Patent US4051088A successfully refreshed from Google Patents.
US4051088A
Expired / Lapsed
US
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Liquid thermosetting coating compositions
Assignee: Dulux Australia Ltd
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Filing: 1975-08-11
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Granted: 1977-09-27
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Expires: 1995-08-11
Abstract
Abstract A liquid thermosetting coating composition wherein the film-forming component is a blend of A. from 60-95% by weight of an acid half-ester of a carboxylic acid anhydride and a polyol, the polyol being the diester of a diepoxide of epoxide equivalent 300 maximum, an autoxidative monocarboxylic fatty acid and a monocarboxylic hydroxy-acid, the acid half-ester having no epoxide groups and on average 1.5-2.5 hydroxyl groups, 1-2 carboxyl groups and 1-2 autoxidative fatty acid residues per molecule, and B. from 5-40% of a suitable crosslinking agent. The coating compositions have low viscosities at high weight solids contents, and dried films thereof exhibit excellent mechanical properties.
Inventors
- 👤 David Vincent Gibson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:41
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4292; C09; C09D; C09D163/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
124 words
A liquid thermosetting coating composition having a weight solids content of 70% minimum characterised in that the film-forming component thereof is a blend of the following constituents; 1. from 60-95% by weight of an acid half-ester of a carboxylic acid anhydride and a polyol, the polyol being a di-ester of a diepoxide, an autoxidative monocarboxylic fatty acid and a monocarboxylic hydroxy-acid, further characterised in that the diepoxide has an epoxide equivalent of 300 maximum, the acid half-ester is epoxide-free and comprises on average 1.5-2.5 hydroxy groups, 1-2 carboxyl groups and 1-2 autoxidative residues of monocarboxyolic fatty acids per molecule; and 2. from 5-40% by weight of a crosslinking agent reactable with hydroxyl groups of the acid half-ester to form a crosslinked molecular net work.
Claim 2
Dependent Claim
124 words
A liquid thermosetting coating composition having a weight solids content of 70% minimum characterised in that the film-forming component thereof is a blend of the following constituents; 1. from 60-95% by weight of an acid half-ester of a carboxylic acid anhydride and a polyol, the polyol being a di-ester of a diepoxide, an autoxidative monocarboxylic fatty acid and a monocarboxylic hydroxy-acid, further characterised in that the diepoxide has an epoxide equivalent of 300 maximum, the acid half-ester is epoxide-free and comprises on average 1.5-2.5 hydroxy groups, 1-2 carboxyl groups and 1-2 autoxidative residues of monocarboxyolic fatty acids per molecule; and 2. from 5-40% by weight of a crosslinking agent reactable with hydroxyl groups of the acid half-ester to form a crosslinked molecular net work.
Claim 3
Dependent Claim
32 words
A liquid thermosetting coating composition according to claim 1, characterised in that the film-forming component is a blend of from 90%-70% by weight of acid half-ester and from 10-30% of crosslinking agent.
Claim 4
Dependent Claim
35 words
A liquid thermosetting coating composition according to claim 1, characterised in that the crosslinking agent is a methylol melamine containing 4-6 methylol groups per molecule, the methylol groups being fully etherified with methanol or ethanol.
Claim 5
Dependent Claim
24 words
A liquid thermosetting coating composition according to claim 1, characterised in that the crosslinking agent is a condensation product of a phenol and formaldehyde.
Claim 6
Dependent Claim
23 words
A liquid thermosetting coating composition according to claim 1, characterised in that the diepoxide is a condensation product of epichlorhydrin and 2,2-diphenylol propane.
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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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |