1,4-Benzenedicarboxylic acid, 1,2,4-benzenetricarboxylic anhydride,2,2'-((1-methylethylidene)bis(1,4-phenyleneoxy))bis(ethanol), 1,1'-((1-methylethylidene)bis(1,4-phenyleneoxy))bis(2-propanol) polymer 1,4-Benzenedicarboxylic acid, polymer with 1,3-dihydro-1,3-dioxo-5-isobenzofurancarboxylic acid, 2,2'-((1-methylethylidene)bis(4,1-phenyleneoxy))bis(ethanol) and 1,1'-((1-methylethylidene)bis(4,1-phenyleneoxy))bis(2-propanol) 75214-60-7