1,3-Isobenzofurandione, 5,5′-oxybis-, polymer with 4,4′-[1,4-phenylenebis(1-methylethylidene)]bis[benzenamine] 4,4′-[1,4-Phenylenebis(1-methylethylidene)]bisaniline-4,4′-oxydiphthalic dianhydride copolymer 4,4′-Oxydiphthalic anhydride-4,4′-(1,4-phenylenebis(1-methylethylidene))bisbenzenamine copolymer 4,4′-Oxydiphthalic anhydride-4,4′-(p-phenylenediisopropylidene)dianiline copolymer Benzenamine, 4,4′-[1,4-phenylenebis(1-methylethylidene)]bis-, polymer with 5,5′-oxybis[1,3-isobenzofurandione] Bisaniline p-4,4′-oxydiphthalic anhydride copolymer