Title:
LUBRICATING-OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2015/152143
Kind Code:
A1
Abstract:
By using a lubricating-oil composition that has a kinetic viscosity at 100°C of more than 9.3 mm2/s but no more than 12.5 mm2/s, has a high-temperature high-shear viscosity at 150°C of at least 2.9 mPa∙s, and contains (1) a base oil containing a base oil (A) that has a kinetic viscosity at 100°C between 2 and 7 mm2/s, inclusive, and a viscosity index of at most 120, (2) at least one species selected from among acrylate polymers and olefin polymers having mass-average molecular weights of at most 40,000, and (3) a lubricating-oil additive containing a sulfur-based extreme-pressure agent, a lubricating-oil composition that exhibits both reduced viscosity, improving fuel economy, and fatigue resistance, improving fatigue life, and also excels in terms of low-temperature viscosity characteristics can be provided.
Inventors:
WATABE NOBUAKI (JP)
Application Number:
PCT/JP2015/059892
Publication Date:
October 08, 2015
Filing Date:
March 30, 2015
Export Citation:
Assignee:
IDEMITSU KOSAN CO (JP)
International Classes:
C10M161/00; C10M135/00; C10M143/00; C10M145/14; C10N20/02; C10N20/04; C10N30/00; C10N30/02; C10N40/04; C10N40/25
Foreign References:
| JP2000087070A | 2000-03-28 | |||
| JP2011195734A | 2011-10-06 | |||
| JP2013185087A | 2013-09-19 | |||
| JP2012131986A | 2012-07-12 | |||
| JP2001214184A | 2001-08-07 | |||
| JP2004269707A | 2004-09-30 |
Attorney, Agent or Firm:
OHTANI, Tamotsu (JP)
Tamotsu Otani (JP)
Tamotsu Otani (JP)
Download PDF: