Patent ID: 7482416
Filing Date: 2009-01-27
Classification: A61L,C08F,G02B

Abstract:
1. A copolymer prepared by polymerizing a monomer mixture comprising, (A) 10 to 80 weight % of at least one prepolymer selected from the group consisting of compounds having the following formula: and 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, and (B) 10 to 90 weight % of at least one copolymerizable device-forming monomer.