2-Propenoic acid, 2-methyl-, polymer with butyl 2-propenoate, ethyl2-propenoate, methyl 2-methyl-2-propenoate and 2-propenoic acid 71808-69-0 Acrylic acid, butyl acrylate, ethyl acrylate, methacrylic acid, methyl methacrylate polymer