2-Propenoic acid, 2-methyl-, butyl ester, polymer with 2-hydroxyethyl 2-methyl-2-propenoate and methyl 2-methyl-2-propenoate 31942-54-8 Butyl methacrylate, methyl methacrylate, hydroxyethyl methacrylate polymer Butyl methacrylate, polymer with methyl methacrylate and hydroxyethyl methacrylate