US4935485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat hardenable coating composition based on polyurethane urea and coated substrate prepared therefrom
Assignee: Bayer AG
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Filing: 1989-01-03
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Granted: 1990-06-19
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Expires: 2009-01-03
Abstract
Abstract The present invention is directed to a heat hardenable coating composition containing (A) a prepolymer containing an average of 2-4 ketoxime-blocked isocyanate groups, having an average molecular weight of about 500 to 15,000 and based on an aromatic polyisocyanate and a polyhydroxyl component which contains about 20-100% by weight of ethylene oxide units and (B) a cross-linking agent corresponding to the following formula ##STR1## in which R and R 1 denote H or C 1 -C 4 -alkyl, the equivalent ratio of blocked isocyanate groups in (A) to NH 2 groups in (B) being about 1.35:1 to 0.95:1. The invention is also directed to the coated substrates obtained from the compositions according to the invention.
Inventors
- 👤 Josef Pedain
- 👤 Wilhelm Thoma
- 👤 Walter Schroer
- 👤 Waldemar Kling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:09
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/12; D06N3/14; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/12; C08G18/28; C08G18/40; C08G18/48; C08G18/4833
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
118 words
A heat hardenable coating composition, which cures to form a coating having a permeability to water vapor of about 2 to 8 g/cm 2 h according to IUP 15, comprising (A) a prepolymer containing an average of 2-4 ketoxime-blocked isocyanate groups, having an average molecular weight of about 500 to 15,000 and based on an aromatic polyisocyanate and a polyhydroxyl component containing about 20 to 100% by weight of ethylene oxide and (B) a cross-linking agent corresponding to the formula ##STR3## wherein R and R 1 represent H or a C 1 -C 4 -alkyl group and wherein the equivalent ratio of blocked isocyanate groups in (A) to NH 2 groups in (B) is about 1.35:1 to 0.95:1.
Claim 2
Dependent Claim
118 words
A heat hardenable coating composition, which cures to form a coating having a permeability to water vapor of about 2 to 8 g/cm 2 h according to IUP 15, comprising (A) a prepolymer containing an average of 2-4 ketoxime-blocked isocyanate groups, having an average molecular weight of about 500 to 15,000 and based on an aromatic polyisocyanate and a polyhydroxyl component containing about 20 to 100% by weight of ethylene oxide and (B) a cross-linking agent corresponding to the formula ##STR3## wherein R and R 1 represent H or a C 1 -C 4 -alkyl group and wherein the equivalent ratio of blocked isocyanate groups in (A) to NH 2 groups in (B) is about 1.35:1 to 0.95:1.
Claim 3
Dependent Claim
11 words
The composition of claim 1 wherein said cross-linking agent comprises diamino-3,3'-dimethyldicyclo-hexylmethane.
Claim 4
Dependent Claim
19 words
The composition of claim 1 wherein said polyhydroxyl component contains about 40 to 80% by weight of ethylene oxide.
Claim 5
Dependent Claim
19 words
The composition of claim 2 wherein said polyhydroxyl component contains about 40 to 80% by weight of ethylene oxide.
Claim 6
Dependent Claim
19 words
The composition of claim 1 wherein said composition has a solids content of about 35 to 100% by weight.
Claim 7
Dependent Claim
20 words
The composition of claim 1 wherein said polyhydroxyl component comprises a mixture of a polyhydroxy polyether and a polyhydroxy polyester.
Claim 8
Dependent Claim
19 words
The composition of claim 6 wherein said mixture has a polyether content of about 30 to 99% by weight.
Claim 9
Dependent Claim
16 words
The composition of claim 1 wherein said composition additionally comprises an aliphatic and/or aromatic polyurethane solution.
Claim 10
Dependent Claim
13 words
A coated substrate which has been coated with the composition of Example 1.
Claim 11
Dependent Claim
13 words
A coated substrate which has been coated with the composition of Example 1.
Claim 12
Dependent Claim
12 words
The coated substrate of claim 9 wherein said substrate is a textile.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |