To provide a coating material for a fuel cell separator, capable of forming an electroconductive coating film having proper corrosion resistance, electrical conductivity, and strong adherence.
In the coating material for the fuel cell separator forming the electroconductive coating film, by using graphite as an electroconductive material and applying on the surface of a metallic or carbon separator for the fuel cell, 5 wt.% or higher one among the emulsions of styrene-butadine copolymer, acrylic-styrene copolymer, and acylic-silicone copolymer is contained as a binder for the coating material, a solvent having solubility with the binder is used as a medium, the mixing ratio of the electroconductive material and the binder is set at 20:80 to 95:5, and the solid content in the coating material is set at 10-60 wt.%.
COPYRIGHT: (C)2008,JPO&INPIT
Minoru Shirahige
JP2000058083A |
WO2003044888A1 |