Title:
GEAR OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2012/124189
Kind Code:
A1
Abstract:
As a gear oil composition that achieves both fuel saving performance and satisfactory durability of gears, bearings and the like, provided is a gear oil composition obtained by blending 0.02 to 0.5 mass % in terms of quantity of metallic zinc, relative to the total mass of the gear oil composition, of a zinc dialkyldithiophosphate (D) and 0.1 to 0.5 mass % in terms of elemental metal, relative to the total mass of the gear oil composition, of an alkaline earth metal-based detergent (E) having a base number of 100 mg KOH/g or higher in a base oil obtained by blending 2 to 40 mass %, relative to the total mass of the base oil composition, of a solvent-refined mineral oil-based lubricating oil (B) having a kinematic viscosity of 10 to 70 mm2/s at 100°C in a mineral oil-based lubricating base oil (A) having a kinematic viscosity of 2 to 6 mm2/s at 100°C, a %CA of 0.5 or lower and a tertiary carbon content of 7% or higher.
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Inventors:
NAKAO HAJIME (JP)
KOMATSUBARA HITOSHI (JP)
KOMATSUBARA HITOSHI (JP)
Application Number:
PCT/JP2011/070812
Publication Date:
September 20, 2012
Filing Date:
September 13, 2011
Export Citation:
Assignee:
JX NIPPON OIL & ENERGY CORP (JP)
NAKAO HAJIME (JP)
KOMATSUBARA HITOSHI (JP)
NAKAO HAJIME (JP)
KOMATSUBARA HITOSHI (JP)
International Classes:
C10M169/04; C10M101/02; C10M105/38; C10M135/04; C10M135/10; C10M137/10; C10M145/14; C10N20/02; C10N30/02; C10N30/04; C10N40/04
Domestic Patent References:
| WO2007001000A1 | 2007-01-04 |
Foreign References:
| JP2004262979A | 2004-09-24 | |||
| JP2008120909A | 2008-05-29 | |||
| JP2008120908A | 2008-05-29 | |||
| JPH0339399A | 1991-02-20 | |||
| JPH07268375A | 1995-10-17 | |||
| JP2000063869A | 2000-02-29 |
Other References:
See also references of EP 2687585A4
Attorney, Agent or Firm:
MORITA, NOBUYUKI (JP)
Yoriyuki Morita (JP)
Yoriyuki Morita (JP)
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Claims: