Patent ID: 6649688
Filing Date: 2003-11-18
Classification: C08G,C09D

Abstract:
A coating composition comprising at least three components, comprising(I) a hydroxyl-containing binder dispersed or dissolved in a medium comprising one or more organic solvents comprising A. at least one hydroxyl-containing polyacrylate resin, wherein the hydroxyl-containing polyacrylate resin consists of a reaction product of a (meth)acrylate containing polyether groups and at least one monomer selected from the group consisting of i) a (meth)acrylic ester that is free from acid groups and does not contain polyether groups, ii) an ethylenically unsaturated monomer that carries at least one hydroxyl group per molecule and is free from acid groups, iii) at least one vinyl ester of an alpha-branched monocarboxylic acid having from 5 to 18 carbon atoms per molecule, iv) a reaction product of a (meth)acrylic acid with a glycidyl ester of an alpha-branched monocarboxylic acid having 5 to 18 carbon atoms per molecule, v) an ethylenically unsaturated monomer that is free from acid groups, and vi) combinations thereof, â€ƒwherein each monomer is copolymerizable with other monomers, and B. optionally, at least one hydroxyl-containing oligomeric or polymeric resin, (II) a crosslinking agent comprising A. at least one polyisocyanate dispersed or dissolved in one or more organic solvents, and B. optionally, at least one further crosslinking agent, and (III) a component comprising A. water, and B. optionally, a second hydroxyl-containing binder comprising at least one of i) a second at least one hydroxyl-containing polyacrylate resin, and ii) a second at least one hydroxyl-containing oligomeric or polymeric resin dispersed or dissolved in one or more organic solvents, wherein the at least one hydroxyl-containing polyacrylate resin and the second at least one hydroxyl containing polyacrylate resin each independently contain polyether sidegroups, endgroups, or sidegroups and endgroups and the polyether is represented by general formula IYâ€”(â€”Oâ€”Râ€”)nâ€”â€ƒâ€ƒ(I) in which the index and variables have the following meanings:n=3 to 100; R=C1 to C6 alkanediyl or C3 to C6 cyclo-alkanediyl; Y=hydrogen atom or C1 to C4 alkyl.