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US 8,273,277 B2Granted
Process for producing a proton-conducting, polyazole-containing membrane
AssigneeBASF Fuel Cell GmbH
InventorsOemer Uensal, Mathias Weber, Gunter Christ, Christian Dörr, Daniel Walczyk, Tequila Harris
Life of this patent
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Abstract
A method for producing a proton-conducting, polyazole-containing membrane, in which A) a composition containing polyphosphoric acid and at least one polyazole and exhibiting a solution viscosity in the range from 10 Pa·s to 1000 Pa·s, measured to DIN 53018 at the temperature at the orifice during production of the membrane, is pressed through an orifice at a temperature in the range from 25° C. to 300° C., and B) the composition is then solidified.
Claims16
A method for producing a proton-conducting, polyazole-containing membrane which comprises
- A) extruding a composition containing 70 wt. % to 99.5 wt. % of polyphosphoric acid and 0.5 wt, % to 30 wt. % of at least one polyazole through a slot, said composition and exhibiting a solution viscosity in the range from 10 Pas to 1000 Pa·s, measured to DIN 53018 at the temperature at the slot, said temperature being in the range from 120° C. to 300° C. during production of the membrane, and
- B) solidifying the composition through cooling and/or hydrolysis and/or cross-linking.
Dependencies are inferred from the claim text.