this order on at least one surface of the substrate sheet; said dye receptive layer being composed of a crosslinking reaction product of a composition comprising (a) a saturated polyester containing units derived from 2,2-bis(4-hydroxyphenyl)propane in the main chain of the polyester and having a glass transition temperature of at least 60° C. and (b) a polyisocyanate compound, said non-tacky layer comprising a water-insoluble or sparingly water-soluble fluorine-containing surface-active agent and having a thickness of 50 to 200 angstrom.
Claim 3
Dependent Claim
23 words
The record sheet of claim 1 in which said saturated polyester contains 2.5 to 25% by weight of the units derived from 2,2-bis(4-hydroxyphenyl)propane.
Claim 4
Dependent Claim
30 words
The record sheet of claim 1 in which the fluorine-containing surface-active agent shows a solubility of only not more than 0.5 g in 100 g of water at 25° C.
Claim 5
Dependent Claim
40 words
The record sheet of claim 1 in which the composition forming the crosslinking reaction product in the dye receptive layer contains 100 parts by weight of the saturated polyester and 5 to 25 parts by weight of the polyisocyanate compound.
Claim 6
Dependent Claim
20 words
The record sheet of claim 1 in which the dye receptive layer has a thickness of 1 to 6 micrometers.
References Cited (Backward Citations)
JPH02201291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-25 | 1993-12-25 | 1994-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-25 | 1997-12-25 | 1998-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-25 | 2001-12-25 | 2002-06-26 | $7700.00 | Window Closed / Lapsed |