Patent ID: 6559198
Filing Date: 2003-05-06
Classification: C08F,G02B

Abstract:
A contact lens comprising a copolymer consisting essentially of from about 25 to about 60 weight percent of a ethylenically unsaturated fluorosulfone ester monomer having the general formula (I): wherein R1 and R2, which may be the same or different, are hydrogen, alkyl, cyclic or phenyl groups, n is an integer from 1 to 5; and m is an integer from 0 to 10, the balance consisting of at least one co-monomer selected from the group consisting of hydroxyalkyl monomers of acrylic or methacrylic acids, sulfone monomers and pyrrolidinone, and at least one wettability agent selected from the group consisting of methacrylic acid, acrylic acid and mixtures thereof, and optionally a cross-linking agent, a dye or pigment, and mixtures thereof, wherein said copolymer is immersed in saline solution and produces hydrophilic polymer having between 25 to 60 weight percent water content.