4,4'-Methylenediphenyl diisocyanate, oligomeric reaction products with 2,4'-diisocyanatodiphenylmethane, 1,1'-methylenebis(4-isocyanatobenzene) homopolymer, oxydipropanol and alpha,alpha',alpha''-1,2,3-propanetriyltris[omega-hydroxypoly[oxy(methyl-1,2-eth