Title:
LUBRICATING OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2022/138292
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a lubricating oil composition that exhibits excellent brake squeal prevention performance and anti-seizure performance. This problem can be solved by a lubricating oil composition that contains: a base oil (A); zinc dithiophosphate (B); and a sarcosine-based compound (C). The content of the sarcosine-based compound (C) is more than 0.05 mass% and not more than 0.40 mass% relative to the total amount of the lubricating oil composition. The composition satisfies requirement (α) or requirement (β). Requirement (α): in a case where the content of the sarcosine-based compound (C) is more than 0.05 mass% and less than 0.20 mass% relative to the total amount of the lubricating oil composition, the composition optionally contains one or more types of phosphorus-based compound (D) selected from the group consisting of an acidic phosphoric acid ester (D1) and an amine salt thereof (D2). Requirement (β): in a case where the content of the sarcosine-based compound (C) is 0.20-0.40 mass% relative to the total amount of the lubricating oil composition, the composition contains the phosphorus-based compound (D) at a quantity of less than 0.50 mass% relative to the total amount of the lubricating oil composition.
Inventors:
TAKEKAWA DAISUKE (JP)
KOJIMA KENTARO (JP)
KOJIMA KENTARO (JP)
Application Number:
PCT/JP2021/045873
Publication Date:
June 30, 2022
Filing Date:
December 13, 2021
Export Citation:
Assignee:
IDEMITSU KOSAN CO (JP)
International Classes:
C10M141/10; C10M133/16; C10M137/10; C10N10/04; C10N30/00; C10N30/06; C10N40/04; C10N40/08
Domestic Patent References:
| WO2015146666A1 | 2015-10-01 | |||
| WO2016129465A1 | 2016-08-18 | |||
| WO2015022976A1 | 2015-02-19 |
Foreign References:
| JP2005307202A | 2005-11-04 | |||
| JP2015147859A | 2015-08-20 | |||
| JP2006316147A | 2006-11-24 | |||
| JP2002038180A | 2002-02-06 | |||
| JP2000219888A | 2000-08-08 | |||
| CN108865346A | 2018-11-23 | |||
| CN105255545A | 2016-01-20 |
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
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