Title:
VISCOSITY INDEX IMPROVER COMPOSITION AND LUBRICATING OIL COMPOSITION
Document Type and Number:
Japanese Patent JP2017057378
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a viscosity index improver excellent in viscosity index improvement effect, a lubricating oil composition having little viscosity reduction caused by long-term use and excellent in low temperature viscosity and a production method therefor.SOLUTION: There is provided the viscosity index improver composition containing: a copolymer (A) having a monomer (a) represented by formula (1) and (meth)acrylic acid linear alkyl ester (b) having a C1 to 4 linear alkyl group as essential constitutional monomers; and an ester oil base oil having a kinetic viscosity at 100°C of 1.0 to 2.5 mm/s. (1), where Ris H or a methyl group, Xis O or NH, Ris each independently a C2 to 4 linear/branched alkylene group, p is an integer of 0 to 20, a (RO)part may be a random bond or a block bond and Ris a C32 to 44 branched alkyl group.SELECTED DRAWING: None
Inventors:
YOSHIDA KENSUKE
SAKAGUCHI AYUMI
HASHIMOTO HIROKI
SAKAGUCHI AYUMI
HASHIMOTO HIROKI
Application Number:
JP2016165691A
Publication Date:
March 23, 2017
Filing Date:
August 26, 2016
Export Citation:
Assignee:
SANYO CHEMICAL IND LTD
International Classes:
C10M145/14; C08F220/18; C10M105/32; C10M145/00; C10M149/00; C10M153/00; C10M169/04
Domestic Patent References:
JP2013177554A | 2013-09-09 | |||
JP2014152316A | 2014-08-25 | |||
JP2009074068A | 2009-04-09 | |||
JP2013203849A | 2013-10-07 | |||
JPH07508783A | 1995-09-28 | |||
JP2013199549A | 2013-10-03 | |||
JP2010275471A | 2010-12-09 |
Foreign References:
WO2015099907A1 | 2015-07-02 |