Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Ho-Jin Kweon0
Hyoung-Juhn Kim0
Sung-Yong Cho0
Yeong-Chan Eun0
Date of Patent
June 17, 2008
Patent Application Number
10972421
Date Filed
October 26, 2004
Patent Primary Examiner
Patent abstract
A method for preparing poly(2,5-benzimidazole) whereby 3,4-diaminobenzoic acid is polymerized using a dehydrating reagent containing P2O5 and CX3SO3H where X is H or F. The poly(2,5-benzimidazole) has good proton conductivity and low methanol permeability, and therefore can be used as a polymer electrolyte membrane for a fuel cell.
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