POLYMER COMPOSITIONS FOR CONTACT LENSES

摘要

Copolymers useful as a contact lens material are prepared from a mixture comprising: (a) an N,N-dialkyl(meth)acrylamide monomer; and (b) a monomer represented by formula (I) wherein: R<1> is methyl or hydrogen; R<2> is -O- or -NH-; R<3> and R<4> are independently a divalent radical selected from the group consisting of -CH2-, -CHOH- and -CHR<6>-; R<5> and R<6> are independently a branched C3-C8 alkyl group; and n is an integer of at least 1, and m and p are independently 0 or an integer of at least 1, provided that the sum of m, p and n is 2, 3, 4 or 5.