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Title:
GEAR OIL COMPOSITION
Document Type and Number:
Japanese Patent JP2005290182
Kind Code:
A
Abstract:

To provide a gear oil composition resistant to higher temperatures and withstanding operation under a higher load together with a tendency to a higher speed and a higher output as a gear oil in response to high efficiency and low cost because of requests for gears used for various kinds of industrial machines, specifically a gear oil having excellent sludge resistant performances and water-separating properties.

The gear oil composition is obtained by including a dispersible type viscosity index improver as an essential ingredient in at least one kind selected from mineral oils, oils and fats and synthetic oils as a base oil. A dispersible type polymethacrylate having 5,000-100,000 number-average molecular weight, a dispersible type styrene-maleic anhydride ester copolymer having 5,000-100,000 number-average molecular weight, a dispersible type olefin copolymer having 5,000-100,000 number-average molecular weight, a dispersible type olefin-methacrylate copolymer having 5,000-100,000 number-average molecular weight and a mixture thereof, etc., are preferably used as the dispersible type viscosity index improver from the viewpoint of especially excellent inhibitory effects on sludge formation.


Inventors:
TAKIGAWA KATSUYA
BEPPU KOJI
MITSUMOTO SHINICHI
Application Number:
JP2004106670A
Publication Date:
October 20, 2005
Filing Date:
March 31, 2004
Export Citation:
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Assignee:
NIPPON OIL CORP
International Classes:
C10M169/04; C10M101/02; C10M101/04; C10M129/10; C10M129/40; C10M133/12; C10M133/16; C10M133/56; C10M135/36; C10M137/06; C10M149/02; C10M149/10; C10N30/00; C10N30/02; C10N30/04; C10N30/08; C10N40/00; C10N40/02; C10N40/04; C10N40/08; C10N40/12; C10N40/30; (IPC1-7): C10M169/04; C10M101/02; C10M101/04; C10M129/10; C10M129/40; C10M133/12; C10M133/16; C10M133/56; C10M135/36; C10M137/06; C10M149/02; C10M149/10
Domestic Patent References:
JPS60248796A1985-12-09
JP2002265971A2002-09-18
JP2002294268A2002-10-09
JP2002338983A2002-11-27
JP2005008695A2005-01-13
JP2004292684A2004-10-21
JPH08277325A1996-10-22
JPH08277323A1996-10-22
JP2002105477A2002-04-10
JP2001262176A2001-09-26
JP2001107074A2001-04-17
JP2001279286A2001-10-10
JP2002105478A2002-04-10
JP2000063866A2000-02-29
Attorney, Agent or Firm:
Teruo Akimoto



 
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