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Title:
LUBRICATING OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2023/054440
Kind Code:
A1
Abstract:
The purpose of the present invention is to obtain a lubricating oil composition that has particularly excellent viscosity characteristics at a temperature of as low as -35°C and thus ensures a viscosity required at high temperature, that inhibits an increase in low-temperature viscosity, and that also has excellent storage stability in a low-temperature environment. The present invention pertains to a lubricating oil composition containing a copolymer (A) and a base oil (B), and characterized in that the copolymer (A) satisfies requirement (a-1), and the content ratio of the copolymer (A) and the base oil (B) is such that the copolymer (A) is contained in a range of 0.1-50 parts by mass with respect to a total of 100 parts by mass of the copolymer (A) and the base oil (B). (a-1) The copolymer (A) is formed between 4-methyl-1-pentene and an α-olefin having 20 or more carbon atoms but excluding 4-methyl-1-pentene, and contains not less than 1 mol% but less than 30 mol% of a structural unit derived from 4-methyl-1-pentene with respect to all structural units.

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Inventors:
UEKUSA TAKAYUKI (JP)
INOMATA KIYOHIDE (JP)
UDAGAWA AKIHIRO (JP)
YAMAMOTO SHUHEI (JP)
Application Number:
PCT/JP2022/036093
Publication Date:
April 06, 2023
Filing Date:
September 28, 2022
Export Citation:
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Assignee:
MITSUI CHEMICALS INC (JP)
International Classes:
C10M169/04; C10M143/04; C10M143/08; C10M101/02; C10N30/00; C10N30/02; C10N40/04; C10N40/25; C10N40/26
Domestic Patent References:
WO2018124070A12018-07-05
WO2021039818A12021-03-04
WO2018124070A12018-07-05
WO2001053369A12001-07-26
WO2001027124A12001-04-19
WO2014050817A12014-04-03
WO2001056968A12001-08-09
Foreign References:
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JP2013506036A2013-02-21
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Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
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