Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Ion-exchange polymer or process of preparing
Reexamination Certificate
2011-07-05
2011-07-05
Truong, Duc (Department: 1765)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Ion-exchange polymer or process of preparing
C521S025000, C528S501000, C430S032000, C204S192330, C427S115000
Reexamination Certificate
active
07973088
ABSTRACT:
The present invention provides a polymer electrolyte membrane with excellent proton conductivity in its thickness direction. Preferably, the polymer electrolyte membrane containing a polymer compound comprising an ionic segment having an ionic functional group and a nonionic segment having substantially no ionic functional group, and the phase containing ionic segments as a main component and the phase containing nonionic segments as a main component are phase-separated, and in the surface region thereof, the change in the amount of the ionic segment from the surface toward the interior substantially decreases monotonically.
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Ikeuchi Junichi
Nodono Mitsunori
Yamashita Yasuhiro
Sughrue & Mion, PLLC
Sumitomo Chemical Company Limited
Truong Duc
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