Title:
VISCOSITY INDEX IMPROVER COMPOSITION AND LUBRICATING OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2023/167037
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a viscosity index improver composition which contains a comb-shaped copolymer and has a low local maximum point of viscosity within the range of 40°C to 100°C, while having excellent handling properties. The present invention relates to: a viscosity index improver composition which contains a (co)polymer (A) that comprises a polyolefin monomer (a) represented by general formula (1) as an essential constituent monomer and a GTL oil (B) that has a kinematic viscosity at 100°C of 1.0 to 2.6 mm2/s; a lubricating oil composition which contains this viscosity index improver composition and at least one additive that is selected from the group consisting of a detergent, a dispersant, an antioxidant, an oiliness improver, a pour point depressant, a friction/wear regulator, an extreme-pressure additive, an antifoaming agent, a demulsifier, a metal deactivation agent and a corrosion inhibitor; and the like.
Inventors:
YAMAZAKI KENJI (JP)
MATSUMOTO SATOSHI (JP)
TAKENOSHITA YUICHI (JP)
UENO KAZUSHI (JP)
KUWATA YOSHIYUKI (JP)
YAMASHITA HIROKI (JP)
MATSUMOTO SATOSHI (JP)
TAKENOSHITA YUICHI (JP)
UENO KAZUSHI (JP)
KUWATA YOSHIYUKI (JP)
YAMASHITA HIROKI (JP)
Application Number:
PCT/JP2023/006006
Publication Date:
September 07, 2023
Filing Date:
February 20, 2023
Export Citation:
Assignee:
SANYO CHEMICAL IND LTD (JP)
International Classes:
C10M161/00; C10M127/02; C10M145/14; C10M149/10; C10N20/00; C10N20/02; C10N20/04; C10N30/02; C10N40/25
Domestic Patent References:
| WO2018174188A1 | 2018-09-27 | |||
| WO2022039266A1 | 2022-02-24 |
Foreign References:
| JP2022022992A | 2022-02-07 | |||
| JP2017031400A | 2017-02-09 | |||
| JP2014224243A | 2014-12-04 | |||
| JP2020105347A | 2020-07-09 |
Attorney, Agent or Firm:
WISEPLUS IP FIRM (JP)
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