Title:
VISCOSITY INDEX IMPROVER COMPOSITION AND LUBRICATING OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2024/004763
Kind Code:
A1
Abstract:
This viscosity index improver composition for a lubricating oil composition containing a phosphate ester (C), the viscosity index improver composition containing: a (co)polymer (A) having a monomer (a) represented by general formula (1) as an essential constituent monomer; and a chain aliphatic alcohol (B) having an HLB value of 2.5 to 7.0, wherein the (co)polymer (A) has a solubility parameter of 9.00 to 9.80 (cal/cm3)1/2. (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 is a C1-17 linear or branched alkyl group; p is an integer of 0–20; and when p is 2 or greater, R2 may be the same or different.)
Inventors:
NAITO NOBUHIRO (JP)
KIGUCHI SHINNOSUKE (JP)
TORII NAOHIRO (JP)
OGATA KAZUKI (JP)
SUGIYAMA YOSHIMITSU (JP)
KIGUCHI SHINNOSUKE (JP)
TORII NAOHIRO (JP)
OGATA KAZUKI (JP)
SUGIYAMA YOSHIMITSU (JP)
Application Number:
PCT/JP2023/022777
Publication Date:
January 04, 2024
Filing Date:
June 20, 2023
Export Citation:
Assignee:
SANYO CHEMICAL IND LTD (JP)
International Classes:
C10M169/04; C10M105/74; C10M129/06; C10M145/14; C10M149/06; C10N20/02; C10N20/04; C10N30/02; C10N40/08
Domestic Patent References:
| WO2022039266A1 | 2022-02-24 |
Foreign References:
| JPH1077494A | 1998-03-24 | |||
| JP2009503142A | 2009-01-29 | |||
| JP2008546871A | 2008-12-25 | |||
| JP2002529577A | 2002-09-10 | |||
| JP2003524673A | 2003-08-19 | |||
| JP2016017170A | 2016-02-01 |
Attorney, Agent or Firm:
WISEPLUS IP FIRM (JP)
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