Patent ID: 8071658
Filing Date: 2011-12-06
Classification: C08F,C08G,C08L,G02B

Abstract:
1. An actinically crosslinkable prepolymer, comprising: (1) dangling polysiloxane units derived from one or more monoethylenically functionalized polysiloxane-containing monomers and/or one or more monoethylenically-functionalized polysiloxane-containing macromers, wherein the dangling polysiloxane units is free of ethylenically unsaturated group; (2) hydrophilic units derived from one or more hydrophilic vinylic monomers; (3) polysiloxane-containing crosslinking units derived from at least one polysiloxane-containing crosslinker, wherein said at least one polysiloxane-containing crosslinker comprises two or more ethylenically unsaturated groups and a moiety of in which R 1 and R 2 are independently a monovalent C 1 -C 10 alkyl, C 1 -C 10 ether, C 1 -C 10 fluoroalkyl, C 1 -C 10 fluoroether, or C 6 -C 18 aryl radical, which mah comprise hydroxy group, primary, secondary, or tertiary amine group, carboxy group, or carboxylic acid; n is an integer of 4 or higher; and (4) optionally hydrophobic units derived from at least one hydrophobic vinylic monomer, wherein the prepolymer comprises multiple ethylenically unsaturated groups and is capable of being actinically crosslinked, in the absence of one or more monomers, to form a silicone hydrogel contact lens.