2-Propenoic acid, 2-methyl-, methyl ester, polymer with butyl 2-propenoate and 2-hydroxyethyl 2-propenoate 25951-38-6 67017-25-8 Acrylic acid, butyl ester, acrylic acid, 2-hydroxyethyl ester, methacrylic acid, methyl ester polymer Butyl acrylate - hydroxyethyl acrylate - methyl methacrylate copolymer