USA as Represented by Secretary of the Navy

Bechtel Bwxt Idaho, Lcc

Christopher W Allen

Eric S Peterson

Azzam S Hneihen

Randall Bright

Kolikkara Ramachandran

Jonathan C Shaw

A method for making poly(dichlorophosphazene) using solid state reactants is disclosed and described. The present invention improves upon previous methods by removing the need for chlorinated hydrocarbon solvents, eliminating complicated equipment and simplifying the overall process by providing a &ldquo;single pot&rdquo; two step reaction sequence. This may be accomplished by the condensation reaction of raw materials in the melt phase of the reactants and in the absence of an environmentally damaging solvent.

Solid state synthesis of poly(dichlorophosphazene)

The reaction of the lithium enolate of acetaldehyde, LiOCHCH.sub.2, with achlorocyclotriphosphazene, N.sub.3 P.sub.3 Cl.sub.6, lead to the series of (vinyloxy)chlorocyclotriphosphazenes, N.sub.3 P.sub.3 Cl.sub.6-n (OCH.dbd.CH.sub.2).sub.n (n=1-6). The nongeminal pathway is favored. These materials undergo homopolymerization reaction and can be copolymerized with a wide variety of organic monomers. The resulting polymeric systems incorporate certain properties such as fire retardancy and are chemically bonded to the polymer rather than an additive.

(Vinyloxy)chlorocyclotriphosphazenes

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Essex Junction, VT, United States of America

Christopher W Allen