1,3-Benzenedicarboxylic acid, polymer with (2E)-2-butenedioic acid,2,2-dimethyl-1,3-propanediol, 2,5-furandione and 4,5,6,7-tetrahydro-1,3-isobenzofurandione 70833-60-2 Isophthalic acid, tetrahydrophthalic anhydride, maleic anhydride, fumaric acid, neopentyl glycol polymer