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US 2016/0257902 A1Published application
Lubricating oil composition
AssigneeIdemitsu Kosan Co., Ltd.
InventorsTakuya ONO, Tahei OKADA
Life of this patent
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Abstract
Provided is a lubricating oil composition containing (A) 70 mass % or more and 95 mass % or less of a poly-α-olefin base oil, (B) 5 mass % or more and 20 mass % or less of an ester-based base oil, and (C) an ester-based defoaming agent, the poly-α-olefin base oil (A) being a polymer of an α-olefin having 8 to 12 carbon atoms. The lubricating oil composition is able to keep excellent defoaming performance over a long period of time and is suitable as a step-up gear oil composition for wind power generation.
Claims6
A lubricating oil composition, comprising
- (A) 70 mass % or more and 95 mass % or less of a poly-α-olefin base oil,
- (B) 5 mass % or more and 20 mass % or less of an ester-based base oil, and
- (C) an ester-based defoaming agent,
- wherein the poly-α-olefin base oil (A) is a polymer of an α-olefin comprising 8 to 12 carbon atoms.
1 more element
Dependencies are inferred from the claim text.