2-Oxepanone, polymer with alpha-hydro-omega-hydroxypoly(oxy-1,4-butanediyl), 4,4'-methylenebis(cyclohexanamine) and 1,1'-methylenebis(4-isocyanatocyclohexane) 72928-65-5 Poly(oxy-1,4-butanediyl), alpha-hydro-omega-hydroxy-, 4,4'-methylenebis(cyclohexanamine), 1,1'-methylenebis(4-isocyanatocyclohexane), 2-oxepanone polymer