| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sulfonated polymer capable of exhibiting excellent hot-water resistance and excellent mechanical properties even when the amount of sulfo groups introduced thereinto is high, to provide a monomer for obtaining the polymer, to provide a solid polyelectrolyte comprising the sulfonated polymer and having a proton conductivity and excellent electricity generation performance, and to provide a proton-conductive film. <P>SOLUTION: The aromatic sulfonic acid derivative is represented by formula (A) (wherein X is a halogen atom, -OSO<SB>2</SB>CH<SB>3</SB>or -OSO<SB>2</SB>CF<SB>3</SB>; and R is a hydrogen atom, an alkali metal atom, an alkaline earth metal atom, or a 1 to 20C hydrocarbon group). <P>COPYRIGHT: (C)2007,JPO&INPIT |
