2-Butenedioic acid (2E)-, polymer with 1,2-ethanediol, 1,2-propanediol, 4,5,6,7-tetrabromo-1,3-isobenzofurandione and 4,5,6,7-tetrachloro-1,3-isobenzofurandione 68239-95-2 Tetrabromophthalic anhydride, tetrachlorophthalic anhydride, fumaric acid, ethylene glycol, propylene glycol polyester