2-Propenoic acid, 2-methyl-, oxiranylmethyl ester, polymer with ethyl 2-propenoate 26591-04-8 81406-07-7 COP Ethyl 2-propenoate, oxiranylmethyl 2-methyl-2-propenoate copolymer Glycidyl methacrylate and ethylacrylate copolymer