2-Propenoic acid, 2-methyl-, polymer with butyl 2-methyl-2-propenoate, methyl 2-methyl-2-propenoate and 1,2-propanediol mono(2-methyl-2-propenoate) 9072-87-1 Methyl methacrylate, methacrylic acid, butyl methacrylate, hydroxypropyl methacrylate polymer