2-Propenoic acid, 2-methyl-, polymer with butyl 2-propenoate, ethenylbenzene, 1-ethenyl-2-pyrrolidinone and methyl 2-methyl-2-propenoate 67906-97-2 Methyl methacrylate, styrene, N-vinyl-2-pyrrolidone, methacrylic acid, butyl acrylate polymer