Multifunctional crosslinkers and ophthalmic devices formed therefrom - Patents.com

Abstract

The multifunctional crosslinker comprises one or more repeating units of a siloxanyl group or a silyl-alkyl-siloxanyl group and at least two ethylenically unsaturated reactive end groups, one of which is a (meth)acrylate-containing or acrylamide-containing reactive end group and the other of which is an allyl-containing or vinyl-containing reactive end group. The ophthalmic device is formed from the polymerization product of a monomer mixture containing one or more of the multifunctional crosslinkers, one or more first ophthalmic device-forming comonomers having at least one reactive group that reacts preferentially with the (meth)acrylate-containing or acrylamide-containing reactive end group of the multifunctional crosslinker, and one or more second ophthalmic device-forming comonomers having at least one reactive group that reacts preferentially with the allyl-containing or vinyl-containing reactive end group of the multifunctional crosslinker.