2-Propenoic acid, 2-methyl-, polymer with butyl 2-methyl-2-propenoate, butyl 2-propenoate, ethenylbenzene and methyl 2-methyl-2-propenoate 25950-40-7 Styrene, methyl methacrylate, butyl methacrylate, butyl acrylate, methacrylic acid polymer