US4942212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane resin and heat-sensitive recording medium
Assignee: Dainichiseika Color and Chemicals Mfg Co Ltd
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Filing: 1988-12-06
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Granted: 1990-07-17
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Expires: 2008-12-06
Abstract
Abstract A polyurethane resin is composed of a polyol component, a polyisocyanate component and optionally, a chain extender component. At least a portion of the polyol component or chain extender component is a siloxane polyol component represented by the following formula (1) and/or formula (2): ##STR1## wherein R means an alkyl group, R' denotes a hydrogen atom or C 1-5 alkyl group, k, l and m stand for 1-250, 0-5 and 0-50 respectively, and n is an integer of 1-3 in the formula (1) and an integer of 2-3 in the formula (2). A thermal recording material containing the polyurethane resin as a heat-resistant layer is also disclosed.
Inventors
- 👤 Kazuyuki Hanada
- 👤 Kohichi Kuroda
- 👤 Iwao Misaizu
- 👤 Masashi Kashimura
- 👤 Tomoko Goto
- 👤 Katsumi Kuriyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:56
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/42; B41M5/44; B41M5/443; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/61; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
106 words
A polyurethane resin derived from a polyol component and a polyisocyanate component, wherein at least a portion of the polyol component is a siloxane polyol component having the formula (1) or (2) or both: ##STR11## wherein R is an alkyl group, R' is hydrogen or a C 1 -C 5 alkyl group, k, l and m are integers of 1-250, 0-5 and 0-15, respectively, and n is an integer of 1-3 in formula (1) and an integer of 2-3 in formula (2), said siloxane polyol component being present in an amount sufficient to provide said polyurethane resin with tack-free and anti-blocking properties, while retaining resin flexibility.
Claim 2
Dependent Claim
106 words
A polyurethane resin derived from a polyol component and a polyisocyanate component, wherein at least a portion of the polyol component is a siloxane polyol component having the formula (1) or (2) or both: ##STR11## wherein R is an alkyl group, R' is hydrogen or a C 1 -C 5 alkyl group, k, l and m are integers of 1-250, 0-5 and 0-15, respectively, and n is an integer of 1-3 in formula (1) and an integer of 2-3 in formula (2), said siloxane polyol component being present in an amount sufficient to provide said polyurethane resin with tack-free and anti-blocking properties, while retaining resin flexibility.
Claim 3
Dependent Claim
14 words
The polyurethane resin as claimed in claim 1, further comprising a chain extender component.
Claim 4
Dependent Claim
79 words
The polyurethane resin as claimed in claim 2, wherein at least a portion of the chain extender is a siloxane polyol component represented by the following formula (1) and/or formula (2): ##STR12## wherein R means an alkyl group, R' denotes a hydrogen atom or C 1-5 alkyl group, k, l and m stand for 1-250, 0-5 and 0-50 respectively, and n is an integer of 1-3 in the formula (1) and an integer of 2-3 in the formula (2).
Claim 5
Dependent Claim
38 words
The polyurethane resin as claimed in claim 1, wherein said polyol component further contains, in combination with said siloxane compounds, a polyol containing hydroxyl groups as terminal groups and having a molecular weight in the range of 300-4000.
Claim 6
Dependent Claim
59 words
The polyurethane resin as claimed in claim 4, wherein said polyol is selected from the group consisting of polyethylene adipate, polyethylene propylene adipate, polyethylene butylene adipate, polydiethylene adipate, polybutylene adipate, polyethylene succinate, polybutylene succinate, polyethylene sebacate, polybutylene sebacate, polytetramethylene ether glycol, poly-ε-caprolactonediol, polyhexamethylene adipate, and polypropylene glycol, and any of the above also containing a proportion of polyoxyethylene chains.
Claim 7
Dependent Claim
41 words
The polyurethane resin as claimed in claim 1, wherein said polyisocyanate component is selected from the group consisting of 4,4,'-diphenylmethane diisocyanate, hydrogenated 4,4'-diphenylmethane diisocyanate, isophorone diisocyanate, 1,3-xylylene diisocyanate, 1,4-xylylene diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 1,5-naphthalene diisocyanate, m-phenylene diisocyanate and p-phenylene diisocyanate.
Claim 8
Dependent Claim
38 words
The polyurethane resin as claimed in claim 3, wherein said chain extender is selected from the group consisting of ethylene glycol, propylene glycol, diethylene glycol, 1,4-butanediol, 1,6-hexanediol, ethylenediamine, 1,2-propylenediamine, trimethylenediamine, tetramethylenediamine, hexamethylenediamine, decamethylenediamine, isophoronediamine, m-xylylene-diamine, hydrazine and water.
Claim 9
Dependent Claim
22 words
The polyurethane resin as claimed in claim 1, wherein said siloxane compound is used in an amount of about 1.0-50 wt. %.
Claim 10
Dependent Claim
15 words
The polyurethane resin as claimed in claim 1, having a molecular weight of from 20,000-500,000.
Claim 11
Dependent Claim
15 words
The polyurethane resin as claimed in claim 9, having a molecular weight of from 20,000-250,000.
References Cited (Backward Citations)
US4728690A
Cited
US4766194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-16 | 1994-01-15 | 1994-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-16 | 1998-01-15 | 1998-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-16 | 2002-01-15 | 2002-07-17 | $7700.00 | Window Closed / Lapsed |