2-Propenoic acid, 2-methyl-, butyl ester, polymer with eicosyl 2-methyl-2-propenoate, hexadecyl 2-methyl-2-propenoate and octadecyl 2-methyl-2-propenoate 68171-45-9 Butyl methacrylate, cetyl methacrylate, stearyl methacrylate, eicosyl methacrylate polymer