LUBRICANT COMPOSITION FOR INTERNAL COMBUSTION ENGINE

Title:

LUBRICANT COMPOSITION FOR INTERNAL COMBUSTION ENGINE

Document Type and Number:

WIPO Patent Application WO/2008/029756

Kind Code:

A1

Abstract:

Disclosed is a lubricant composition for internal combustion engines, which contains a base oil, (A) at least one compound selected from disulfide compounds represented by the following general formula (I): R1OOC-A1-S-S-A2-COOR2 (I) and disulfide compounds represented by the following general formula (II): R7OOC-CR9R10-CR11(COOR8)-S-S-CR16(COOR13)-CR14R15-COOR12 (II) , (B) an organic molybdenum compound and (C) a phenol antioxidant and/or an amine antioxidant. This lubricant composition is a low ash, lowphosphorus lubricant composition used for internal combustion engines such as gasoline engines, diesel engines and gas engines, which is improved in oxidation stability and friction reducing effect, while conforming to environmental regulations.

Inventors:

KAMANO HIDEKI (JP)

Application Number:

PCT/JP2007/067121

Publication Date:

March 13, 2008

Filing Date:

September 03, 2007

Export Citation:

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Assignee:

IDEMITSU KOSAN CO (JP)
KAMANO HIDEKI (JP)

International Classes:

C10M135/26; C10M129/10; C10M133/12; C10M133/16; C10M137/10; C10M159/18; C10M159/20; C10M159/22; C10M159/24; C10N10/12; C10N20/00; C10N30/06; C10N30/10; C10N40/25

Domestic Patent References:

WO2002016532A1	2002-02-28
WO2004069966A1	2004-08-19
WO2006013946A1	2006-02-09

Foreign References:

JPH1046177A	1998-02-17
JPH0873878A	1996-03-19
JP2003336089A	2003-11-28
JP2007063431A	2007-03-15
JP2002060776A	2002-02-26
JP2004262964A	2004-09-24
JP2006045335A	2006-02-16
JP2001262175A	2001-09-26
JP2003252887A	2003-09-10
JP2003523454A	2003-08-05
JP2003500521A	2003-01-07
JP2004051985A	2004-02-19
JPH0322438B2	1991-03-26
JP2004002866A	2004-01-08

Other References: