2-Butenedioic acid (2Z)-, dibutyl ester, polymer with butyl hydrogen (2Z)-2-butenedioate and chloroethene 2-Butenedioic acid (Z)-, dibutyl ester, polymer with (Z)-butyl hydrogen 2-butenedioate and chloroethene 68797-32-0 Vinyl chloride, dibutyl maleate, hydrogen butyl maleate terpolymer