68442-27-3 Poly(oxy(methyl-1,2-ethanediyl)), alpha-hydro-omega-hydroxy-, polymers with hydroxy-terminated polybutadiene and 1,1'-methylenebis(4-isocyanatobenzene) alpha-Hydro-omega-hydroxypoly(oxy(methyl-1,2-ethanediyl)), 1,1'-methylenebis(4-isocyanatobenzene), polyhydroxypolybutadiene polymer