LUBE BASE OIL AND LUBRICATING OIL COMPOSITION

Title:

LUBE BASE OIL AND LUBRICATING OIL COMPOSITION

Document Type and Number:

WIPO Patent Application WO/2005/118755

Kind Code:

A1

Abstract:

A lube base oil capable of giving a lubricating oil composition which has a low viscosity, is reduced in evaporation amount despite the low viscosity, has a low coefficient of friction and excellent compatibility with organic materials, and is suitable for use in a high-temperature atmosphere; and a lubricating oil composition containing the lube base oil and having such properties. The lube base oil comprises an ether compound represented by the general formula R¹-O-R² (wherein R¹ and R² each independently represents C_2-26 alkyl) as the main component, has a dynamic viscosity at 100°C of 3.5 mm²/s or lower, has a weight loss through evaporation as measured through a Noack test (250°C; 1 hour) of 30 mass% or lower and/or has a flash point of 200°C or higher, and has an aniline point of 60°C or higher. The lubricating oil composition comprises (A) the lube base oil and (B) an organomolybdenum compound incorporated therein in an amount of 100-2,000 mass ppm of the whole composition in terms of molybdenum amount.

Inventors:

TAMOTO YOSHITAKA (JP)

Application Number:

PCT/JP2005/010052

Publication Date:

December 15, 2005

Filing Date:

June 01, 2005

Export Citation:

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Assignee:

IDEMITSU KOSAN CO (JP)
TAMOTO YOSHITAKA (JP)

International Classes:

C10M105/18; C10M135/18; C10M137/10; C10M169/04; C10N10/12; C10N20/00; C10N20/02; C10N30/06; C10N30/08; C10N40/25; (IPC1-7): C10M105/18; C10M169/04

Domestic Patent References:

WO2004058928A1	2004-07-15
WO2004090082A1	2004-10-21

Foreign References:

JPH10324883A	1998-12-08
JP2004051720A	2004-02-19
JPH0959662A	1997-03-04
JPH08245504A	1996-09-24
JPH10324883A	1998-12-08
EP1013750A2	2000-06-28
US5503760A	1996-04-02

Other References:

See also references of EP 1752515A4
TRIBOLOGIST, vol. 38, no. 1, 1993, pages 28 - 31

Attorney, Agent or Firm:

Ohtani, Tamotsu (Bridgestone Toranomon Bldg. 6F. 25-2, Toranomon 3-chom, Minato-ku Tokyo 01, JP)

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