Polymeric electrolytes and process for their preparation

Details Polymeric electrolytes and process for their preparation Polymeric electrolytes and process for their preparation

C - Chemistry, Metallurgy

08

G

C08G 75/02 (2006.01) C08L 81/02 (2006.01) H01G 9/02 (2006.01) H01M 2/16 (2006.01) H01M 8/02 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2227835

The invention relates to a process for the chlorosulphonation of polyarylene sulphide in which the polyarylene sulphide is completely dissolved in chlorosulphonic acid at a temperature of -10 to +20 °C, then agitated at reaction temperatures in the +5 to +20 °C range for a reaction time of 180 min at the most, possibly with the addition of oleum or acetic anhydride and then precipitated in an aqueous medium. The polyarylene sulphide is preferably poly-p-phenylene sulphide. The invention also relates to chlorosulphonated polyarylene sulphide produced by this process, which dissolves in a quantity of 10 to 50 wt.% in N- methyl pyrrolidone and has a mean molecular weight M w of >= 50,000 g/mol. Finally, the invention also relates to the use of chlorosulphonated polyarylene sulphide for the production of moulding, foils, fibres or diaphragms with a proton conductivity in the 2 to 200 mS/cm range.

L'invention concerne un procédé de chlorosulfonation de sulfure de polyarylène, selon lequel le sulfure de polyarylène est entièrement dissous à une température comprise entre -10 et +20 DEG C, dans de l'acide chlorosulfonique, puis est agité à des températures de réaction comprises entre +5 et +20 DEG C, pendant un temps de réaction ne dépassant pas 180 mn, éventuellement avec adjonction d'oléum ou d'anhydride acétique, avant d'être précipité dans une substance aqueuse. Le sulfure de polyarylène utilisé est de préférence du poly-p-sulfure de phénylène. L'invention concerne en outre un sulfure de polyarylène chlorosulfoné produit selon ledit procédé, pouvant être dissous dans de la N-méthyle-pyrrolidone, dans un volume de 10 à 50 % en poids et présentant un poids moléculaire moyen Mw >/= 50 000 g/mol. L'invention concerne également l'utilisation de sulfure de polyarylène chlorosulfoné pour produire des corps moulés, des pellicules, des fibres ou des membranes ayant une aptitude à la conduction protonique comprise entre 2 à 200 mS/cm.

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