Patent ID: 6602930
Filing Date: 2003-08-05
Classification: C08F,C08G,G02B

Abstract:
A material for contact lenses which comprises a copolymer essentially comprising a siloxane macromer of component (A) which has the number-average molecular weight of from about 1,000 to 10,000 and is represented by the general formula (I): wherein R1, R2 and R3 are independently selected from C1-C4 alkyl groups; R4 is selected from C1-C6 alkyl groups; R5 is a residue obtained by removing NCO group from an aliphatic, alicyclic or aromatic diisocyanate; R6, R7, R8 and R9 are independently selected from C1-C3 alkylene groups; n is an integer of from 4 to 80; and m and p are independently an integer of from 3 to 40,a water-insoluble monoolefin monomer of component (B), and a water-soluble monoolefin monomer of component (C).