Polymer comprising terminal sulfonic acid group, and polymer...

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

Reexamination Certificate

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Details

C525S359300, C525S384000, C525S419000, C525S420000

Reexamination Certificate

active

07378471

ABSTRACT:
The present invention is related to a polymer comprising terminal sulfonic acid groups, which has a high ionic conductivity and good structural stability, does not decompose even under low humidity conditions, and is inexpensive to produce. Furthermore, the present invention is related to a polymer electrolyte and a fuel cell using the same. The polymer of the present invention has a substituent comprising a terminal sulfonic acid group comprising Formula (1) at a side chain:where n may be a number in the range of about 1 to about 5.

REFERENCES:
patent: 5438082 (1995-08-01), Helmer-Metzmann et al.
patent: 5852128 (1998-12-01), Padmanaban et al.
patent: 6033828 (2000-03-01), Shimada et al.
patent: 6194474 (2001-02-01), Kerres et al.
patent: 6210859 (2001-04-01), Jeon et al.
patent: 6759483 (2004-07-01), Sheehan et al.
patent: 2002/0188097 (2002-12-01), Goto et al.

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