Patent ID: 7714076

Claim:
A crosslinkable composition comprising an acid-functional (meth)acrylate copolymer and an aziridine crosslinking agent of the formula: where R 2 is —H, or —CH 3 ; each R 3 is independently H or a C 1 -C 4 alkyl group; z is 0, 1 or 2; A is —O—R 6 —Z or —N(R 3 )R 8 R 8 is H, C 1 -C 4 alkyl or —R 6 —Z, R 6 is a divalent alkylene or arylene group, and Z is a water-solubilizing group, selected from ammonium, phosphonium, sulfonium, carboxylate, sulfonate, phosphate, phosphonate, phosphinate, poly(oxyalkylene) or hydroxyl groups.