Title:
LUBRICATING OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2003/025103
Kind Code:
A1
Abstract:
A lubricating oil composition which is highly effective in wearing prevention and prevents pitching to attain an improved fatigue life. It is usable especially as an automotive transmission oil. The composition comprises a lube base oil and incorporated therein: (A) 0.02 to 0.1 wt.% ash−free boron compound dispersant in terms of boron amount based on the whole lubricating oil composition&semi (B) at least 0.01 wt.% alkaline earth metal compound cleaning agent having a total base number of 0 to 500 mgKOH&sol g, in terms of alkaline earth metal amount based on the whole lubricating oil composition&semi and (C) an alkali metal borate or a hydrate thereof.
Inventors:
MORITA EITARO (JP)
Application Number:
PCT/JP2002/009122
Publication Date:
March 27, 2003
Filing Date:
September 06, 2002
Export Citation:
Assignee:
NIPPON OIL CORP (JP)
MORITA EITARO (JP)
MORITA EITARO (JP)
International Classes:
C10M125/26; C10M129/10; C10M129/54; C10M135/10; C10M139/00; C10M141/08; C10M159/20; C10M159/22; C10M159/24; C10M163/00; C10M169/04; C10N10/02; C10N10/04; C10N20/00; C10N30/00; C10N30/06; C10N40/00; C10N40/04; C10N40/12; C10N40/25; C10N40/30; (IPC1-7): C10M163/00; C10M167/00
Domestic Patent References:
| WO1996037585A1 | 1996-11-28 |
Foreign References:
| JP2002129182A | 2002-05-09 | |||
| EP0695798A2 | 1996-02-07 | |||
| JP2000063878A | 2000-02-29 | |||
| US20010034305A1 | 2001-10-25 | |||
| JP2002003875A | 2002-01-09 |
Other References:
See also references of EP 1428865A4
Attorney, Agent or Firm:
Morita, Nobuyuki (5-8 Nishi-shimbashi 3-chom, Minato-ku Tokyo, JP)
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