2-Butenedioic acid (2Z)-, polymer with 2-methyl-2-propenoic acid and 2-propenoic acid 2-Butenedioic acid (Z)-, polymer with 2-methyl-2-propenoic acid and 2-propenoic acid 67785-62-0 Acrylic acid, methacrylic acid, maleic acid polymer