2-Propenoic acid, 2-methyl-, polymer with butyl 2-propenoate, methyl 2-methyl-2-propenoate and 2-methyl-2-propenamide 28575-53-3 Butyl acrylate, methacrylamide, methacrylic acid, methyl methacrylate polymer Methyl methacrylate, butyl acrylate, methacrylamide, methacrylic acid polymer