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Title:
LUBRICATING OIL COMPOSITION
Document Type and Number:
Japanese Patent JP2008266656
Kind Code:
A
Abstract:

To provide a lubricating oil composition which has a good foam suppressing effect in a wide range from low to high temperatures.

The lubricating oil composition comprises a lubricant base oil and an additive in the base oil. The additive contains not less than 10 ppm of compound which is effective in a foam suppressing, especially based on a total weight of the lubricating oil composition. The compound has a skeletal structure of at least one of perfluoropolyether, whose dynamic viscosity at 25C is not less than 20 mm2/s.


Inventors:
Koganei, Katsuya
Application Number:
JP2008000176271
Publication Date:
November 06, 2008
Filing Date:
July 04, 2008
Export Citation:
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Assignee:
TONENGENERAL SEKIYU KK
International Classes:
C10M131/10; C10M101/02; C10M147/04; C10N20/02; C10N40/00; C10N40/04; C10N40/08; C10N40/12; C10N40/25; C10N40/30
Domestic Patent References:
JPH03126790A
JPS52135307A
JPH1088166A
JP2000337380A
JPS4833157B1
Foreign References:
WO2001057165A1
US20030086203A1
Attorney, Agent or Firm:
久保田 耕平