2-Propenoic acid, 2-methyl-, polymer with methylenebutanedioic acid and 2-propenoic acid 2-Propenoic acid, polymer with methylenebutanedioic acid and 2-methyl-2-propenoic acid Acrylic acid-itaconic acid-methacrylic acid copolymer Butanedioic acid, 2-methylene-, polymer with 2-methyl-2-propenoic acid and 2-propenoic acid Butanedioic acid, methylene-, polymer with 2-methyl-2-propenoic acid and 2-propenoic acid Polacryl WT 315A