Patent ID: 7687576

Claim:
A thermosetting transparent curable coating composition comprising, (A) from 10 to 40% by weight of at least one (meth)acrylate (co)polymer having a number-average molecular weight of from 1,000 to 6,000 daltons, a glass transition temperature of −15 to +70° C., and a hydroxyl number of from 80 to 200 mg KOH/g, wherein the (meth)acrylate (co)polymer is not formed in the presence of component (B), (B) from 10 to 40% by weight of at least one polyester having a number-average molecular weight of from 800 to 6,000 daltons, a hydroxyl number of from 80 to 200 mg KOH/g and an acid number of from 1 to 50 mg KOH/g, comprising, based on the polyester, from 30 to 70% by weight of cycloaliphatic structural units, (C) from 10 to 40% by weight of at least one blocked polyisocyanate in which the blocked polyisocyanate groups are attached to at least one flexibilizing structural unit which, as part of a three-dimensional network, lowers its glass transition temperature, and (D) from 10 to 40% by weight of at least one blocked polyisocyanate in which at least one of the blocked polyisocyanate groups is attached to at least one hardening structural unit which, as part of a three-dimensional network, raises its glass transition temperature, wherein all % by weight are based on the total weight of (A), (B), (C), and (D).