英文名称:2H-Azepin-2-one, hexahydro-, polymer with 1,3-diisocyanatomethylbenzene and α-hydro-ω-hydroxypoly( oxy-1,4-butanediyl); 2H-Azepin-2-one, hexahydro-, polymer with 1,3-diisocyanatomethylbenzene and alpha-hydro-omega-hydroxypoly(oxy-1,4-butanediyl)