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US 5,420,204 AGranted
Light-stabilised copolymer compositions as paint binders
AssigneeCiba-Geigy Corporation
InventorsAndreas Valet, Roger Meuwly, Mario Slongo
Life of this patent
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Abstract
Curable compositions comprising (a) a fluorine- or silicon-containing copolymer, (b) a (meth)acrylic copolymer and (c) at least one curing agent are described, each of the two copolymers comprising functional groups which can react with the curing agent, wherein the fluorine- or silicon-containing copolymer comprises a UV absorber which is chemically bound by reaction with the free reactive groups of the copolymer. These copolymer compositions can be used as paint binders.
Claims17
A curable composition comprising
- (a) fluorine- or silicon-containing copolymer,
- (b) a (meth)acrylic copolymer, and
- (c) a curing agent,
- each of the two copolymers comprising functional groups which can react with the curing agent, and wherein the fluorine- or silicon-containing copolymer (a) comprises a UV absorber, which is a derivative of a 2-(2-hydroxyphenyl)-benzotriazole, a 2-(2-hydroxyphenyl)-1,3,5-triazine or an o-hydroxybenzophenone, and which is chemically bound by reaction with the free reactive groups of the finished copolymer.
1 more element
A process for preparing a curable composition, which comprises
- reacting a fluorine- or silicon-containing copolymer comprising free functional groups with a UV absorber, which is a derivative of a 2-(2-hydroxyphenyl)-benzotriazole, a 2-(2-hydroxyphenyl)-1,3,5-triazine or an o-hydroxybenzophenone, and which contains reactive groups which can react with the functional groups of the copolymer, and
- mixing the product with a (meth)acrylic copolymer, which likewise comprises functional groups, and a curing agent.
Dependencies are inferred from the claim text.