1,3-Benzenedicarboxylic acid, polymer with 2-ethyl-2-(hydroxymethyl)-1,3-propanediol, 1,6-hexanediol and 1,3-isobenzofurandione 1,6-Hexanediol, isophthalic acid, phthalic anhydride, trimethylolpropane polymer 68123-50-2