39381-34-5 39387-96-7 Hexanedioic acid, polymer with butanediol, 1,2-ethanediol and 1,1'-methylenebis(4-isocyanatobenzene) Hexanedioic acid, polymer with butanediol, 1,2-ethanediol, and 1,1'-methylenebis(4-isocyanatobenzene)