2-Butenedioic acid (2Z)-, polymer with 2-methylenebutanedioic acid and 2-propenoic acid 2-Butenedioic acid (2Z)-, polymer with methylenebutanedioic acid and 2-propenoic acid 2-Butenedioic acid (Z)-, polymer with methylenebutanedioic acid and 2-propenoic acid 2-Propenoic acid, polymer with (2Z)-2-butenedioic acid and methylenebutanedioic acid 2-Propenoic acid, polymer with (Z)-2-butenedioic acid and methylenebutanedioic acid Acrylic acid-itaconic acid-maleic acid copolymer Acrylic acid-itaconic acid-maleic acid polymer Acrylic acid-maleic acid-itaconic acid polymer Butanedioic acid, methylene-, polymer with (2Z)-2-butenedioic acid and 2-propenoic acid Butanedioic acid, methylene-, polymer with (Z)-2-butenedioic acid and 2-propenoic acid