Title:
LUBRICATING OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2021/039818
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a lubricating oil composition that has a higher viscosity index (viscosity being less temperature dependent), and excellent low-temperature viscosity characteristics. The present invention pertains to a lubricating oil composition containing a resin (A) and a base oil (B), and is characterized in that the resin (A) satisfies requirements (A-1) to (A-3), the base oil (B) satisfies a requirement (B-1), and the content ratio of the resin (A) and the base oil (B) is such that the resin (A) falls within the range of 0.01-50 parts by mass, where the sum of the resin (A) and the base oil (B) is 100 parts by mass. (A-1) A polymer containing 60-99 mol% of a constituent unit derived from 4-methyl-1-pentene and 1-40 mol% of a constituent unit derived from an α-olefin (excluding 4-methyl-1-pentene) having 2-20 carbon atoms (where the sum of 4-methyl-1-pentene and the α-olefin is 100 mol%). (A-2) A limiting viscosity [η] as measured in decalin at 135°C is in the range of 0.01-5.0 dl/g. (A-3) A melting point (Tm) as measured by differential scanning calorimetry (DSC) is in the range of 110-150°C. (B-1) A kinematic viscosity at 100°C is in the range of 1-50 mm2/s.
Inventors:
HAYAKAWA AKIO (JP)
YAMAMOTO SHUHEI (JP)
UDAGAWA AKIHIRO (JP)
YAMASHITA MASAHIRO (JP)
SAITO YUSUKE (JP)
YAMAMOTO SHUHEI (JP)
UDAGAWA AKIHIRO (JP)
YAMASHITA MASAHIRO (JP)
SAITO YUSUKE (JP)
Application Number:
PCT/JP2020/032111
Publication Date:
March 04, 2021
Filing Date:
August 26, 2020
Export Citation:
Assignee:
MITSUI CHEMICALS INC (JP)
International Classes:
C10M101/02; C10M105/02; C10M107/02; C10M143/08; C10N20/02; C10N30/02; C10N40/25
Domestic Patent References:
| WO2018124070A1 | 2018-07-05 | |||
| WO2000060032A1 | 2000-10-12 | |||
| WO2000034420A1 | 2000-06-15 | |||
| WO2000034420A1 | 2000-06-15 | |||
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| WO2006025540A1 | 2006-03-09 | |||
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Other References:
See also references of EP 4023737A4
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
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