Shishiai-kabushikigaisha

Honda Motor Co., Ltd.

Honda R&d Co., Ltd.

Hiroshi Egawa

Shiro Yagawa

Nobuyuki Kaga

Michihiro Hori

Hidemi Kado

Tsuyumi Takashiba

Yoshiyuki Morita

Mitsuru Osawa

Ayako Omori

Shiro c/o Honda R&D Co Ltd Yagawa

Tsuyumi c/o Honda R&D Co Ltd Takashiba

A coolant composition for a fuel cell unit, which contains at least one aliphatic alcohol having unsaturated bonds in the molecules having 2 to 20 carbon atoms each. The coolant composition maintains the electrical conductivity of the coolant at 10 &#x3bc;S/cm or below as well as the fluctuation of the electrical conductivity within the range of 0 to 10 &#x3bc;S/cm.

Cooling liquid composition for fuel cell

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

The present invention provides a coolant composition having a glycol as a main component, which prevents iron and aluminum from being corroded, and in particular, has excellent corrosion preventing properties for aluminum and aluminum alloys at high temperatures, and the coolant composition is characterized by containing: (a) 0.1-10 % by weight of at least one component selected from among aromatic monobasic acids and the salts thereof; (b) 0.0001-0.1 % by weight of at least one component selected from among strontium compounds, magnesium compounds and calcium compounds; and (c) 0.01-1.0 % by weight of 2-phosphonobutane-1,2,4-tricarboxylic acid or the salt thereof.

Coolant composition and methods of use thereof

Growing community of inventors

Gifu, Japan

Hiroshi Egawa