Patent ID: 7411029

Claim:
A prepolymer selected from the group consisting of compounds having the following formula: YCO—CH═CHCOW(R 1 )(SiR 2 R 3 O) m (SiR 2 R 3 )(R 1 )WOCCH═CH—COY CH 2 ═C(CH 2 COY)COW(R 1 )(SiR 2 R 3 O) m (SiR 2 R 3 )(R 1 )WOC(CH 2 COY)C═CH 2 and CH 2 ═C(CH 2 COY)COW(R 1 )(SiR 2 R 3 O) m (SiR 2 R 3 )(R 1 )WOCCH 2 (COY)C═CH 2 wherein R 1 is selected from the group consisting of alkylenes and alkylenes containing ether linkages, R 2 and R 3 are independently alkyl or phenyl groups, unsubstituted or substituted with halogen and ether linkages, W is O or NH, m is an integer between 2 and 200, and Y is a residue derived from a reactive oligomer of hydrophilic monomers.