2-Propenoic acid, 2-methyl-, polymer with butyl 2-methyl-2-propenoate, 2-(dimethylamino)ethyl 2-methyl-2-propenoate and methyl 2-methyl-2-propenoate 67380-24-9 Butyl methacrylate, dimethylaminoethyl methacrylate, methacrylic acid, methyl methacrylate polymer