Patent ID: 8546479

Claim:
A high-gloss coating composition comprising a crosslinker selected from the group consisting of aminoplast compounds and isocyanates, and a water-reducible mixture of (meth)acrylic copolymers having a hydroxyl number of from 40 mg/g to 250 mg/g, an acid number of from 15 mg/g to 80 mg/g, a weight average molar mass M w from 9 kg/mol to 40 kg/mol and a glass transition temperature T g from −40° C. to 80° C., wherein polymerized monomers of the mixture comprising at least one alkyl ester A of an olefinically unsaturated carboxylic acid having from 1 to 8 carbon atoms in the alkyl group, at least one hydroxy functional alkyl ester B of an olefinically unsaturated carboxylic acid, at least one aliphatic compound C that has both hydroxy and carboxyl functionalities, or which is a lactone or a cyclic lactone, at least one vinyl monomer D which does not comprise a moiety derived from an olefinically unsaturated carboxylic acid, and at least one olefinically unsaturated carboxylic acid E selected from the group consisting of acrylic acid and methacrylic acid, wherein the mixture comprises a hydroxy-functional copolymer 1 which has a mass fraction of moieties derived from monomers A, B, C, and D as follows: from 5% to 35% for A, from 15% to 40% for B, from 2% to 20% for C, and from 25% to 55% for D, a carboxyl-functional copolymer 2 which has a mass fraction of moieties derived from monomers A, D, and E as follows: from 25% to 80% for A, from 10% to 40% for D, and from 10% to 50% for E, and a copolymer 12 which is the product of esterification of copolymer 1 with copolymer 2, under consumption of from 0.5% to 20% of the carboxyl groups of copolymer 2.