Title:
LUBRICATING OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2023/210218
Kind Code:
A1
Abstract:
In order to provide a lubricating oil composition which has low viscosity but improves extreme pressure resistance, wear resistance, and fatigue resistance, which have a tendency to worsen with a reduction in the viscosity of a lubricating oil, and is also able to satisfy the wet clutch performance required in a transmission while suppressing a reduction in oxidative stability, the present invention contains a lubricating base oil comprising a mineral base oil and/or a synthetic base oil, (A) a thiadiazole compound, (B) a sulfur-free phosphorus compound, (C) a calcium detergent comprising a calcium phenate detergent, (D) a succinimide dispersant comprising a boron-containing succinimide dispersant, and (E) an oiliness agent-based friction modifier, and has a sulfur content of at most 0.050 mass%, a boron content of less than 0.030 mass%, a kinematic viscosity at 100°C of at most 6.2 mm2/s, a mass ratio MS/MP of the sulfur content MS to the phosphorus content MP of at most 1.00, and a mass ratio MB/MCa of the boron content MB to the calcium content MCa of 0.80-1.20.
Inventors:
KOMATSUBARA HITOSHI (JP)
TAKAHASHI TSUTOMU (JP)
TAKAHASHI TSUTOMU (JP)
Application Number:
PCT/JP2023/011484
Publication Date:
November 02, 2023
Filing Date:
March 23, 2023
Export Citation:
Assignee:
ENEOS CORP (JP)
International Classes:
C10M141/12; C10M161/00; C10M167/00; C10M129/10; C10M133/12; C10M135/36; C10M137/00; C10M139/00; C10M145/14; C10M159/22; C10N10/04; C10N20/02; C10N20/04; C10N30/00; C10N30/06; C10N30/10; C10N40/04
Domestic Patent References:
| WO2014142231A1 | 2014-09-18 |
Foreign References:
| JP2020164588A | 2020-10-08 | |||
| JP2003073683A | 2003-03-12 | |||
| JP2021006617A | 2021-01-21 | |||
| JP2018177986A | 2018-11-15 | |||
| JP2018070700A | 2018-05-10 | |||
| JPH05105892A | 1993-04-27 | |||
| JPH1192779A | 1999-04-06 | |||
| JPH06240275A | 1994-08-30 |
Attorney, Agent or Firm:
YAMAMOTO, Noriaki et al. (JP)
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