Title:
LUBRICANT OIL COMPOSITION FOR TRANSMISSIONS
Document Type and Number:
WIPO Patent Application WO/2014/129032
Kind Code:
A1
Abstract:
As a lubricant oil composition having improved fuel consumption saving performance and also having an excellent metal fatigue preventing property and excellent heat resistance, a lubricant oil composition for transmissions is provided, which comprises: a lubricant oil base oil comprising (A) 50 to 97% by mass of a mineral-oil-type base oil having a kinematic viscosity of 1.5 to 3.5 mm2/s at 100˚C, a pour point of -25˚C or lower, a viscosity index of 105 or more, a %CP value of 85 or more, a %CN value of 2 to 20 and a %CA value of 3 or less and (B) 3 to 10% by mass of a monoester-type base oil having a kinematic viscosity of 2 to 10 mm2/s at 100˚C; (C) phosphorous acid ester in such an amount that the phosphorous content in the composition becomes 250 to 350 ppm by mass in terms of phosphorous atom content; and (D) a boronated ashless dispersant in an amount of 30 to 120 ppm by mass in terms of boron atom content relative to the whole amount of the lubricant oil composition. In the oil composition, the ratio of the amount (% by mass) of boron atoms to the amount (% by mass) of phosphorus atoms (i.e., B/P) is 0.07 to 0.42, and the kinematic viscosity of the composition is 2.5 to 4.0 mm2/s at 100˚C.
Inventors:
NAKAO HAJIME (JP)
KOMATSUBARA HITOSHI (JP)
ISHIKAWA KAZUNORI (JP)
YAMADA KATSUHITO (JP)
KOMATSUBARA HITOSHI (JP)
ISHIKAWA KAZUNORI (JP)
YAMADA KATSUHITO (JP)
Application Number:
PCT/JP2013/081112
Publication Date:
August 28, 2014
Filing Date:
November 19, 2013
Export Citation:
Assignee:
JX NIPPON OIL & ENERGY CORP (JP)
AISIN AW CO (JP)
AISIN AW CO (JP)
International Classes:
C10M169/04; C10M101/02; C10M105/34; C10M129/70; C10M135/20; C10M135/36; C10M137/02; C10M139/00; C10N20/00; C10N20/02; C10N30/00; C10N30/02; C10N30/06; C10N40/04
Domestic Patent References:
| WO2009125551A1 | 2009-10-15 | |||
| WO2004074414A1 | 2004-09-02 |
Foreign References:
| JP2010037421A | 2010-02-18 | |||
| JP2004262979A | 2004-09-24 | |||
| JPH11286696A | 1999-10-19 | |||
| JP2003514099A | 2003-04-15 |
Other References:
See also references of EP 2960321A4
Attorney, Agent or Firm:
MORITA, NOBUYUKI (JP)
Yoriyuki Morita (JP)
Yoriyuki Morita (JP)
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