Patent ID: 8691983

Claim:
A composition comprising a photoreactive cross-linking compound having a formula: L-(T-C(R 1 (XP)CHR 2 GR 3 C(═O)R 4 ) m wherein L is a linking group comprising a formula according to structure (I): A, B, and J form a ring wherein A and J are C=O; B is NR 11 ; R 11 is a hydrogen atom, an alkyl group, an aryl group or denotes a bond with T; T is —(CH 2 ) x —; R 1 is a hydrogen atom, an alkyl, alkyoxyalky, aryl, aryloxyalkyl or aryloxyaryl group; X is O; P is a hydrogen atom; R 2 is a hydrogen atom, an alkyl, alkyloxyalkyl, aryl, aryloxyalkyl or aryloxyaryl group; G is —O—; R 3 and R 4 are each independently an aryl; R is a hydrogen atom, an alkyl or aryl group; m is 2 or 3; x is an integer from 1 to about 500; and a polymerizable monomer.