US4026850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thixotropic urethane alkyd resins
Assignee: Bayer AG
•
Filing: 1975-08-18
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Granted: 1977-05-31
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Expires: 1995-08-18
Abstract
Abstract Thixotropic urethane alkyd resins which dry under oxidizing conditions, obtainable by reacting mixtures of: A. OH-containing partial esters of polyhydric alcohols and long chain unsaturated fatty acids and/or OH-containing oligoesters of polyhydric alcohols, long chain unsaturated fatty acids and polybasic carboxylic acids; B. OH-containing fatty acid modified dimeric fatty acid polyester amides; with C. diisocyanates.
Inventors
- 👤 Walter Frank
- 👤 Karl Raichle
- 👤 Eberhard Kreiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:02
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/60; C08G18/606; C08G18/4009; C08G18/4054
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
116 words
A thixotropic urethane alkyd resin which dries under oxidizing conditions and is obtainable by reacting a mixture of: (a) at least one member selected from the group consisting of OH-containing partial esters of polyhydric alcohols and long chain unsaturated fatty acids and OH-containing oligoesters of polyhydric alcohols, long chain unsaturated fatty acids and polycarboxylic acids and (b) an OH-containing fatty acid modified dimeric fatty acid polyester amide containing from 0.1 to 1.5 mol of ester groups and from 0.2 to 0.9 mol of hydroxyl groups per mol of carbonamide groups with a diisocyanate in such amounts that the number of OH groups in the reaction is equal to or greater than the number of isocyanate groups.
Claim 2
Dependent Claim
116 words
A thixotropic urethane alkyd resin which dries under oxidizing conditions and is obtainable by reacting a mixture of: (a) at least one member selected from the group consisting of OH-containing partial esters of polyhydric alcohols and long chain unsaturated fatty acids and OH-containing oligoesters of polyhydric alcohols, long chain unsaturated fatty acids and polycarboxylic acids and (b) an OH-containing fatty acid modified dimeric fatty acid polyester amide containing from 0.1 to 1.5 mol of ester groups and from 0.2 to 0.9 mol of hydroxyl groups per mol of carbonamide groups with a diisocyanate in such amounts that the number of OH groups in the reaction is equal to or greater than the number of isocyanate groups.
Claim 3
Dependent Claim
25 words
The thixotropic urethane alkyd resin of claim 1 wherein said mixture comprises 99-40 parts by weight of (a) and 1-60 parts by weight of (b).
Claim 4
Dependent Claim
54 words
The thixotropic urethane alkyd resin of claim 1 wherein (b) is obtained by heating a mixture of dimeric fatty acid polyamide with at least one member selected from the group consisting of fatty acid partial esters and mixtures of fatty acid esters and polyhydric alcohols to a temperature of from 190° to 230° C.
Claim 5
Dependent Claim
38 words
The thixotropic urethane alkyd resin of claim 1 wherein (b) is obtained by heating a mixture of a dimeric fatty acid polyamide, a fatty acid and a polyhydric alcohol to a temperature of from 150° to 210° C.
References Cited (Backward Citations)
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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) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |