1,3-Benzenedicarboxylic acid, polymer with 1,3-dihydro-1,3-dioxo-5-isobenzofurancarboxylic acid, 2,5-furandione and 1,2-propanediol, ammonium salt 70833-44-2 Propylene glycol, maleic anhydride, isophthalic acid, trimellitic anhydride polymer, ammonium salt