| US 7,332,530 B2 | ||
| Proton-conducting polymer membrane comprising a polymer with sulphonic acid groups and use thereof in fuel cells | ||
| Joachim Kiefer, Losheim am See (Germany); Oemer Uensal, Mainz (Germany); and Gordon Calundann, North Plainfield, N.J. (US) | ||
| Assigned to Celanese Ventures GmbH, Frankfurt am Main (Germany) | ||
| Appl. No. 10/523,373 PCT Filed Jul. 31, 2003, PCT No. PCT/EP03/08462 § 371(c)(1), (2), (4) Date Mar. 23, 2005, PCT Pub. No. WO2004/015803, PCT Pub. Date Feb. 19, 2004. |
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| Claims priority of application No. 102 35 356 (DE), filed on Aug. 02, 2002; and application No. 102 35 357 (DE), filed on Aug. 02, 2002. | ||
| Prior Publication US 2005/0244695 A1, Nov. 03, 2005 | ||
| Int. Cl. C08J 5/22 (2006.01); H01M 8/10 (2006.01) | ||
| U.S. Cl. 521—27 [521/30; 429/30; 429/33; 526/286] | 28 Claims |
| 1. A proton-conducting polymer membrane comprising polymers containing sulfonic acid groups, prepared by a process comprising
the steps of
A) mixing (i) vinyl-containing sulfonic acid with (ii) one or more aromatic tetraamino compounds and with one or more aromatic
carboxylic acids, their esters, their acid halides or their acid anhydrides said carboxylic acids, their esters, their acid
halides or their acid anhydrides containing at least two carboxylic groups per carboxylic monomer, containing at least two
acid groups per carboxylic acid monomer, or mixing (i) vinyl-containing sulfonic acid with (ii) one or more aromatic or heteroaromatic
diaminocarboxylic acids, their esters, their acid halides or their acid anhydrides,
B) heating the mixture prepared according to step a) under inert gas to temperatures of up to 350° C., to form polyazole polymers,
C) applying a layer to a support, using the mixture according to step a) or step b),
D) polymerizing the vinyl-containing sulfonic acid present in the sheetlike structure prepared according to step c).
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