The chlorine in the hexachlorocyclotriphosphazene molecule are substituted by phenoxy or aminoethyloxy
and tetraphenoxydiaminoethyloxycyclotriphosphazene has been obtained. This derivative then reacts with toluenediisocyanate to produce a type of functional macromolecule material. A novel process for making hexachlorocyclotriphosphazene into functional macromolecule materials is described.