Patent ID: 8420214

Claim:
A crosslinkable composition comprising an acid-functional (meth)acrylate copolymer and an aziridine crosslinking agent of the formula: wherein R 1 is a C 1 -C 4 alkyl group attached to carbon 1 and/or carbon 2, and z is 0, 1 or 2, wherein the acid-functional (meth)acrylate copolymer comprises: i. 85 to 99 parts by weight of an (meth)acrylic acid ester of non-tertiary alcohol; ii. 1 to 15 parts by weight of an acid functional ethylenically unsaturated monomer; iii. 0 to 10 parts by weight of a non-acid functional, ethylenically unsaturated polar monomer; iv. 0 to 5 parts vinyl monomer; and v. 0 to 5 parts of a multifunctional (meth)acrylate; based on 100 parts by weight total monomer.