1,3-Benzenedicarboxylic acid, polymer with 2,2-bis(hydroxymethyl)-1,3-propanediol, 2,5-furandione, 1,3-isobenzofurandione and 1,2-propanediol 65605-80-3 Polymer of propylene glycol, phthalic anhydride, maleic anhydride, isophthalic acid, pentaerythritol