Title:
LUBRICANT COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2019/189168
Kind Code:
A1
Abstract:
Provided is a lubricant composition including 30mass% or more, based on the total quantity of the lubricant composition, of a mineral oil (A) that includes a bright stock (A1), and further including a synthetic oil (B) and a phosphoric acid ester (C), wherein the content of the synthetic oil (B) is less than 70mass% based on the total quantity of the lubricant composition, the content of the phosphoric acid ester (C) in terms of phosphorus atoms is 0.050-0.200mass% based on the total quantity of the lubricant composition, and the viscosity index is 150 or greater, whereby the lubricant composition has a low temperature dependence and good lubrication properties even when a mineral oil including a bright stock is used.
Inventors:
ONO TAKUYA (JP)
Application Number:
PCT/JP2019/012832
Publication Date:
October 03, 2019
Filing Date:
March 26, 2019
Export Citation:
Assignee:
IDEMITSU KOSAN CO (JP)
International Classes:
C10M137/04; C10M101/02; C10M107/02; C10M137/08; C10M169/04; C10N20/02; C10N30/00; C10N30/06; C10N40/02
Domestic Patent References:
| WO2013154005A1 | 2013-10-17 |
Foreign References:
| JP2008274190A | 2008-11-13 | |||
| JP2006176775A | 2006-07-06 | |||
| JP2013145046A | 2013-07-25 | |||
| JP2000230633A | 2000-08-22 | |||
| JP2015086286A | 2015-05-07 | |||
| JPH08165482A | 1996-06-25 | |||
| JPS62275198A | 1987-11-30 |
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
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