1,2-Ethanediol, alpha-hydro-omega-hydroxypoly(oxy-1,4-butanediyl), 1,1'-methylenebis(4-isocyanatobenzene) and 2-oxepanone polymer 2-Oxepanone, polymer with 1,2-ethanediol, alpha-hydro-omega-hydroxypoly(oxy-1,4-butanediyl) and 1,1'-methylenebis(4-isocyanatobenzene) 72928-64-4