Patent CA-2007852-C (CA)
Title: Soft ocular lens material
Inventor: IWATA NORIKO
IPC: C08F283/12
Filed: 1990-01-16
Granted: 2000-05-23
Abstract: A soft ocular lens material made of a copolymer consisting essentially of: (A) from 5 to 70 parts by weight of a fluorine-containing (meth)acrylate; (B) from 5 to 60 parts by weight of an alkyl (meth)acrylate; (C) from 3 to 45 parts by weight of a polysiloxane macromonomer having polymerizable groups at both terminals, of the formula I:    wherein each of Y11 and Y12 independently represents an acryloyl group, a methacryloyl group, a vinyl group or an allyl group; each of X11 and X12 independently represents a covalent bond, an oxygen atom or an alkylene glycol group; each of R11 and R12 independently represents a linear or branched alkylene group having from 1 to 6 carbon atoms; each of R13, R14, R15, R16, R17 and R18 independently represents an alkyl group having from 1 to 3 carbon atoms or. a phenyl group; i is an integer of from 1 to 1500; and j is an integer of from 0 to 1499 (provided that i+j is at most 1500); and (D) from 3 to 40 parts by weight of a polysiloxane macromonomer having polymerizable groups bonded via one or two urethane bonds to the siloxane main chain, of the formula II:    wherein each of Y21 and Y22 independently represents a group selected from the group consisting of an acryloyloxy group, a methacryloyloxy group, a vinyl group and an allyl group; each of R31 and R34 independently represents a linear or branched alkylene group having from 2 to 6 carbon atoms; each of X21 and X22 independently represents a covalent bond, an oxygen atom or an alkylene glycol group; each of R32 and R33 independently represents a linear or branched alkylene group having from 1 to 6 carbon atoms; each of R23, R24, R25, R26, R27 and R28 independently represents an alkyl group having from 1 to 3 carbon atoms or a phenyl group; each of E21 and E22 independently represents -NHCO-(provided that in this case, each of X21 and X22 is a covalent bond, E21 forms a urethane band together with X25, and E22 forms a urethane bond together with X26) or a bivalent group derived from a diisocyanate selected from the group consisting of saturated aliphatic, alicyclic and aromatic diisocyanates (provided that in this case, each of X21 and X22 independently represents an oxygen atom or an alkylene glycol group, E21 forms a urethane band together with X21 and X25, and E22 forms a urethane bond together with X22 and X26); each of X25 and X26 independently represents an oxygen atom, an alkylene glycol or a group represented by the formula V:    wherein R41 is a trivalent hydrocarbon group having from 1 to 6 carbon atoms; Y23 represents a group selected from the group consisting of an acryloyloxy group, a methacryloyloxy group, a vinyl group and a allyl group;      R36 represents a linear or branched alkylene group having from 2 to 6 carbon atoms; X23 represents a covalent bond, an oxygen atom or an alkylene glycol group; E23 represents -NHCO- (provided that in this case, X23 is a covalent bond) or a bivalent group derived from a diisocyanate selected from the group consisting of saturated aliphatic, alicyclic and aromatic diisocyanates (provided that in this case, X23 is an oxygen atom or an alkylene glycol group), which forms a urethane bond together with X23 and the adjacent oxygen atom bonded to R41; a is an integer of from 1 to 1500; and b is an integer of from 0 to 1499. provided a+b ~ 1500; as essential copolymer components.