Title:
LUBRICANT COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2021/182580
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a lubricant composition which has a low viscosity and still exhibits excellent oil film retainability and low evaporativity, while having excellent cleanliness at high temperatures. The problem is solved by a lubricant composition which contains a base oil (A) that contains an olefin polymer (A1), a viscosity index improver (B) and an imide-based dispersant (C), wherein: a first olefin polymer (A1-1) having a kinematic viscosity of 3.0 mm2/s or more at 100°C is contained as the olefin polymer (A1); the content of the first olefin polymer (A1-1) is 30% by mass or more based on the total amount of the base oil (A); a second olefin polymer (A1-2) having a kinematic viscosity of less than 3.0 mm2/s at 100°C is not contained as the olefin polymer (A1), or alternatively is contained in an amount of less than 18.5% by mass based on the total amount of the base oil (A); the content of a resin component (B1) derived from the viscosity index improver (B) is 0.01% by mass or more based on the total amount of the lubricant composition; the nitrogen atom content derived from the imide-based dispersant (C) is 0.06% by mass or more based on the total amount of the lubricant composition; the content ratio of the resin component (B1) derived from the viscosity index improver (B) to the first olefin polymer (A1-1), namely (B1)/(A1-1) is more than 0.001 in terms of the mass ratio; the kinematic viscosity at 100°C is not less than 5.0 mm2/s but less than 7.1 mm2/s; and the aniline point is 95°C or more.
More Like This:
| JPWO2010093045 | Additives for oils containing phosphoric acid ester compounds |
| WO/2002/099021 | HIGH TEMPERATURE LUBRICANT COMPOSITION |
| WO/2002/096989 | LUBRICANT COMPOSITION |
Inventors:
OKI HIROSHI (JP)
Application Number:
PCT/JP2021/009859
Publication Date:
September 16, 2021
Filing Date:
March 11, 2021
Export Citation:
Assignee:
IDEMITSU KOSAN CO (JP)
International Classes:
C10M169/04; C10M101/02; C10M107/02; C10M133/56; C10M137/10; C10N20/02; C10N20/04; C10N30/00; C10N30/04; C10N30/06; C10N40/25
Domestic Patent References:
| WO2014136973A1 | 2014-09-12 | |||
| WO2019031404A1 | 2019-02-14 |
Foreign References:
| JP2014210844A | 2014-11-13 | |||
| JP2010100707A | 2010-05-06 | |||
| US5972852A | 1999-10-26 |
Other References:
HAMAGUCHI, HITOSHI: "Global lubricants / lubricants additives technology and market / standard trends", 7 October 2016, S & T PUBLISHING CO., LTD., JP, ISBN: 978-4-907002-59-6, article HITOSHI HAMAGUCHI: "6.2 Chemical Composition Testing of Lubricants", pages: 165 - 168, XP009539695
See also references of EP 4119642A4
See also references of EP 4119642A4
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
Download PDF: