Title:
鉱油系基油、潤滑油組成物、内燃機関、及び内燃機関の潤滑方法
Document Type and Number:
Japanese Patent JP6915938
Kind Code:
B2
Abstract:
Disclosed herein is a mineral base oil satisfying the following requirements (I) to (V): (I): a kinematic viscosity at 100° C. is 2 mm2/s or more and less than 7 mm2/s; (II): a viscosity index is 100 or more; (III): a temperature gradient Δ|η*| of complex viscosity between two points of −10° C. and −25° C. is 60 Pa·s/° C. or less as measured with a rotary rheometer under conditions at an angular velocity of 6.3 rad/s and a strain amount of 0.1 to 100%; (IV): a content ratio [R1/R2] of a monocyclo paraffin component (R1) to a dicyclo to hexacyclo paraffin component (R2) is 0.70 or less by a volume ratio as measured in accordance with ASTM D2786; and (V): a % CA is less than 1.0.
Inventors:
Kasai Moritsugu
Norihiro Kuroda
Norihiro Kuroda
Application Number:
JP2016245997A
Publication Date:
August 11, 2021
Filing Date:
December 19, 2016
Export Citation:
Assignee:
IDEMITSU KOSAN CO.,LTD.
International Classes:
C10M101/02
Domestic Patent References:
| JP2008013681A | ||||
| JP2008013684A | ||||
| JP2007270059A | ||||
| JP2010090251A | ||||
| JP2006519910A | ||||
| JP6047224B1 |
Foreign References:
| WO2013147302A1 | ||||
| WO2013147305A1 |
Attorney, Agent or Firm:
Tamotsu Otani
Yoshio Takizawa
Toshihide Ishihara
Yoshio Takizawa
Toshihide Ishihara