Patent ID: 9086528
Filing Date: 2015-07-21
Classification: C08F,C08G,C08L,G02B

Abstract:
1. A method for manufacturing contact lenses comprising: (a) mixing a first siloxane macromer represented by the following formula (I), a second siloxane macromer represented by the following formula (II), at least one hydrophilic monomer, an initiator and a solvent to form a mixture; and (b) injecting the mixture into a mold of contact lens and conducting a thermal treatment or a UV irradiating treatment to the mixture to form contact lenses; wherein the number average molecular weight of the first siloxane macromer of formula (I) is 1,000 to 10,000 and the first siloxane macromer has a cross-linking function: wherein R wherein a second siloxane macromer is selected from the group consisting of a siloxane macromer represented by the following formula (II) and a siloxane macromer represented by the following formula (III), wherein in formula (II), p is an integer of 4 to 80, and in formula (III), q is an integer of 4 to 80 and r is an integer of 3 to 40; and wherein the hydrophilic monomer is selected from a group consisting of N-vinylpyrrolidone (NVP), 2-hydroxyethyl methacrylate (HEMA), N,N-dimethylacrylamide (DMA), methyl acrylic add, acrylic add, glycidyl methacrylate (GMA), (methyl)acrylamide, 2-(N,N-dimethylamino) ethyl methacrylate (DMAEMA), vinyl acetate, 2-(Dimethylamino)ethyl methacrylate, N-acrylolmorpholine and a combination thereof.