Chemistry of inorganic compounds – Phosphorus or compound thereof – Halogen containing
Patent
1984-10-05
1986-07-29
Doll, John
Chemistry of inorganic compounds
Phosphorus or compound thereof
Halogen containing
23293R, C01B 2510
Patent
active
046030387
ABSTRACT:
Cyclic phosphonitrilic chloride trimer suitable for polymerization to light colored, high molecular weight, linear polyphosphonitrilic chloride can be made by (1) reacting PCl.sub.5 and NH.sub.4 Cl in an inert solvent (e.g. monochlorobenzene) to form a solution of a low molecular weight linear and cyclophosphonitrilic chlorides, (2) evaporating solvent to form a concentrate, (3) adding water and cooling the mixture to precipitate cyclic trimer, (4) separation of the trimer precipitate and (5) distillation of the separated trimer.
REFERENCES:
patent: 4175113 (1979-11-01), Fieldhouse
patent: 4382914 (1983-05-01), Horie et al.
Adams, Jr. J. Robert
Juneau Matthew K.
Mitrano James R.
Doll John
Ethyl Corporation
Johnson Donald L.
Langel Wayne A.
Odenweller Joseph D.
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