LUBRICANT OIL COMPOSITION - NIPPON OIL CORP

Title:

LUBRICANT OIL COMPOSITION

Document Type and Number:

WIPO Patent Application WO/2010/140446

Kind Code:

A1

Abstract:

Disclosed is a lubricant oil composition which comprises: a lubricant base oil having a kinematic viscosity of 1 to 10 mm2/s at 100°C, a %Cp value of 70 or more and a %CA value of 2 or less; and a viscosity index-improving agent having a weight average molecular weight of 100,000 or more and a ratio of the weight average molecular weight to a PSSI value of 1.0×104 or more and contained in an amount of 0.1 to 50% by mass relative to the total amount of the composition. The lubricant oil composition has a kinematic viscosity of 9.0 to 12.5 mm2/s at 100°C and an HTHS viscosity of 2.8 mPa·s or more at 150°C. Also disclosed is a lubricant oil composition which comprises: a lubricant base oil having a kinematic viscosity of 1 to 6 mm2/s at 100°C, a %Cp value of 70 or more, and a %CA value of 2 or less; a hydrocarbon-type viscosity index-improving agent having a PSSI value of 20 or less; and a poly(meth)acrylate-type viscosity index-improving agent.

Inventors:

YAGUCHI AKIRA (JP)
MATSUI SHIGEKI (JP)
TSUJIMOTO TEPPEI (JP)

Application Number:

PCT/JP2010/057957

Publication Date:

December 09, 2010

Filing Date:

May 11, 2010

Export Citation:

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Assignee:

NIPPON OIL CORP (JP)
YAGUCHI AKIRA (JP)
MATSUI SHIGEKI (JP)
TSUJIMOTO TEPPEI (JP)

International Classes:

C10M171/00; C10N20/00; C10N20/02; C10N20/04; C10N30/00; C10N30/02; C10N40/25

Domestic Patent References:

WO2008093446A1	2008-08-07
WO2007119299A1	2007-10-25
WO2007001000A1	2007-01-04
WO2005037967A1	2005-04-28

Foreign References:

JP2001279287A	2001-10-10
JP2002129182A	2002-05-09
JPH08302378A	1996-11-19
JPH06306384A	1994-11-01

Other References: