Itaconate copolymeric compositions for contact lenses

Abstract

Copolymers useful as contact lens materials are the polymerization product of a mixture comprising: (a) an itaconate; (b) a compound represented by formula (I): ##STR1## wherein: each A is independently an activated unsaturated radical; each R is independently selected from the group consisting of a C.sub.1 -C.sub.12 monovalent hydrocarbon radical, a C.sub.1 -C.sub.12 monovalent hydrocarbon radical containing ether linkages, a halogen-substituted C.sub.1 -C.sub.12 monovalent hydrocarbon radical, and a halogen-substituted C.sub.1 -C.sub.12 monovalent hydrocarbon radical containing ether linkages; each R' is independently a C.sub.1 -C.sub.22 divalent hydrocarbon radical; and n averages about 15 to about 50; (c) an ethylenically unsaturated organosiloxane monomer; and (d) a hydrophilic monomer.

Dependencies are inferred from the claim text.