Shishiai-kabushikigaisha

Other

Honda Motor Co., Ltd.

Honda R&d Co., Ltd.

Michihiro Hori

Hiroshi Egawa

Mitsuru Osawa

Hidemi Kado

Yoshiyuki Morita

Takashi Nagashima

Yasuaki Mori

Shiro Yagawa

Tsuyumi Takashiba

Ayako Omori

Shiro c/o Honda R&D Co Ltd Yagawa

Tsuyumi c/o Honda R&D Co Ltd Takashiba

The present invention relates to a coolant composition for fuel cell coolant, comprised of sulfur containing alcohol or sulfur containing phenol having at least one sulfur atom per molecule, which effectively prevents increase of electric conductivity due to oxidation of its base component for a long time. The coolant composition when diluted with water to a predetermined concentration effectively suppresses increase of electric conductivity of the coolant and maintain fluctuation of electric conductivity within the range from 0 to 10 &#x3bc;S/cm so that power generation efficiency of the fuel cell may not be lowered.

Coolant composition for fuel cell

An antifreeze/coolant composition, comprising a) a base material such as water, alcohol, glycol and glycol ether; b) a fluorine compound and c) an inorganic acid.

Antifreeze/coolant composition

A glycol-based coolant composition which provides an excellent metal corrosion inhibition despite its low phosphorus content is disclosed. The glycol-based coolant composition contains: (A) 0.1-5.0% by weight of at least one ingredient selected from group A&prime; consisting of C6-C12 aliphatic dibasic acids and their alkali metal salts; (B) 0.1-10% by weight of at least one ingredient selected from group B&prime; consisting of alkyl benzoic acids and their alkali metal salts; (C) 0.001-0.1% by weight of at least one ingredient selected from group C&prime; consisting of strontium compounds and their alkali metal salts; and (D) 0.1-0.3% by weight of at least one ingredient selected from group D&prime; consisting of phosphoric acids and their alkali metal salts.

Low P type coolant composition

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Gifu, Japan

Michihiro Hori