Title:
VISCOSITY INDEX IMPROVER COMPOSITION AND LUBRICATING OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2023/238603
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a viscosity index improver composition that will not easily develop into a gel. The present invention pertains to a viscosity index improver composition comprising: a copolymer (A) containing, as essential constituent monomers, a polyolefin-based monomer (a) represented by general formula (1) and a (meth)acrylic acid alkyl ester (b) having a C1-C4 alkyl group; and a Fischer-Tropsch derived base oil (B) having a kinematic viscosity at 100°C of 4.0 mm2/s or less. Based on the total weight of the monomers constituting the copolymer (A), the content of the monomer (a) is 1-20 wt% and the content of the (meth)acrylic acid alkyl ester (b) is 45-85 wt%.
Inventors:
TAKENOSHITA YUICHI (JP)
MATSUMOTO SATOSHI (JP)
UENO KAZUSHI (JP)
YAMAZAKI KENJI (JP)
YAMASHITA HIROKI (JP)
MATSUMOTO SATOSHI (JP)
UENO KAZUSHI (JP)
YAMAZAKI KENJI (JP)
YAMASHITA HIROKI (JP)
Application Number:
PCT/JP2023/018073
Publication Date:
December 14, 2023
Filing Date:
May 15, 2023
Export Citation:
Assignee:
SANYO CHEMICAL IND LTD (JP)
International Classes:
C10M101/02; C10M145/14; C10M105/04; C10M105/32; C10M107/02; C10M149/06; C10N20/00; C10N20/02; C10N20/04; C10N30/00; C10N40/04; C10N40/06; C10N40/08; C10N40/25
Domestic Patent References:
| WO2018174188A1 | 2018-09-27 |
Foreign References:
| JP2022022996A | 2022-02-07 | |||
| JP2019532134A | 2019-11-07 | |||
| JP2022120328A | 2022-08-18 |
Attorney, Agent or Firm:
WISEPLUS IP FIRM (JP)
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