Patent ID: 8404759
Filing Date: 2013-03-26
Classification: C08F,G02B

Abstract:
1. A soft contact lens, comprising a silicone hydrogel material obtained by curing a lens-forming material in a mold, wherein the lens-forming material comprises an actinically crosslinkable prepolymer and at least one first hydrophilic vinylic monomer, wherein the prepolymer comprises: in the copolymer chain of the prepolymer, (1) siloxane units derived from one or more siloxane-containing vinylic monomers and/or one or more siloxane-containing macromers; (2) hydrophilic units derived from one or more second hydrophilic vinylic monomers and/or one or more hydrophilic macromers; (3) chain-extending units having latent UV-AFRG moieties and derived from one or more vinylic monomer of formula (II) or (III) (4) ethylenically unsaturated groups, wherein the silicone hydrogel material includes dangling hydrophilic polymer chains each of which is formed from the first hydrophilic vinylic monomer and covalently attached to the polymer matrix of the silicone hydrogel material through one of the chain-extending units, wherein the formed soft contact lens has a hydrophilic surface without post-curing surface treatment.