| US 7,540,984 B2 | ||
| Proton-conducting membrane and the use thereof | ||
| Gordon Calundann, North Plainfield, N.J. (US); Michael J. Sansone, Berkeley Heights, N.J. (US); Oemer Uensal, Mainz (Germany); and Joachim Kiefer, Losheim am See (Germany) | ||
| Assigned to BASF Fuel Cell GmbH, (Germany) | ||
| Filed on Oct. 31, 2007, as Appl. No. 11/930,704. | ||
| Application 11/930704 is a division of application No. 10/472814, granted, now 7,384,552, previously published as PCT/EP02/03900, filed on Apr. 09, 2002. | ||
| Claims priority of application No. 101 17 686 (DE), filed on Apr. 09, 2001. | ||
| Prior Publication US 2008/0050514 A1, Feb. 28, 2008 | ||
| Int. Cl. B29C 65/00 (2006.01); B05D 5/00 (2006.01); B01D 39/00 (2006.01); B01D 39/14 (2006.01) | ||
| U.S. Cl. 264—41 [427/244; 210/500.39; 521/27; 204/296] | 25 Claims |
| 1. A process for preparing a membrane which comprises process (1) or process (2),
wherein the process of (1) comprises
A1) 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,
B1) application of a layer to a support using the mixture from step A1),
C1) heating of the flat structure/layer obtained as described in step B1) to temperatures of up to 350° C. under inert gas
to form the polyazole polymer,
D1) treating the membrane formed in step C1) by hydrolysis until it is self-supporting,
or wherein the process of (2) comprises
A2) 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,
B2) heating of the mixture in step A2) to temperatures of up to 350° C. under inert gas to form the polyazole polymer,
C2) application of a layer to a support using the polymer from step B2),
D2) treating the membrane formed in step C2) by hydrolysis until it is self-supporting.
|