| abstract |
The invention provides a material for contact lenses, including a first siloxane macromer shown as formula (I): n nin formula (I), R 1 , R 2 and R 3 are 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 C 1 -C 4 alkylene groups and m is an integer of about 1-2, n is an integer of about 4-80; a second siloxane macromer shown as formula (II):n n nin formula (II), R 9 , R 10 and R 11 are C 1 -C 4 alkyl groups, R 12 , R 13 and R 15 are C 1 -C 3 alkylene group, R 14 is a residue obtained by removing NCO group from an aliphatic or aromatic diisocyanate, and o is an integer of about 4-80, p is an integer of about 0-1; q is an integer of about 1-20; at least one hydrophilic monomer and an initiator. |