Title:
LUBRICATING OIL COMPOSITION FOR INTERNAL COMBUSTION ENGINES
Document Type and Number:
WIPO Patent Application WO/2011/115265
Kind Code:
A1
Abstract:
Provided is a lubricating oil composition for internal combustion engines, which has a low viscosity and can nevertheless reduce noise in running, prevent fatigue damage such as gear pitting, and reduce the consumption of lubricating oil, and which can ensure high fuel efficiency. A lubricating oil composition for internal combustion engines, which is characterized by: comprising a base oil that exhibits a viscosity index of 125 or more and a Noack evaporation loss (250°C × 1h) of 15mass% or less, and 0.1 to 10mass% (relative to the whole composition) of a C2-20 olefin polymer (A) that has a mass-average molecular weight of 500 to 10,000 and/or a high-molecular compound (B) that has a mass-average molecular weight of 10,000 to less than 100,000; and having a high-molecular compound (C) content of less than 1.0mass%, the compound (C) having a mass-average molecular weight of 100,000 or more.
Inventors:
YAMADA RYOU (JP)
Application Number:
PCT/JP2011/056626
Publication Date:
September 22, 2011
Filing Date:
March 18, 2011
Export Citation:
Assignee:
IDEMITSU KOSAN CO (JP)
YAMADA RYOU (JP)
YAMADA RYOU (JP)
International Classes:
C10M169/04; C10M101/02; C10M135/18; C10M139/00; C10M143/00; C10M143/06; C10M143/10; C10M145/14; C10N10/12; C10N20/00; C10N20/02; C10N20/04; C10N40/25
Domestic Patent References:
| WO2007114132A1 | 2007-10-11 | |||
| WO2007105769A1 | 2007-09-20 | |||
| WO2008093446A1 | 2008-08-07 | |||
| WO2008123227A1 | 2008-10-16 | |||
| WO2010140562A1 | 2010-12-09 |
Foreign References:
| JP2005154760A | 2005-06-16 | |||
| JP2004137317A | 2004-05-13 | |||
| JP2003041283A | 2003-02-13 | |||
| JP2002038182A | 2002-02-06 | |||
| JPH06306384A | 1994-11-01 |
Attorney, Agent or Firm:
OHTANI, Tamotsu et al. (JP)
Tamotsu Otani (JP)
Tamotsu Otani (JP)
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Claims: