Ocular lens material

An ocular lens material made of a copolymer comprising, as main copolymer components, (A) a polysiloxane macromonomer having polymerizable groups bonded via one or more urethane bonds to the siloxane main chain, of the formula (I):

• A.sup.1 -U.sup.1 -(-S.sup.1 -U.sup.2 -).sub.n -S.sup.2 -U.sup.3 -A.sup.2(I)
• wherein A.sup.1 is a group of the formula (II):
• Y.sup.21 -R.sup.31 - (II)
• wherein Y.sup.21 is an acryloyloxy group, a methacryloyloxy group, a vinyl group or an allyl group, and R.sup.31 is a linear or branched alkylene group having from 2 to 6 carbon atoms;
• A.sup.2 is a group of the formula (III):
• R.sup.34 -Y.sup.22 (III)
• wherein Y.sup.22 is an acryloyloxy group, a methacryloyloxy group, a vinyl group or an allyl group, and R.sup.34 is a linear or branched alkylene group having from 2 to 6 carbon atoms;
• U.sup.1 is a group of the formula (IV):
• -X.sup.21 -E.sup.21 -X.sup.25 -R.sup.32 - (IV)
• wherein X.sup.21 is an oxygen atom or an alkylene glycol group having from 1 to 6 carbon atoms, E.sup.21 is a bivalent group derived from a diisocyanate selected from the group consisting of saturated aliphatic, alicyclic and aromatic diisocyanates, X.sup.25 is an alkylene glycol group having from 1 to 6 carbon atoms, and R.sup.32 is a linear or branched alkylene group having from 1 to 6 carbon atoms;
• each of S.sup.1 and S.sup.2 independently represents a group of the formula (V):
• ##STR6## wherein each of R.sup.23, R.sup.24, R.sup.25, R.sup.26, R.sup.27 and R.sup.28 independently represents an alkyl group having from 1 to 3 carbon atoms or a phenyl group, K is an integer of from 1 to 50, and L is zero or an integer up to (50-K);
• U.sup.2 is a group of the formula (VI):
• -R.sup.37 -X.sup.27 -E.sup.24 -X.sup.28 -R.sup.38 - (VI)
• wherein each of R.sup.37 and R.sup.38 independently represents a linear or branched alkylene group having from 1 to 6 carbon atoms, each of X.sup.27 and X.sup.28 independently represent an alkylene glycol group having from 1 to 6 carbon atoms, and E.sup.24 is a bivalent group derived from a diisocyanate selected form the group consisting of saturated aliphatic, alicyclic and aromatic diisocyanates (provided that in this case, E.sup.24 forms a urethane bond together with X.sup.27 and X.sup.28);
• U.sup.3 is a group of the formula (VII):
• -R.sup.33 -X.sup.26 -E.sup.22 -X.sup.22 -
• wherein R.sup.33 is a linear or branched alkylene group having from 1 to 6 carbon atoms, X.sup.22 is an oxygen atom or an alkylene glycol group having from 1 to 6 carbon atoms, X.sup.26 is an alkylene glycol group having from 1 to 6 carbon atoms, and E.sup.22 is a bivalent group derived from a diisocyanate selected from the group consisting of saturated aliphatic, alicyclic and aromatic diisocyanates;
• and
• n is an integer of at least 1;
• and (B) an alkyl(meth)acrylamide, wherein the weight ratio of the polysiloxane macromonomer to the alkyl(meth)acrylamide is from 10:90 to 90:10.