Title:
VACUUM PUMP OIL
Document Type and Number:
WIPO Patent Application WO/2018/043432
Kind Code:
A1
Abstract:
Provided is a vacuum pump oil which has a viscosity index of less than 160, and includes one or more compounds selected from (A) a mineral oil which has a temperature gradient ∆|η*| of the complex viscosity between two points, t°C and t-10°C (provided that -15≤t≤-10), measured at an angular velocity of 6.3 rad/s using a rotary rheometer of 10 Pa∙s/°C or less, (B) a phenolic compound, and (C) an amine-based compound. The vacuum pump oil provides a good ultimate vacuum, and has excellent water separation properties, oxidation stability, and shear stability, making the vacuum pump oil suitable for a variety of applications.
Inventors:
SATO TOKUE (JP)
Application Number:
PCT/JP2017/030799
Publication Date:
March 08, 2018
Filing Date:
August 28, 2017
Export Citation:
Assignee:
IDEMITSU KOSAN CO (JP)
International Classes:
C10M169/04; C10M101/02; C10M129/10; C10M133/12; C10N30/00; C10N30/10; C10N40/00
Foreign References:
| JP2014214258A | 2014-11-17 | |||
| JP2014129461A | 2014-07-10 | |||
| JPH11131081A | 1999-05-18 | |||
| JP2006342149A | 2006-12-21 | |||
| JPH07166184A | 1995-06-27 | |||
| JP2014129461A | 2014-07-10 | |||
| JP2014214258A | 2014-11-17 |
Other References:
See also references of EP 3508559A4
Attorney, Agent or Firm:
OHTANI, Tamotsu et al. (JP)
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