2-Hydroxyethyl methacrylate polymer with 1-vinyl-2-pyrrolidinone and methacrylic acid 2-Propenoic acid, 2-methyl-, 2-hydroxyethyl ester polymer with 1-ethenyl-2-pyrrolidinone and 2-methyl-2-propenoic acid 2-Propenoic acid, 2-methyl-, polymer with 1-ethenyl-2-pyrrolidinone and 2-hydroxyethyl 2-methyl-2-propenoate 37017-46-2 Perfilcon A Perfilcon A [USAN] Permalens