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

C - Chemistry, Metallurgy

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C01B 25/10 (2006.01) C01B 21/097 (2006.01) C01B 21/098 (2006.01)

Patent

CA 1109636

METAL SALT CATALYZED POLYMERIZATION OF (NPCl2) OLIGOMERS Abstract of the Disclosure A process for producing benzene-soluble substantially linear dichlorophosphazene polymer having the formula (NPCl2)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 (NPCl2)n, in which n is from 3 to 9, particularly the trimer (NPCl2)3 or tetramer (NPCl2)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.

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