Metal salt catalyzed polymerization of (NPCl.sub.2) oligomers

Details Metal salt catalyzed polymerization of (NPCl.sub.2) oligomers Metal salt catalyzed polymerization of (NPCl.sub.2) oligomers

1978-02-09

1979-01-30

Vertiz, O. R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Halogen containing

C01B 2510

Patent

active

041373308

ABSTRACT:
A process for producing benzene-soluble substantially linear dichlorophosphazene polymer having the formula (NPCl.sub.2).sub.x, in which x is greater than 20 and may be as high as 50,000 or higher, from a cyclic oligomer having the formula (NPCl.sub.2).sub.n, in which n is from 3 to 9, particularly the trimer (NPCl.sub.2).sub.3 or tetramer (NPCl.sub.2).sub.4, in the presence of a small but significant amount of an inorganic salt, preferably a halide of a metal such as Cr, Ni, Co, Cu, Fe, Mn or Mg which affords control of the molecular weight and avoids the formation of large amounts of gel.

REFERENCES:
patent: 3026174 (1962-03-01), Paddock
patent: 3370020 (1968-02-01), Allcock et al.
patent: 3937790 (1976-02-01), Allcock et al.

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