Patent US4772680A successfully refreshed from Google Patents.
US4772680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid coating composition and a process for coating a substrate with such coating composition
Assignee: Akzo NV
•
Filing: 1986-03-26
•
Granted: 1988-09-20
•
Expires: 2006-03-26
Abstract
Abstract The invention provides a liquid coating composition curable at ambient temperature comprising an acetoacetate groups-containing addition polymer having a number average molecular weight of 1000-100,000, a glass transition temperature of 250°-370° K., a hydroxyl number of 0-200 and a content of acetoacetate groups of 3,5-45% by weight, the acetoacetate groups being present as ester of hydroxyalkyl acrylate, hydroxyalkyl methacrylate or allyl alcohol structural units, and a polyamine having primary and/or secondary amino groups and blocked with an aldehyde or ketone. A process for coating a substrate with such composition is also provided.
Inventors
- 👤 Arie Noomen
- 👤 Paul M. Vandevoorde
- 👤 Jaap M. Akkerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:52
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F8/32
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
134 words
A liquid coating composition based on a polyacetoacetate, a polyamine having primary and/or secondary amino groups and blocked with a ketone or an aldehyde having not more than 18 carbon atoms, the blocked polyamine and the polyacetoacetate being present in an amount such that the ratio of the number of equivalents of primary and secondary amino groups of the polyamine to the number of equivalents of acetoacetate of the polyacetoacetate is between 1/2 and 2, characterized in that the polyacetoacetate is an acetoacetate groups-containing addition polymer having a large average molecular weight of 1000-100 000, a glass transition temperature of 250°-370° K., a hydroxyl number of 0-200, and a content of acetoacetate groups of 3,5-45% by weight, the acetoacetate groups being present as ester of hydroxyalkyl acrylate, hydroxyalkyl methacrylate or allyl alcohol structural units.
Claim 2
Dependent Claim
134 words
A liquid coating composition based on a polyacetoacetate, a polyamine having primary and/or secondary amino groups and blocked with a ketone or an aldehyde having not more than 18 carbon atoms, the blocked polyamine and the polyacetoacetate being present in an amount such that the ratio of the number of equivalents of primary and secondary amino groups of the polyamine to the number of equivalents of acetoacetate of the polyacetoacetate is between 1/2 and 2, characterized in that the polyacetoacetate is an acetoacetate groups-containing addition polymer having a large average molecular weight of 1000-100 000, a glass transition temperature of 250°-370° K., a hydroxyl number of 0-200, and a content of acetoacetate groups of 3,5-45% by weight, the acetoacetate groups being present as ester of hydroxyalkyl acrylate, hydroxyalkyl methacrylate or allyl alcohol structural units.
Claim 3
Dependent Claim
32 words
A coating composition according to claim 1, characterized in that the polyacetoacetate is in addition polymer containing hydroxyl groups, a number of which have been converted with methyl acetoacetate or ethyl acetoacetate.
Claim 4
Dependent Claim
35 words
A coating composition according to claim 1, characterized in that in its blocked form the polyamine is an aliphatic or cycloaliphatic amine having 2 to 4 primary amino groups and 2 to 200 carbon atoms.
Claim 5
Dependent Claim
20 words
A coating composition according to claim 3, characterized in that the polyamine is a cycloaliphatic polyamine having 5-15 carbon atoms.
Claim 6
Dependent Claim
25 words
A coating composition according to claim 3, characterized in that the polyamine is an adduct of an amine to a diglycidyl ether based on bis(4-hydroxyphenyl)-2,2-propane.
Claim 7
Dependent Claim
24 words
A coating composition according to claim 1, characterized in that the polyamine is blocked with an aliphatic or cycloaliphatic ketone having 3-8 carbon atoms.
Claim 8
Dependent Claim
29 words
A process of coating a substrate with a liquid coating composition, characterized in that use is made of a coating composition according to any one of the claims 1-6.
References Cited (Backward Citations)
US3937679A
Cited
US3668183A
Cited
US4217439A
Cited
US4271237A
Cited
US4217396A
Cited
US4365040A
Cited
US4408018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |