Title:
油圧作動油組成物
Document Type and Number:
Japanese Patent JP5769707
Kind Code:
B2
Abstract:
Disclosed is a hydraulic oil which has excellent stick-slip suppressing properties and oil-water separation properties. The disclosed hydraulic oil includes, in a lubricant base oil, not more than 0.01-10 mass%, with reference to the total amount of lubricating oil, of a glycerol stearate, preferably glycerol mono-isostearate, and 0.0001-0.1 mass%, with reference to the total amount of lubricating oil, of a polyalkylene glycol having a weight-average molecular weight of 5,000-20,000; and at 40°C the hydraulic oil has a dynamic viscosity of 10-600mm2/s and a viscosity index of at least 80.
Inventors:
Kazutoshi Takahashi
Yuji Shitara
Yuji Shitara
Application Number:
JP2012521343A
Publication Date:
August 26, 2015
Filing Date:
February 24, 2011
Export Citation:
Assignee:
jx Nikko Nisseki Energy Co., Ltd.
International Classes:
C10M161/00
Domestic Patent References:
| JP2008127426A | 2008-06-05 | |||
| JP2008069277A | 2008-03-27 | |||
| JP2000256689A | 2000-09-19 |
Attorney, Agent or Firm:
Patent Business Corporation Moegi Patent Office