Title:
VISCOSITY INDEX IMPROVER COMPOSITION AND LUBRICATING OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2022/039266
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a viscosity index improver composition having an excellent viscosity index improving effect and being capable of obtaining a lubricating oil composition having an excellent defoaming property and excellent defoaming-property persistence. The present invention relates inter alia, to a viscosity index improver composition that contains a (co)polymer (A) having a monomer (a) represented by general formula (1) as an essential monomer, a C18-40 chain aliphatic alcohol (B), and a base oil. (R1 is a hydrogen atom or a methyl group; –X1– is a group represented by –O– or –NH–; R2 is a C2-4 alkylene group; R3 and R4 are each independently a C8-24 linear or branched alkyl group; p is an integer of 0–20; and when p is 2 or higher, R2 may be the same or different.)
Inventors:
NAITO NOBUHIRO (JP)
YAMASHITA HIROKI (JP)
YOSHIDA KENYUU (JP)
HAGIHARA HIROKI (JP)
YAMASHITA HIROKI (JP)
YOSHIDA KENYUU (JP)
HAGIHARA HIROKI (JP)
Application Number:
PCT/JP2021/030641
Publication Date:
February 24, 2022
Filing Date:
August 20, 2021
Export Citation:
Assignee:
SANYO CHEMICAL IND LTD (JP)
International Classes:
C10M161/00; C10M129/06; C10M129/90; C10M145/14; C10N20/02; C10N20/04; C10N30/02; C10N30/18; C10N40/04; C10N40/06; C10N40/08; C10N40/25
Domestic Patent References:
| WO2017122721A1 | 2017-07-20 | |||
| WO2018101342A1 | 2018-06-07 |
Foreign References:
| JP2018048328A | 2018-03-29 | |||
| JP2013203849A | 2013-10-07 | |||
| JP2009536685A | 2009-10-15 | |||
| JP2019156953A | 2019-09-19 | |||
| JP2018016798A | 2018-02-01 | |||
| JP2020164497A | 2020-10-08 |
Attorney, Agent or Firm:
YASUTOMI & ASSOCIATES (JP)
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