US4469831A
Expired / Lapsed
US
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Moisture-curing, storage stable, single-component polyurethane systems
Assignee: BASF SE
•
Filing: 1983-04-28
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Granted: 1984-09-04
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Expires: 2003-04-28
Abstract
Abstract The object of this invention is a moisture-curing, storage stable, single-component polyurethane system comprising: A. a polyurethane prepolymer with a free isocyanate content of 1 to 5 percent by weight; B. a dialdimine having the formula R[--N═CH--C(CH.sub.3).sub.2 --CH.sub.2 --O--CO--CH--(CH.sub.3).sub.2 ] 2 in which R is a divalent aliphatic radical with 2 to 10 carbon atoms, aliphatic radical having 4 to 10 carbon atoms and containing ether oxygen and/or lower alkylamino nitrogen atoms, cycloaliphatic radical with 6 to 15 carbon atoms or aromatic radical with 6 to 21 carbon atoms; and C. an acid catalyst selected from the group consisting of aliphatic carboxylic acids, aromatic carboxylic acids, toluenesulfonic acid, and mixtures thereof. The polyurethane systems are used as coating, sealing, casting, spackling and bonding materials.
Inventors
- 👤 Uwe Bueltjer
- 👤 Heinrich Horacek
- 👤 Wolfgang Druschke
- 👤 Gernot Franzmann
- 👤 Erhard Klahr
- 👤 Hans-Juergen Foerster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:36
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/089; C08G18/10; C08G2190/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
105 words
Moisture-curing, storage stable, single-component polyurethane composition comprising: A. a polyurethane prepolymer having a free isocyanate content of 1 to 5 percent by weight; B. a dialdimine chain extender having the formula R[--N═CH--C(CH.sub.3).sub.2 --CH.sub.2 --O--CO--CH(CH.sub.3).sub.2 ].sub.2, in which R is a divalent aliphatic radical with 2 to 10 carbon atoms, aliphatic radical having 4 to 10 carbon atoms and containing ether oxygen and/or lower alkylamino nitrogen atoms, cycloaliphatic radical with 6 to 15 carbon atoms, or aromatic radical with 6 to 21 carbon atoms; and C. an acid catalyst selected from the group consisting of aliphatic carboxylic acids, aromatic carboxylic acids, toluenesulfonic acid, and mixtures thereof.
Claim 2
Dependent Claim
105 words
Moisture-curing, storage stable, single-component polyurethane composition comprising: A. a polyurethane prepolymer having a free isocyanate content of 1 to 5 percent by weight; B. a dialdimine chain extender having the formula R[--N═CH--C(CH.sub.3).sub.2 --CH.sub.2 --O--CO--CH(CH.sub.3).sub.2 ].sub.2, in which R is a divalent aliphatic radical with 2 to 10 carbon atoms, aliphatic radical having 4 to 10 carbon atoms and containing ether oxygen and/or lower alkylamino nitrogen atoms, cycloaliphatic radical with 6 to 15 carbon atoms, or aromatic radical with 6 to 21 carbon atoms; and C. an acid catalyst selected from the group consisting of aliphatic carboxylic acids, aromatic carboxylic acids, toluenesulfonic acid, and mixtures thereof.
Claim 3
Dependent Claim
27 words
The composition of claim 1 wherein the polyurethane prepolymer (A) is the reaction product of a polyol predominantly with an aliphatic polyisocyanate, a cycloaliphatic polyisocyanate, or both.
Claim 4
Dependent Claim
24 words
The composition of claim 2 wherein the ratio of prepolymer to dialdimine used provides 1.0 to 1.05 free isocyanate groups for each aldimine group.
Claim 5
Dependent Claim
21 words
The composition of claim 2 wherein the amount of acid used is 0.1 to 1.0 percent by weight of the product.
Claim 6
Dependent Claim
12 words
The composition of claim 2 wherein the acid catalyst is benzoic acid.
Claim 7
Dependent Claim
38 words
The composition of claim 1 or claim 2 wherein the divalent cycloaliphatic radical has the structure ##STR1## wherein X stands for a --CH 2 --, --C(CH 3 ) 2 -- --O--, --S-- or --SO 2 -- bridge member.
Claim 8
Dependent Claim
53 words
The composition of claim 1 or claim 2 wherein the divalent aromatic radical has the structure ##STR2## wherein X represents a --CH 2 --, --C(CH 3 ) 2 --, --O--, --S-- or --SO 2 -- bridge member and R' stands for a linear or branched alkyl radical with 1 to 3 carbon atoms.
Claim 9
Dependent Claim
16 words
The composition comprising: A. the composition of claim 2; B. a diluent; and C. a filler.
Claim 10
Dependent Claim
11 words
The composition of claim 8 wherein the diluent is diisodecyl phthalate.
Claim 11
Dependent Claim
10 words
The composition of claim 8 wherein the filler is chalk.
References Cited (Backward Citations)
US3239480A
Cited
GB1064841A
Cited
GB1073209A
Cited
GB1125836A
Cited
US3682867A
Cited
US3523925A
Cited
US3489723A
Cited
US3493543A
Cited
US3595839A
Cited
US3753933A
Cited
US3789045A
Cited
GB1575666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |