Patent ID: 7384552
Filing Date: 2008-06-10
Classification: B01D,C08G,C08J,C09D,H01M,Y02E,Y02P

Abstract:
1. A proton-conducting polymer membrane based on polyazoles which is obtained by a process comprising the steps A) Mixing of one or more aromatic tetraamino compounds with one or more aromatic carboxylic acids or esters thereof which contain at least two acid groups per carboxylic acid monomer, or mixing of one or more aromatic and/or heteroaromatic diaminocarboxylic acids, in polyphosphoric acid to form a solution and/or dispersion, B) Application of a layer to a support using the mixture from step A), C) Heating of the flat structure/layer obtained as described in step B) to temperatures of up to 350° C. under inert gas to form the polyazole polymer, D) Treating the polyazole polymer formed in step C) by hydrolysis until it is self-supporting.