Title:
VACUUM PUMP OIL
Document Type and Number:
Japanese Patent JP2018035258
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a vacuum pump oil that has a good ultimate vacuum, excels in water separability, oxidation stability, and shear stability, and can fit for various uses.SOLUTION: A vacuum pump oil contains: a mineral oil (A) in which the temperature gradient |Δη*| of a complex viscosity between two points of -10°C and -20°C measured at an angular velocity of 6.3 rad/s with a rotary rheometer is 5 Pa s/°C or less, and at least one compound selected from a phenolic compound (B) and an amine compound (C) and has a viscosity index of less than 150.SELECTED DRAWING: None
Inventors:
SATO TOKUEI
Application Number:
JP2016169461A
Publication Date:
March 08, 2018
Filing Date:
August 31, 2016
Export Citation:
Assignee:
IDEMITSU KOSAN CO
International Classes:
C10M169/04; C10M101/02; C10M129/10; C10M133/12
Domestic Patent References:
| JP2014214258A | 2014-11-17 | |||
| JP2014129461A | 2014-07-10 | |||
| JPH11131081A | 1999-05-18 | |||
| JP2006342149A | 2006-12-21 | |||
| JPH07166184A | 1995-06-27 |
Foreign References:
| WO2010041591A1 | 2010-04-15 | |||
| US20110230685A1 | 2011-09-22 | |||
| US20070000807A1 | 2007-01-04 |
Attorney, Agent or Firm:
Tamotsu Otani
Yoshio Takizawa
Toshihide Ishihara
Yoshio Takizawa
Toshihide Ishihara