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Title:
LUBRICATING OIL COMPOSITION FOR INTERNAL COMBUSTION ENGINES AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2020/194543
Kind Code:
A1
Abstract:
[Problem] To provide a lubricating oil composition for internal combustion engines, which has excellent fluidity in a low temperature environment, while maintaining high shear stability, and which has low agitation resistance with respect to an engine, while exhibiting excellent stability of thermal oxidation resistance. [Solution] A lubricating oil composition for internal combustion engines, which contains a lubricant base oil and a liquid random copolymer of ethylene and an α-olefin, said random copolymer being produced using a specific catalyst, and which is configured such that: the kinematic viscosity at 100°C is 12.5 mm2/s or more but less than 26.1 mm2/s; and the lubricant base oil is composed of a mineral oil that has a kinematic viscosity at 100°C of 2-10 mm2/s, a viscosity index of 95 or more and a pour point of -10°C or less and/or a synthetic oil that has a kinematic viscosity at 100°C of 1-10 mm2/s, a viscosity index of 120 or more and a pour point of -30°C or less.

Inventors:
ABE SHOTA (JP)
Application Number:
PCT/JP2019/012998
Publication Date:
October 01, 2020
Filing Date:
March 26, 2019
Export Citation:
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Assignee:
MITSUI CHEMICALS INC (JP)
International Classes:
C10M169/04; C10M101/02; C10M105/32; C10M143/00; C10M171/02; C10N20/00; C10N20/02; C10N20/04; C10N30/02; C10N30/06; C10N30/10; C10N40/25
Domestic Patent References:
WO2000034420A12000-06-15
WO1997021788A11997-06-19
WO2000015736A22000-03-23
WO2000014188A22000-03-16
WO2000014187A22000-03-16
WO2000014183A12000-03-16
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WO2000008115A12000-02-17
WO1999041332A11999-08-19
WO2001018156A12001-03-15
WO2001057166A12001-08-09
Foreign References:
JP2016098342A2016-05-30
US20150266985A12015-09-24
JP2016098342A2016-05-30
EP2921509A12015-09-23
EP0776959A21997-06-04
EP0668342A11995-08-23
EP1029029A12000-08-23
US3780128A1973-12-18
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JPH01163136A1989-06-27
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KR100551147B12006-02-13
JPH01501950A1989-07-06
JPH03179005A1991-08-05
JPH03179006A1991-08-05
JPH03207703A1991-09-11
JPH03207704A1991-09-11
US5321106A1994-06-14
JP2004051676A2004-02-19
Other References:
TOSOH FINECHEM CORPORATION, TOSOH RESEARCH TECHNOLOGY REVIEW, vol. 47, 2003, pages 55
See also references of EP 3950901A4
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
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