Process for the production of linear polyphosphazenes

Details Process for the production of linear polyphosphazenes Process for the production of linear polyphosphazenes

1987-11-16

1989-02-21

Doll, John

Chemistry of inorganic compounds

Phosphorus or compound thereof

Halogen containing

528399, C01B 2510

Patent

active

048063223

ABSTRACT:
The present invention relates to a method of preparing linear polyphosphazene polymers by direct synthesis under anhydrous conditions from NH.sub.4 Cl and at least one chlorophosporous compound selected from the group consisting of PCl.sub.5, XPCl.sub.4, or X.sub.2 PCl.sub.3 wherein X is one or more substituents selected from the group consisting of C.sub.6 H.sub.5 -, C.sub.6 H.sub.4 Cl-, C.sub.6 H.sub.4 F-, C.sub.6 H.sub.4 Br-, C.sub.6 H.sub.2 Cl.sub.3 -, C.sub.6 F.sub.5 -, C.sub.6 H.sub.4 CF.sub.3 -, C.sub.6 H.sub.4 NO.sub.2 -, Cl.sub.3 C-, F.sub.3 C-, F.sub.5 C.sub.2 -, F.sub.7 C.sub.3 -, or HC.sub.2 F.sub.4 -. Each of these compounds may be prepared in situ in a reactor. The instant process controls the pressure in the reactor through continuous venting of by-product HCl at elevated pressures. The instant invention also utilizes an excess of of reactive solvent such as PCl.sub.3, XPCl.sub.2, or X.sub.2 PCl as X is defined above.

REFERENCES:
patent: 3669633 (1972-06-01), Beinfest et al.
patent: 3860693 (1975-01-01), Graham
patent: 4225567 (1980-09-01), Halasa et al.
patent: 4242494 (1980-12-01), Hergenrother et al.
patent: 4327064 (1982-04-01), Fieldhouse et al.
patent: 4551317 (1985-11-01), Li
Allen, G., et al, Polymer, 11, No. 1, pp. 31-43 (Jan. 1970).

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