Title:
LUBRICATING OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2021/117906
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a lubricating oil composition having a high coefficient of friction between metals, excellent anti-shudder life, and excellent abrasion resistance. The problem is solved by a lubricating oil composition containing: a base oil (X); a metal-based cleaning agent (A); a primary phosphorus-based compound (B); a secondary phosphorus-based compound (C); and a borated imide compound (D). Specifically, the problem is solved by providing a lubricating oil composition wherein: the metal-based cleaning agent (A) contains a calcium-based cleaning agent (A1) having a base value of at least 150 mgKOH/g; the primary phosphorus-based compound (B) is at least one selected from among an acidic phosphite ester (B1) and an acidic phosphate ester (B2); the secondary phosphorus-based compound (C) is at least one selected from among specific compounds; and a specific requirement is satisfied.
Inventors:
YOKOMIZO MASATO (JP)
YANAGIHARA TAKASHI (JP)
YANAGIHARA TAKASHI (JP)
Application Number:
PCT/JP2020/046542
Publication Date:
June 17, 2021
Filing Date:
December 14, 2020
Export Citation:
Assignee:
IDEMITSU KOSAN CO (JP)
International Classes:
C10M141/12; C10M137/02; C10M137/04; C10M139/00; C10M159/22; C10M159/24; C10N10/04; C10N20/00; C10N20/02; C10N30/00; C10N30/06; C10N40/04
Domestic Patent References:
| WO2009101847A1 | 2009-08-20 |
Foreign References:
| JP2016193997A | 2016-11-17 | |||
| JP2017101151A | 2017-06-08 | |||
| JP2011006705A | 2011-01-13 | |||
| JP2015151490A | 2015-08-24 |
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
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