Title:
LUBRICATING OIL
Document Type and Number:
WIPO Patent Application WO/2004/041977
Kind Code:
A1
Abstract:
A lubricating oil composition which comprises (A) a base oil for a lubricating oil comprising a mineral oil, a synthetic oil or a mixture thereof, (B) a nitrogen-containing compound having at least one alkyl group or alkenyl group and having a number average molecular weight of 900 or more and/or a derivative thereof in an amount of 0.01 to 0.20 mass % as a nitrogen content on the basis of the total amount of the composition, and (C) a viscosity index improver having a weight average molecular weight of 40,000 or less, and which has a viscosity index of 160 or higher and a kinematic viscosity at 40°C of 20 to 30 mm2/s. The lubricating oil composition has a low viscosity and also is capable of exhibiting good anti-wear characteristics both in an early stage of use and after the use for a long period, and thus can be advantageously used for an automatic transmission or a continuously variable transmission.
Inventors:
ARIMOTO NAOZUMI (JP)
OKAWA TETSUO (JP)
OKAWA TETSUO (JP)
Application Number:
PCT/JP2003/014032
Publication Date:
May 21, 2004
Filing Date:
October 31, 2003
Export Citation:
Assignee:
NIPPON OIL CORP (JP)
ARIMOTO NAOZUMI (JP)
OKAWA TETSUO (JP)
ARIMOTO NAOZUMI (JP)
OKAWA TETSUO (JP)
International Classes:
C10M101/02; C10M105/04; C10M105/36; C10M105/38; C10M133/54; C10M133/56; C10M139/00; C10M143/04; C10M145/14; C10M161/00; C10M169/04; C10N20/02; C10N20/04; C10N30/06; C10N40/04; (IPC1-7): C10M161/00
Domestic Patent References:
| WO2000071646A1 | 2000-11-30 |
Foreign References:
| EP0949319A2 | 1999-10-13 | |||
| EP1118654A1 | 2001-07-25 | |||
| EP0699738A1 | 1996-03-06 | |||
| EP1118654A1 | 2001-07-25 |
Other References:
See also references of EP 1559772A4
Attorney, Agent or Firm:
Hoshino, Tetsuro c/o Tokyo, Central Patent Firm (4th Floor Oak Building Kyobashi, 16-10,
Kyobashi 1-chom, Chuou-ku Tokyo, JP)
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