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US 10,844,309 B2Granted
Grease composition
AssigneesKyodo Yushi Co., Ltd., Denso Corporation
InventorsShozo Ikejima, Iwaki Hirooka, Yutaka Imai, Ryosuke Ichimura, Kazuki Isa, Yusuke Asada, Kyoji Inukai, Hiromasa Tanaka, Masashi Tobayama, Toshizo Watanabe
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Abstract
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.
Claims5
A grease composition for a magnet clutch of an automobile, comprising:
- 50 to 95% by mass of a base oil;
- a thickener, and,
- optionally a sulfur-containing additive, wherein
- the base oil comprises a synthetic base oil having a sulfur atom in its structure selected from the group consisting of fatty acid sulfides and polysulfides,
- the base oil optionally comprises another base oil selected from the group consisting of mineral oils, ester-based synthetic oils, synthetic hydrocarbon oils, ether-based synthetic oils, silicone oils and fluorinated oils,
- the base oil which optionally comprises the another base oil has a kinematic viscosity at 40° C. of 10 to 200 mm2/s,
- the composition contains 20% by mass or more of a sulfur content derived from the synthetic base oil and the optional sulfur-containing additive in terms of sulfur element total mass of the composition, and
- the thickener is silica treated with dimethyldichlorosilane.
5 more elements
Dependencies are inferred from the claim text.