Polymer electrolytes and process for their production

US6096856A · kind A · utility

Assignee

• Hoechst Research & Technology Deutschland GmbH & Co. KG · DE

Inventors

• Freddy Helmer-Metzmann · Essenheim, DE
• Andreas Schleicher · Runkel, DE
• Arnold Schneller · Mainz, DE
• Helmut Witteler · Monsheim, DE

Key dates

• Filing date: Jun 24, 1998
• Grant date: Aug 1, 2000
• Expiry date: Jun 24, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P70/50
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

The invention relates to a process for the chlorosulfonation of polyarylene sulfide in which the polyarylene sulfide is completely dissolved in chlorosulfonic 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 the precipitated in an aqueous medium. The polyarylene sulfide is preferably poly-p-phenylene sulfide. The invention also relates to chlorosulfonated polyarylene sulfide produced by this process, which dissolves in a quantity of 10 to 50 wt % in N-methyl pyrrolidone and has a mean molecular weight Mw of >50,000 g/mol. Finally, the invention also relates to the use of chlorosulfonated polyarylene sulfide for the production of molding, foils, fibres or diaphragms with a proton conductivity in the 2 to 200 mS/cm range.