Patent ID: 9703009
Date: 2017-07-11
CPC Classifications: B29D,B29K,C08G,C08L,G02B

Claim:
1. A composition for manufacturing contact lenses comprising: a first siloxane macromer with the number average molecular weight in a range of 500 to 10,000, represented by the following formula (I) wherein in formula (I), R 1 , R 2 and R 3 are independently C 1 -C 4 alkyl groups, R 4 is C 1 -C 6 alkyl group, R 5 is C 1 -C 4 alkylene group, R 6 is —OR 7 O— or —NH—, R 7 and R 8 are independently C 1 -C 4 alkylene groups, m is an integer of 1 to 2 and n is an integer of 4 to 80; a second siloxane macromer, with the number average molecular weight in a range of 1,000 to 10,000, represented by the following formula (II) wherein in formula (II), R 9 , R 10 and R 11 are independently C 1 -C 4 alkyl groups, R 12 , R 13 , R 15 , are independently C 1 -C 3 alkylene groups, R 14 is a residue obtained by removing NCO group from an aliphatic or aromatic diisocyanate, o is an integer of 4 to 80, p is an integer of 0 to 1 and q is an integer of 1 to 20; at least one hydrophilic monomer; and an initiator.