Phosphonitrilic chloride polymers

Details Phosphonitrilic chloride polymers Phosphonitrilic chloride polymers

C - Chemistry, Metallurgy

01

B

23/77

C01B 21/098 (2006.01)

Patent

CA 1169629

Case 4901 PHOSPHONITRILIC CHLORIDE POLYMERS Abstract of the Disclosure Linear phosphonitrilic chloride polymers are produced from linear phosphonitrilic chloride oligomers by means of a two-step process. In the first step a mixture of linear phosphonitrilic chloride oligomer having an average degree of polymerization of at least 4 is heated with an excess of ammonia or ammonium chloride. Cyclic phosphonitrilic chloride oligomer formed during the course of the first step is removed from the reaction mixture. After the removal of the cyclic oligomer the reaction mixture is subjected to the second step which involves heating the mixture in an inert liquid solvent (optionally in the presence of ammonia or ammonium chloride) whereby the molecular weight of the linear phosphonitrilic chloride polymer is increased.

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