Toyota Jidosha Kabushiki Kaisha

Japan Chemical Industries Co.

Kao Corporation

Shin-etsu Chemical Co., Ltd.

Kazuhito Yaeda

Shogo Kamenoue

Yasuaki Kodama

Yoichiro Yoshii

Masayuki Nagasawa

Tomoyuki Nakano

Masamine Tanikawa

Yosuke Kishino

Takato Sakurai

Kazuhiro Miyajima

Satoshi Sugiyama

Mikito Nishii

Shinichi Ogura

Hideyuki Tami

Yoshihisa Kurokawa

Yoshitaka Nakatani

Hisaki Ito

Ryota Makino

Hisanori Watanabe

A coolant composition includes a viscosity improving agent and a base. The viscosity improving agent includes at least one nonionic surfactant and at least one anionic surfactant represented by the following Formula (1) of RO&#x2014;(RO)&#x2014;SOM. The base is formed of water and/or at least one alcohol selected from the group consisting of a monohydric alcohol, a dihydric alcohol, a trihydric alcohol, and a glycol monoalkyl ether. Rrepresents a linear or branched alkyl group having 16 to 24 carbon atoms or a linear or branched alkenyl group having 16 to 24 carbon atoms, Rrepresents an ethylene group or a propylene group, m represents an average addition molar number of RO which is a number of 0.5 to 10, and M represents a cation or a hydrogen atom. A shear viscosity of the coolant composition is 8.5 mPa&#xb7;s or higher at 25&#xb0; C. and is 2.0 mPa&#xb7;s or lower at 100&#xb0; C.

Coolant composition and method of operating internal combustion engine using the same

An automotive engine coolant composition includes: a non-silicone surfactant; an anti-foaming agent containing a mineral oil and silica; and a base, in which the base includes at least one alcohol selected from the group consisting of a monohydric alcohol, a dihydric alcohol, a trihydric alcohol, and a glycol monoalkyl ether and/or water, a kinematic viscosity is 8.5 mm/s or more at 25&#xb0; C. and 2.0 mm/s or less at 100&#xb0; C., and with respect to 100 parts by mass of the coolant composition, a content of the mineral oil is 0.01 to 0.4 parts by mass and a content of the silica is 0.003 to 0.1 parts by mass.

Automotive engine coolant composition, automotive engine concentrated coolant composition, and method of operating internal combustion engine

An automotive engine coolant composition includes: a surfactant as a viscosity index improver; a rubber swelling inhibitor; and a base, in which the rubber swelling inhibitor is at least one selected from a compound expressed by a following formula (1) [in the formula, Ris hydrogen, a methyl group, or an ethyl group] and a compound expressed by a following formula (2) [in the formula, Ris hydrogen, a methyl group, or an ethyl group], the base includes at least one alcohol selected from the group consisting of a monohydric alcohol, a dihydric alcohol, a trihydric alcohol, and a glycol monoalkyl ether and/or water, a kinematic viscosity is 8.5 mm/s or more at 25&#xb0; C., and a content of the rubber swelling inhibitor is 0.03 parts by mass or more and 0.9 parts by mass or less with respect to 100 parts by mass of the coolant composition. 

A coolant composition includes: a viscosity improving agent; at least one alkali metal compound selected from the group consisting of alkali metal salts and alkali metal hydroxides; and a base composed of water and/or at least one alcohol selected from the group consisting of a monohydric alcohol, a dihydric alcohol, a trihydric alcohol, and a glycol monoalkyl ether, wherein the viscosity improving agent is a compound represented by a formula of RO&#x2014;(RO)&#x2014;SOM, where Rrepresents a linear or branched alkyl or alkenyl group having 16 to 24 carbon atoms, Rrepresents an ethylene group or a propylene group, m represents an average addition molar number of RO and a number from 0.5 to 10, and M represents a cation or a hydrogen atom, and a kinetic viscosity of the coolant composition is 8.5 mm/sec or higher at 25&#xb0; C. and is 2.0 mm/sec or lower at 100&#xb0; C.

Coolant composition, method of operating internal combustion engine using the same, and use of the same

A coolant used for cooling down a stack of fuel cells includes: a solution mixture of water and a glycol as base material; and a rust-preventive additive that functions to keep an electric conductivity of the coolant at a low level and to maintain a hydrogen ion exponent of the coolant in a substantially neutral level. The rust-preventive agent includes at least one of an alkaline ethanolamine additive, such as triethanolamine, diethanolamine, or monoethanolamine, and an acidic additive selected among the group consisting of triazole compounds, phosphoric acid compounds, and organophosphoric acid compounds.

Coolant, method of enclosing coolant, and cooling system

A liquid coolant composition with improved anti-corrosive property contains 85-99 weight % of an agent for lowering the melting point selected from the group consisting of alcohols and glycol, and 1-15 weight % of a rust preventive composition. The rust preventive composition contains 0.00005-0.02 weight % at elemental metal concentration of calcium compounds or a mixture of 0.00005-0.02 weight % each of calcium and magnesium compounds, and at least one kind of rust preventive selected from the group consisting of phosphates, borates, nitrates, molybdates, benzoates, silicates, triazoles, thiazoles, sebacic acid and octylic acid. Still better results are obtained if 0.001-0.02 weight % of at least one kind of polyphosphoric or polycarboxylic acids is additionally contained.

Liquid coolant compositions with anti-corrosive property containing

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Shizuoka, Japan

Kazuhito Yaeda