1,3-Benzenedicarboxylic acid, polymer with 1,4-butanediol, 1,2-ethanediol, hexahydro-1,3-isobenzofurandione and nonanedioic acid 1,4-Butanediol, ethylene glycol, isophthalic acid, azelaic acid, hexahydrophthalic anhydride polymer 68133-50-6