2-Propenoic acid, 2-methyl-, butyl ester, polymer with 2-hydroxyethyl 2-methyl-2-propenoate, methyl 2-methyl-2-propenoate and 2-methylpropyl 2-methyl-2-propenoate 70729-76-9 Butyl methacrylate, hydroxyethyl methacrylate, isobutyl methacrylate, methyl methacrylate polymer