LUBRICATION OIL COMPOSITION - IDEMITSU KOSAN CO

Title:

LUBRICATION OIL COMPOSITION

Document Type and Number:

WIPO Patent Application WO/2013/062008

Kind Code:

A1

Abstract:

Provided is a lubrication oil composition having an extremely high viscosity index and, at the same time, a low traction coefficient, which is a fluid friction coefficient in an elastohydrodynamic lubrication region, wherein the lubrication oil composition has excellent energy and fuel efficiency. The lubrication oil composition is characterized in containing the following components (A) and (B). (A) A low-viscosity synthesized oil, which is a compound having an ether bond in the molecule and a kinetic viscosity at 40°C of less than 10 mm2/s, the ratio between the number of oxygen atoms and carbon atoms constituting the compound (the O/C ratio) and the kinetic viscosity (mm2/s) of the compound at 40°C satisfying the following equation (1). Kinetic viscosity at 40°C ≤ 12 - [(O/C ratio) × 30] (1) (B) A high-viscosity synthesized oil, which is a hydrocarbon-based synthesized oil having a kinetic viscosity at 100°C of no less than 40 mm2/s, and which comprises one or more materials selected from α-olefin oligomers, hydrides of α-olefin oligomers, and ethylene-propylene copolymerization oligomers.

Inventors:

TAMOTO YOSHITAKA (JP)
TSUBOUCHI TOSHIYUKI (JP)

Application Number:

PCT/JP2012/077480

Publication Date:

May 02, 2013

Filing Date:

October 24, 2012

Export Citation:

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Assignee:

IDEMITSU KOSAN CO (JP)
TAMOTO YOSHITAKA (JP)
TSUBOUCHI TOSHIYUKI (JP)

International Classes:

C10M111/04; C10M105/18; C10M105/34; C10M105/38; C10M107/02; C10M107/06; C10N20/02; C10N30/00; C10N30/02; C10N30/06; C10N40/02; C10N40/04

Foreign References:

JP2007505191A	2007-03-08
JP2008530268A	2008-08-07
JPS5989397A	1984-05-23
JPH08508531A	1996-09-10
JP2007137953A	2007-06-07
JP2008530268A	2008-08-07

Other References: