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1. (WO2018043432) VACUUM PUMP OIL

Pub. No.:    WO/2018/043432    International Application No.:    PCT/JP2017/030799
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Tue Aug 29 01:59:59 CEST 2017
IPC: C10M 169/04
C10M 101/02
C10M 129/10
C10M 133/12
C10N 30/00
C10N 30/10
C10N 40/00
Applicants: IDEMITSU KOSAN CO.,LTD.
出光興産株式会社
Inventors: SATO, Tokue
佐藤 徳栄
Title: VACUUM PUMP OIL
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.