Atochem

Institut Mondial Du Phosphate

Societe Nationale Elf Aquitaine

Roger De Jaeger

Philippe Potin

Guy Pagniez

Emile Puskaric

Moncef Helioui

Jean-Paul Chambrette

Ghislaine D'Halluin

Taher Abou Chakra

The molecular weights of the poly(dichlorophosphazenes), and of the poly(organophosphazenes) produced therefrom, are controlledly regulated by heating such poly(dichlorophosphazenes) in the presence of an effective molecular weight-regulating amount of phosphorus oxychloride.

Poly(dichlorophosphazenes)/poly(organophosphazenes) having regulated

The polycondensation disrupting effects of the impurities in an impure N-dichlorophosphoryltrichlorophosphazene, P.sub.2 NOCl.sub.5, or oligomer thereof, are avoided by polycondensing such impure P.sub.2 NOCl.sub.5 into a high molecular weight uncrosslinked poly(dichlorophosphazene) in the presence of an effective impurity-inhibiting, polymerization-controlling amount of phosphorous pentachloride, PCl.sub.5.

Polycondensation of impure P.sub.2 NOCl.sub.5 into uncrosslinked

Polychlorophosphazene [Cl.sub.2 (O)P[NPCl.sub.2 ].sub.n Cl] is more rapidly produced by polycondensing N-(dichlorophosphoryl)-trichlorophosphazene [P.sub.2 NOCl.sub.5 ] in the presence of a catalytically effective amount of a tertiary amine.

Preparation of polychlorophosphazene

Linear polychlorophosphazenes having a dichlorothiophosphoryl terminal group and corresponding to the formula

Linear polychlorophosphazenes possessing a dichlorothiophosphoryl

The present invention relates to novel polychlorophosphazenes and to the process for their preparation. These polychlorophosphazenes of the general formula:

Growing community of inventors

Chereng, France

Roger De Jaeger