Patent ID: 7049021

Claim:
A conductive composition for a polymer electrolyte fuel cell separator comprising: 1) a conductive component composed of non-fine graphite particles and fine graphite particles; and 2) a thermoplastic resin and/or a thermosetting resin, 3) the non-fine graphite particles having an average particle diameter D 1 of 55 to 65 μm, 4) the melt viscosity being 1×10 2 to 5×10 3 Pa·s at 320° C., 5) the weight ratio of (the non-fine graphite particles and the fine graphite particles)/(the thermoplastic resin and/or the thermosetting resin) being from 95/5 to 75/25, 6) the fine graphite particles having an average particle diameter 5.5–32.5 μm, and 7) the weight ratio of the non-fine graphite particles to the fine graphite particles being 95/5 to 75/25.