2-Propenoic acid, 2-methyl-, polymer with butyl 2-propenoate, ethenyl acetate, ethenylpyridine, ethyl 2-propenoate and methyl 2-methyl-2-propenoate 67785-81-3 Butyl acrylate, ethyl acrylate, methacrylic acid, methyl methacrylate, vinyl acetate, vinyl pyridine polymer