C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
C08J 5/22 (2006.01) B01D 69/02 (2006.01) B01D 69/12 (2006.01) B01D 71/28 (2006.01) B01D 71/32 (2006.01) G01N 27/40 (2006.01) H01M 2/16 (2006.01) H01M 8/10 (2006.01)
Patent
CA 2240495
A composite membrane is provided in which a porous substrate is impregnated with a polymeric composition comprising various combinations of .alpha.,.beta.,.beta.-trifluorostyrene, substituted .alpha.,.beta.,.beta.- trifluorostyrene and ethylene-based monomeric units. Where the polymeric composition includes ion-exchange moieties, the resultant composite membranes are useful in electrochemical applications, particularly as membrane electrolytes in electrochemical fuel cells.
L'invention concerne une membrane composite dans laquelle un substrat poreux est imprégné d'une composition polymère contenant diverses combinaisons de .alpha.,.beta.,.beta.-trifluorostyrène, de .alpha.,.beta.,.beta.-trifluorostyrène substitué et d'unités monomères à base d'éthylène. Quand la composition polymère comporte des groupes échangeurs d'ions, les membranes composites obtenues sont utiles dans des applications électrochimiques, notamment comme électrolytes à membrane dans les cellules électrochimiques.
Steck Alfred E.
Stone Charles
Ballard Power Systems Inc.
Bdf Ip Holdings Ltd.
Borden Ladner Gervais Llp
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