英文名称:2-Oxepanone, polymer with 2-ethyl-2-(hydroxymethyl)-1,3-propanediol, 1,1-methylenebis4-isocyanatocyclohexane and 2,2-oxybisethanol; 2-Oxepanone, polymer with 2-ethyl-2-(hydroxymethyl)-1,3-propanediol, 1,1'-methylenebis(4-isocyanatocyclohexane) and 2,2'-oxybis(ethanol)