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Title:
LUBRICATING COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2004/020557
Kind Code:
A1
Abstract:
A lubricating composition which comprises a base oil for a lubricating oil and (A) at least one compound selected from among specific esters of phosphonic acid and salts thereof or the above lubricating composition which further comprises (B) at least one compound selected from among metal salts of specific esters of phosphoric acid. The lubricating composition is of low phosphorus and low sulfur type and is excellent in oxidation stability, the retention of the base number, wear resistance, extreme pressure characteristics and corrosion preventive property, and thus can be suitably used, in particular, as a lubricating oil for an internal combustion engine.

Inventors:
YAGISHITA KAZUHIRO (JP)
Application Number:
PCT/JP2003/010756
Publication Date:
March 11, 2004
Filing Date:
August 26, 2003
Export Citation:
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Assignee:
NIPPON OIL CORP (JP)
YAGISHITA KAZUHIRO (JP)
International Classes:
C10M101/00; C10M137/00; C10M137/12; C10M141/10; C10M163/00; C10M167/00; C10M169/04; (IPC1-7): C10M137/12; C10M137/00
Domestic Patent References:
WO1996011246A11996-04-18
WO1983003616A11983-10-27
WO1996011246A11996-04-18
WO1983003616A11983-10-27
Foreign References:
GB2017748A1979-10-10
EP0308651A21989-03-29
EP0083124A11983-07-06
JPH09241671A1997-09-16
JPS396213B1
EP1227145A12002-07-31
JP2002294271A2002-10-09
EP1516911A12005-03-23
US3634239A1972-01-11
GB2017748A1979-10-10
EP0308651A21989-03-29
EP0083124A11983-07-06
JPH09241671A1997-09-16
EP1227145A12002-07-31
Other References:
See also references of EP 1544279A4
Attorney, Agent or Firm:
Morita, Nobuyuki (5-8 Nishi-shimbashi 3-chom, Minato-ku Tokyo, JP)
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