Patent ID: 7858692

Claim:
A coating composition comprising crosslinkable and crosslinking components, wherein said crosslinkable component comprises: a copolymer having on an average 2 to 25 crosslinkable groups selected from the group consisting of hydroxyl, acetoacetoxy, and a combination thereof; a weight average molecular weight ranging from about 1000 to 4500; a polydispersity ranging from about 1.05 to 2.5; wherein said copolymer is polymerized from a monomer mixture comprising one or more non-functional acrylate monomers and one or more functional methacrylate monomers provided with said crosslinkable groups; wherein said functional methacrylate monomers are present in an effective amount for producing said copolymer having on an average 2 to 25 crosslinkable groups and having said weight average molecular weight; wherein said copolymer is produced by free radical polymerization of said monomer mixture at a polymerization temperature ranging from about 120° C. to 300° C.; and wherein said crosslinking component for said crosslinkable groups is selected from the group consisting of polyisocyanate, polyamine, ketimine, melamine and a combination thereof; and wherein said monomer mixture includes 100% to 80% of the total amount of the non-functional acrylate monomers and the functional methacrylate monomers, percentage being in weight percentage based on the weight of the monomer mixture.