US4720535A
Expired / Lapsed
US
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Moisture tempered, storage stable single component polyurethane systems and their application
Assignee: BASF SE
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Filing: 1987-03-02
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Granted: 1988-01-19
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Expires: 2007-03-02
Abstract
Abstract This invention relates to moisture tempered, storage stable, single component polyurethane systems prepared from a polyurethane prepolymer derived from an aromatic polyisocyanate, and a polyaldimine, which are used for preparing polyurethane elastomers or polyurethane coatings having improved temperature resistance.
Inventors
- 👤 Gisbert Schleier
- 👤 Friedrich Gerold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:08
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/08; C08G18/10; C08G18/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
173 words
A moisture tempered, storage stable single component polyurethane system comprising (A) a polyurethane prepolymer having an NCO content of from 1 to 10 percent by weight, prepared by the reaction of a higher molecular weight polyol and an aromatic polyisocyanate; (B) a polyaldimine having the formula R(N═CH--C(CH.sub.3).sub.2 --CH.sub.2 --R.sup.1).sub.n, wherein: R is an arylene radical having the structure ##STR6## x is a --CH 2 --, --C(CH 3 ) 2 --, --O--, --SO--, --SO 2 -- OR --CO-- bridge member; R 2 is a linear or branched alkyl radical having from 1 to 4 carbon atoms; m is a whole number from 1 to 4; R 1 is a hydrogen atom, an alkyl group having from 1 to 10 carbon atoms, an alkoxy group having from 1 to 20 carbon atoms, or an alkoyloxy group having from 1 to 20 carbon atoms; and n is a whole number from 2 to 6; and optionally including (C) an aromatic and/or aliphatic carboxylic acid or toluenesulfonic acid; and optionally further including; (D) auxiliary agents and/or additives.
Claim 2
Dependent Claim
173 words
A moisture tempered, storage stable single component polyurethane system comprising (A) a polyurethane prepolymer having an NCO content of from 1 to 10 percent by weight, prepared by the reaction of a higher molecular weight polyol and an aromatic polyisocyanate; (B) a polyaldimine having the formula R(N═CH--C(CH.sub.3).sub.2 --CH.sub.2 --R.sup.1).sub.n, wherein: R is an arylene radical having the structure ##STR6## x is a --CH 2 --, --C(CH 3 ) 2 --, --O--, --SO--, --SO 2 -- OR --CO-- bridge member; R 2 is a linear or branched alkyl radical having from 1 to 4 carbon atoms; m is a whole number from 1 to 4; R 1 is a hydrogen atom, an alkyl group having from 1 to 10 carbon atoms, an alkoxy group having from 1 to 20 carbon atoms, or an alkoyloxy group having from 1 to 20 carbon atoms; and n is a whole number from 2 to 6; and optionally including (C) an aromatic and/or aliphatic carboxylic acid or toluenesulfonic acid; and optionally further including; (D) auxiliary agents and/or additives.
Claim 3
Dependent Claim
39 words
A moisture tempered, storage stable single component polyurethane system according to claim 1 wherein the polyurethane prepolymers are prepared by reaction of di- and/or trifunctional polyester and/or polyether-polyols having molecular weights from 1000 to 8000 and an aromatic polyisocyanate.
Claim 4
Dependent Claim
66 words
A moisture tempered, storage stable single component polyurethane system according to claim 2 wherein 4,4'-diphenylmethane diisocyanate or a mixture of at least 50 percent by weight 4,4'-diphenylmethane diisocyanate, from 0 to 50 percent by weight 2,4'-diphenylmethane diisocyanate and/or from 0 to 30 percent by weight polyphenyl-polymethylene polyisocyanate are used as the aromatic polyisocyanate, so that the total of the components results in 100 percent by weight.
Claim 5
Dependent Claim
32 words
A moisture tempered, storage stable single component polyurethane system according to claim 1 containing from 0.4 to 1.3 equivalents of --N═CH groups of polyaldimines (B) per NCO groups of polyurethane prepolymers (A).
Claim 6
Dependent Claim
29 words
A moisture tempered, storage stable single component polyurethane system according to claim 1 containing from 0 to 100 equivalents of a carboxylic acid or toluenesulfonic acid per polyaldimine (B).
Claim 7
Dependent Claim
34 words
A moisture tempered, storage stable single component polyurethane system according to claim 1 containing from 0.2 to 10 percent by weight malonic acid diethyl ester, based on the weight of the polyurethane prepolymer (A).
Claim 8
Dependent Claim
16 words
A polyurethane elastomer or coating prepared from a single component polyurethane system according to claim 1.
References Cited (Backward Citations)
CA1205249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-18 | 1991-07-20 | 1992-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-18 | 1995-07-20 | 1996-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-18 | 1999-07-20 | 2000-01-19 | $7700.00 | Window Closed / Lapsed |