Patent ID: 7342047

Claim:
A hydrophilic, crosslinkable oligomer composition comprising a) a first component oligomer comprising a plurality of polymerized monomer units having pendent hydrophilic poly(alkylene oxide) groups of the formula: Z-Q-(CH(R 1 )—CH 2 -Q) n -R 2 , wherein Z is a polymerizable ethylenically unsaturated moiety, R 1 is a H or a C 1 to C 4 alkyl group, R 2 is a H, a C 1 to C 4 alkyl group, aryl group, or combinations thereof and n is from 2 to 100, and Q is a divalent linking group selected from —O—, —NR 1 —, —CO 2 — and —CONR 1 —, and a plurality of polymerized ethylenically-unsaturated monomer units having pendent, ethylenically unsaturated free-radically polymerizable functional groups; and b) a hydrophilic poly(alkylene oxide) crosslinking agent having polymerizable, ethylenically unsaturated terminal groups.