68081-93-6 Poly(oxy(methyl-1,2-ethanediyl)), alpha-hydro-omega-hydroxy-, polymer with 1,1'-methylenebis(4-isocyanatobenzene), isocyanate-terminated Poly(oxypropylene)glycol, 4,4-methylenediphenyl diisocyanate copolymer 4,4'-methylenediphenyl diisocyanate terminated