US 5,849,835 A · Polyisocyanate cured ultradurable glossy coating compositions

Abstract

A curable, film-forming composition is provided which includes: (a) a hydroxyl-containing acrylic solution polymer, and (b) a polyisocyanate crosslinking agent. The hydroxyl-containing acrylic solution polymer is present in an amount ranging from between about 60 to about 90 weight percent; and, the polyisocyanate crosslinking agent is present in an amount ranging from between about 10 to about 40 weight percent. The acrylic solution polymer is the reaction product of: (a) a cycloaliphatic and/or aromatic ester of (meth)acrylic acid having at least 6 carbon atoms in the cycloaliphatic and/or aromatic group, and (b) a hydroxyl functional acrylic monomer component. The hydroxyl functional acrylic monomer component is present in an amount such that the hydroxyl number of the resulting acrylic solution polymer is less than 60. This invention also provides a color-plus-clear coating system. This system includes: (a) applying a film-forming base coat onto a substrate, and (b) applying a clear, film-forming topcoat over the base coat. The clear topcoat includes the curable, film-forming composition described above.

Claims20

Dependent claims

A film-forming coating composition comprising:

(a) a hydroxyl-containing acrylic solution polymer which is the polymerization product of monomeric components consisting of:
(i) a first monomeric component employed in an amount ranging from about 45 to about 95 weight percent, said weight percentages being based upon the total weight of all monomers used in preparing the hydroxyl-containing acrylic solution polymer, said first monomeric component is at least one compound selected from the group consisting of:
a. cycloaliphatic esters of (meth)acrylic acid selected from the group consisting of t-butyl-cyclohexyl (meth)acrylate and cyclohexyl (meth)acrylate, and
b. aromatic esters of (meth)acrylic acid, and
(ii) a second monomeric component which consists of at least one hydroxyl functional acrylic monomer present in an amount such that the hydroxyl number of the resulting acrylic solution polymer is less than 60, and
(b) a polyisocyanate crosslinking agent.

3 more elements

A film-forming coating composition comprising:

(a) a hydroxyl-containing acrylic solution polymer which is the polymerization product of monomeric components consisting of:
(i) a first monomeric component employed in an amount ranging from about 45 to about 95 weight percent, said weight percentages being based upon the total weight of all monomers used in preparing the hydroxyl-containing acrylic solution polymer, said first monomeric component is at least one compound selected from the group consisting of:
a. cycloaliphatic esters of (meth)acrylic acid selected from the group consisting of t-butyl-cyclohexyl (meth)acrylate and cyclohexyl (meth)acrylate, and
b. aromatic esters of (meth)acrylic acid,
(ii) a second monomeric component employed in an amount up to about 45 weight percent, said weight percentage being based upon the total weight of all monomers used in preparing the hydroxyl-containing acrylic solution polymer, said second monomeric component is at least one compound selected from the group consisting of:
vinyl aromatic compounds, and alkyl (meth)acrylates containing from 1 to 8 carbon atoms in the alkyl group, and
(iii) a third monomeric component which consists of at least one hydroxyl functional acrylic monomer present in an amount such that the hydroxyl number of the resulting acrylic solution polymer is less than 60, and
(b) a polyisocyanate crosslinking agent.

5 more elements

Dependencies are inferred from the claim text.

Polyisocyanate cured ultradurable glossy coating compositions

Life of this patent

Polyisocyanate cured ultradurable glossy coating compositions

Life of this patent

Abstract

Claims20