1,3-Isobenzofurandione, polymer with 1,4-butanediol, 1,6-diisocyanatohexane, 1,2-ethanediamine and 1,6-hexanediol 67815-80-9 Phthalic anhydride, 1,6-hexanediol, 1,6-hexamethylenediisocyanate, 1,4-butanediol, ethylenediamine polymer