process for polymerization cyclischer oligomerer formula (npcl amp; amp; darr; 2 amp; amp; darr;) amp; amp; darr; n amp; amp; darr;

摘要

METAL SALT CATALYZEDPOLYMERIZATION OF (NPCl2) OLIGOMERSAbstract of the DisclosureA process for producing benzene-soluble substantiallylinear dichlorophosphazene polymer having the formula (NPCl2)x,in which x is greater than 20 and may be as high as 50,000 orhigher, from a cyclic oligomer having the formula (NPCl2)n,in which n is from 3 to 9, particularly the trimer (NPCl2)3or tetramer (NPCl2)4, in the presence of a small but significantamount of an inorganic salt, preferably a halide of a metalsuch as Cr, Ni, Co, Cu, Fe, Mn or Mg which affords controlof the molecular weight and avoids the formation of largeamounts of gel.