2-Butenedioic acid (2Z)-, dibutyl ester, polymer with ethenyl acetate 2-Butenedioic acid (Z)-, dibutyl ester, polymer with ethenyl acetate 25035-90-9 31259-22-0 60842-96-8 62628-34-6 73195-46-7 75923-62-5 Vinyl acetate, dibutyl maleate polymer