Title:
A viscosity index improver and a lubricating oil composition
Document Type and Number:
Japanese Patent JP6060311
Kind Code:
B2
Abstract:
The present invention aims to provide a viscosity index improver excellent in shear stability and having a low HTHS viscosity and a high viscosity index. The viscosity index improver of the present invention contains a (co)polymer (A) containing a polyolefin-based monomer as an essential monomer unit, and a base oil, wherein the absolute value of difference in solubility parameter between the (co) polymer (A) and the base oil is 0.8 to 2.0 (cal/cm 3 ) 1/2 .
Inventors:
Nakakuni
Ayumu Sakaguchi
Ryumi Takenori
Hiroki Yamashita
Ayumu Sakaguchi
Ryumi Takenori
Hiroki Yamashita
Application Number:
JP2016505254A
Publication Date:
January 11, 2017
Filing Date:
February 25, 2015
Export Citation:
Assignee:
SANYO CHEMICAL INDUSTRIES,LTD.
International Classes:
C10M149/10; C10M153/02
Domestic Patent References:
| JPH08169922A | 1996-07-02 | |||
| JP2013133460A | 2013-07-08 | |||
| JP2013147608A | 2013-08-01 | |||
| JPH08169922A | 1996-07-02 |
Attorney, Agent or Firm:
Atomi International Patent Office