2-Propenoic acid, 2-methyl-, polymer with 2-((1,1-dimethylethyl)amino)ethyl 2-methyl-2-propenoate and 2-methylpropyl 2-methyl-2-propenoate 66028-09-9 Isobutyl methacrylate, methacrylic acid, tert-butylaminoethyl methacrylate polymer