Title:
LUBRICATING OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2022/019333
Kind Code:
A1
Abstract:
The present invention has addressed the problem of providing a lubricating oil composition that has ensured electrically insulating properties and a high flash point while having excellent cooling performance. Moreover, the problem has been solved by a lubricating oil composition comprising a base oil (A), wherein: the base oil (A) contains an ester-based synthetic oil (A1); the content of the ester-based synthetic oil (A1) is 30-100 mass% with respect to the total amount of the base oil (A); the ester-based synthetic oil (A1) is at least one selected from the group consisting of an ester (A1-1) of a monohydric alcohol with a monobasic acid and an ester (A1-2) of a monohydric alcohol with a polybasic acid; and the base oil (A) satisfies the following requirements (1)-(3). ∙ Requirement (1): The kinematic viscosity at 40ºC is 2.00 mm2/s to 4.00 mm2/s. ∙ Requirement (2): The specific heat at 20ºC is at most 1.75 kJ/(kg∙K). ∙ Requirement (3): The density at 20ºC is at least 0.850 g/cm3.
Inventors:
KATO SHOTA (JP)
NARITA KEIICHI (JP)
KOSHIMA HIROAKI (JP)
OGATA KENICHI (JP)
NARITA KEIICHI (JP)
KOSHIMA HIROAKI (JP)
OGATA KENICHI (JP)
Application Number:
PCT/JP2021/027356
Publication Date:
January 27, 2022
Filing Date:
July 21, 2021
Export Citation:
Assignee:
IDEMITSU KOSAN CO (JP)
International Classes:
C10M105/34; C10M105/36; H02K9/19; C10N20/00; C10N20/02; C10N30/00; C10N30/08; C10N40/00; C10N40/04; C10N40/25
Domestic Patent References:
| WO2016167176A1 | 2016-10-20 |
Foreign References:
| JPS60255894A | 1985-12-17 | |||
| JP2012131879A | 2012-07-12 | |||
| JP2012087269A | 2012-05-10 | |||
| JP2018090729A | 2018-06-14 |
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
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