A process for the catalytic synthesis of polyphosphazenes

Details A process for the catalytic synthesis of polyphosphazenes A process for the catalytic synthesis of polyphosphazenes

1989-08-01

1990-08-07

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phosphorus-containing reactant

C08G 7902

Patent

active

049469380

ABSTRACT:
The present invention relates to an improved process for the synthesis of polyphosphazenes in which catalytic amounts of a compound selected from the group consisting of toluenesulfonic acid, sulfabenzoic acid, ammonium sulfamate and sulfamic acid, and preferably an effective amount of a promoter compound selected from the group consisting of CaSO.sub.4.2H.sub.2 O, CuSO.sub.4.2H.sub.2 O, NiSO.sub.4.2H.sub.2 O, CoSO.sub.4.2H.sub.2 O, MgSO.sub.4.2H.sub.2 O and Al(OH).sub.3, are added to a reaction mixture of hexachlorocyclotriphosphazene and 1,2,4-trichlorobenzene.

REFERENCES:
patent: 4242316 (1980-12-01), Sinclair
patent: 4440921 (1984-04-01), Allcock et al.
patent: 4523009 (1985-06-01), Neilson et al.

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