Kyodo Yushi Co., Ltd.

Denso Corporation

Nsk Corporation

Nidec Corporation

Denso Corpora Tion

Iwaki Hirooka

Yuta Sato

Takeshi Yamamoto

Takayuki Oe

Yutaka Imai

Terasu Yoshinari

Haruhiko Kiyota

Kyoji Inukai

Tomonobu Komoriya

Masashi Tobayama

Shozo Ikejima

Masataka Muto

Ryosuke Saito

Michita Hokao

Ryosuke Ichimura

Shigeyuki Mori

Kazuki Isa

Yoshinori Fukushima

Yuji Hagiwara

Kyosuke Ikuma

Hiromasa Tanaka

Masatoshi Ijima

Sayuri Tsubata

Satoru Nakazawa

Yosuke Takao

Takashi Takizawa

Yosuke Endo

Yusuke Asada

Akihiko Urashima

Toshizo Watanabe

The present invention provides a grease composition comprising (a) a base oil, (b) a thickener comprising a urea compound, (c) an amine antioxidant at 0.5 to 5% by mass based on a total mass of the composition, and (d) a quinoline antioxidant at 0.5 to 5% by mass based on the total mass of the composition.

Grease composition

A grease composition comprises a thickener, a base oil, and a friction modifier. The friction modifier comprises: at least one selected from the group consisting of fatty acids, fatty acid metal salts, phosphate esters, thiophosphate esters, and zinc dithiophosphates; and a polyhydric alcohol ester.

The invention provides a grease composition for lubricating resins which contains a base oil, a diurea compound represented by formula (I) as a thickener: R&#x2014;NHCONH&#x2014;R&#x2014;NHCONH&#x2014;R(I) (wherein Rrepresents a bivalent aromatic hydrocarbon group having 6 to 15 carbon atoms, and Rand Reach independently represent a straight-chain or branched alkyl group having 8 to 22 carbon atoms), and a chained hydrocarbon polymer having a weight-average molecular weight of 20,000 to 300,000.

Grease composition for lubricating resins and electric power steering device

Provided is a grease composition for a magnet clutch of an automobile, including: a base oil; and a thickener, wherein the composition contains 5% by mass or more of a sulfur content in terms of sulfur element relative to a total mass of the composition.

The invention provides a lubricating oil for fluid dynamic bearing including as a base oil a monoester oil free of unsaturated bond, and having an absolute viscosity of 2.0 to 3.0 mPa&#xb7;s at 100&#xb0; C. a viscosity index of 130 or more and a pour point of &#x2212;20&#xb0; C. or less.

Lubricating oil for fluid dynamic bearing and spindle motor equipped with the lubricating oil

The invention provides a grease composition containing a base oil, a thickener, and an anti-flaking additive such as a compound represented by, for example, formula (1-1), which grease composition can prevent the white layer flaking of the rolling bearings. (In the formula, R1 and R4 are each independently a straight-chain or branched alkyl or alkenyl group having 1 to 20 carbon atoms.) 

A grease composition having a thickener, a base oil containing a hydrocarbon oil, and a polymer alloy of an olefin copolymer and a styrene-based copolymer is disclosed.

Grease composition comprising polymer alloy, a structure part enclosing the same and a method for producing the grease composition

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Fujisawa, Japan

Iwaki Hirooka