Patent · US Active

Method for mechanical stabilization of nitrogen-containing polymers

US8461296B2 · kind B2 · utility

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16Claims

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Assignee

BASF SE

Inventors

Friederike Fleischhaker · Ludwigshafen, DE
Oliver Gronwald · Frankfurt, DE
Jörg Belack · Mainz, DE

Key dates

Filing date	Mar 23, 2012
Grant date	Jun 11, 2013
Priority date	—
Expiry date	Mar 23, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P70/50
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to a process for preparing mechanically stabilized polyazole polymers. The process includes the steps of: a) producing a film comprising polyazoles with at least one amino group in a repeat unit, b) treating the film from step a) with a solution comprising (i) at least one acid and (ii) at least one stabilizing reagent, and c) performing the stabilization reaction in the membrane obtained in step directly or in a subsequent membrane processing step by heating to a temperature greater than 60° C. The stabilizing reagent contains at least one compound which has at least one aldehyde group and at least one hydroxyl group; or at least one hemiacetal group; or at least one acetal group. These polyazole polymer membranes have a high conductivity and a good mechanical stability and are suitable for applications in fuel cells.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.