| (19) |
 |
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(11) |
EP 0 822 246 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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15.04.1998 Bulletin 1998/16 |
| (43) |
Date of publication A2: |
|
04.02.1998 Bulletin 1998/06 |
| (22) |
Date of filing: 30.07.1997 |
|
| (51) |
International Patent Classification (IPC)6: C10M 135/00, C10M 141/10
// (C10M135/00, 135:14, 135:18, 135:22, 135:22, 135:26, 135:26, 135:28, 135:28, 135:30,
135:36),(C10M141/10, 135:14, 135:18, 135:22, 135:26) |
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
| (30) |
Priority: |
02.08.1996 JP 220462/96
|
| (71) |
Applicant: TONEN CORPORATION |
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Chiyoda-Ku,
Tokyo 100 (JP) |
|
| (72) |
Inventor: |
|
- Arai, Katsuya
Iruma-Gun,
Saitama-Ken 356 (JP)
|
| (74) |
Representative: Fletcher Watts, Susan J. et al |
|
ESSO Engineering (Europe) Limited,
Patents and Licences,
Mailpoint 72,
Esso House,
Ermyn Way
Leatherhead,
Surrey KT22 8XE
Leatherhead,
Surrey KT22 8XE (GB) |
|
| |
|
| (54) |
Lubricating oil composition |
(57) The present invention is a lubricating oil, especially a lubricating oil for internal
combustion engines, which has friction-reducing properties even under sliding conditions
varying substantially in internal combustion engines and the like and which can retain
friction-reducing properties over an extend even in the presence of nitrogen oxide
gas. The lubricating oil composition contains a lubricating base oil, and an organomolybdenum
compound, an organomono-sulfide compound, and an organopolysulfide compound.