2-Propenoic acid, 2-methyl-, 2-((1,1-dimethylethyl)amino)ethyl ester, polymer with 2-methylpropyl 2-methyl-2-propenoate 40008-96-6 54547-42-1 Isobutyl methacrylate, t-butylaminoethyl methacrylate polymer Isobutyl methacrylate, tert-butylaminoethyl methacrylate polymer t-Butylaminoethyl methacrylate, isobutyl methacrylate polymer