The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 20, 2006
Filed:
Sep. 03, 2001
Yoichi Kawano, Fukuoka, JP;
Takayuki Kawarada, Fukuoka, JP;
Hiroshi Ono, Fukuoka, JP;
Abstract
This invention relates to a fuel cell separator of excellent electrical conductivity, gas impermeability and strength. The composition for a fuel cell separator of this invention comprises a resin binder with a viscosity of 0.01–0.5 Pa·s at 150° C. and a viscosity of 3 Pa·s or more at 25° C. and graphite particles at a weight ratio of 1:(5–15) and a curing accelerator. The resin binder is exemplified by an epoxy resin binder composed of an epoxy resin and a curing agent for the epoxy resin. The process for producing the fuel cell separator of this invention is practiced by kneading and molding the aforementioned composition for a fuel cell separator and curing above the curing temperature of the composition. The fuel cell separator of this invention to be obtained by the aforementioned process shows a bulk density of 1.90 g/cmor more, a sheet resistance (areal pressure, 0.5 MPa) of 40 m Ωcmor less, a gas permeability of 1×10cmor less and a flexural strength of 30 MPa or more.