68609-81-4 Isocyanic acid, polymethylenepolyphenylene ester, polymer with alpha,alpha',alpha''-1,2,3-propanetriyltris(omega-hydroxypoly(oxy(methyl-1,2-ethanediyl))), isocyanate-terminated Poly(oxypropylene)glycerol, poly(methylene phenylene isocyanate) polymer, isocyanate terminated