Patent ID: 9046641
Filing Date: 2015-06-02
Classification: C08F,C08G,C08L,G02B

Abstract:
1. A silicone hydrogel composition, comprising: at least one silicone macromer in the amount of 5 to 50 wt % based on the total weight of the composition, wherein the silicone macromer has a structure of chemical formula (1): a hydroxy-functionalized silicone-containing monomer in the amount of 5 to 50 wt % based on the total weight of the composition, wherein the hydroxy-functionalized silicone-containing monomer has a structure of chemical formula (2): wherein J is a hydrogen atom or a methyl group; r is an integer from 2 to 10; K 1 , K 2 and K 3 are each a methyl group or a trimethylsiloxy (—OSi(CH 3 ) 3 ) in which at least one K 1 , K 2 and K 3 is a methyl group or one trimethylsiloxy (—OSi(CH 3 ) 3 ); a first hydrophilic monomer in the amount of 30 to 60 wt % based on the total weight of the composition, wherein the first hydrophilic monomer is N-vinyl pyrrolidone, and the silicone macromer, the hydroxy-functionalized silicone-containing monomer or a combination thereof are mutually soluble with N-vinylpyrrolidone; and at least one crosslinker in the amount of less than 20 wt % based on the total weight of the composition.