英文名称:2H-Azepin-2-one, hexahydro-, polymer with 2-(2-ethoxyethoxy)ethanol, 2-ethyl-2-(hydroxymethyl)-1,3-propanediol and 1,1-methylenebis(4-isocyanatobenzene); 2H-Azepin-2-one, hexahydro-, polymer with 2-(2-ethoxyethoxy)ethanol, 2-ethyl-2-(hydroxymethyl)-1,3-propanediol and 1,1’-methylenebis[4-isocyanatobenzene]