LUBRICATING OIL COMPOSITION - IDEMITSU KOSAN CO

Title:

LUBRICATING OIL COMPOSITION

Document Type and Number:

WIPO Patent Application WO/2019/189494

Kind Code:

A1

Abstract:

Provided is a long-lasting lubricating oil composition comprising: a mineral oil-type base oil (A) in which the temperature gradient Δ|Dt| of the distillation temperature between two points representing distillate quantities of 2.0 vol% and 5.0 vol% in a distillation curve is 6.8°C/vol% or less; and an antioxidant (B) containing an amine antioxidant (B1), a phenolic antioxidant (B2), and a phosphoric antioxidant (B3). The content of the component (B3) is 0.06-1.0 mass% relative to the total amount of the lubricating oil composition. The lubricating oil composition maintains excellent oxidation stability even when used over a long period of time in a high-temperature environment and has the effect of suppressing the formation of sludge over a long period of time.

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Inventors:

SATO TOKUE (JP)

Application Number:

PCT/JP2019/013414

Publication Date:

October 03, 2019

Filing Date:

March 27, 2019

Export Citation:

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Assignee:

IDEMITSU KOSAN CO (JP)

International Classes:

C10M129/10; C10M101/02; C10M133/12; C10M137/00; C10M169/04; C10N20/00; C10N30/00; C10N30/04; C10N30/08; C10N30/10; C10N40/02; C10N40/04; C10N40/08; C10N40/12; C10N40/25

Foreign References:

JP2016193994A	2016-11-17
JP2008280540A	2008-11-20
JP2010509472A	2010-03-25
JP2004182931A	2004-07-02
JP2011162629A	2011-08-25

Other References: