Patent ID: 7838110

Claim:
A photoactive crosslinking compound having the general formula: wherein R 1 is H or a C 1 to C 4 alkyl group; o is 0 to 2; X 1 and X 2 are each independently —O— or —NH—; R 2 is a divalent alkylene of 2 to 10 carbon atoms or —(R 3 ) 2 C(CH 2 ) m (CO)OR 9 —, where m is 0 or 1, R 3 is H or a C 1 to C 4 alkyl group, and R 9 is a C 2 -C 6 alkylene; n is 0 or 1, R 7 is H or CH 3 ; and Z is a photoinitiator group.