Title:
共役ジエン系グラフト重合体からなる粘度指数向上剤、及び油組成物
Document Type and Number:
Japanese Patent JP7354293
Kind Code:
B2
Abstract:
Provided are: a new viscosity index improver having higher shear stability; and an oil composition including the viscosity index improver. The viscosity index improver comprises a conjugated diene-based graft polymer, wherein in the conjugated diene-based graft polymer, a side chain (b) comprising a polymer including a structural unit derived from at least one monomer selected from the group consisting of a conjugated diene and an aromatic vinyl compound is bonded, via one tri- or higher-valent heteroatom which serves as a branch point, to a main chain (a) comprising a polymer including a structural unit derived from a conjugated diene, the main chain (a) is bonded, directly or via a linking chain, to the branch point, the side chain (b) is directly bonded to the branch point, and the heteroatom is at least one selected from the group consisting of Si, Sn, Ge, Pb, P, B, and Al.
Inventors:
Seiya Shimizu
Mikio Masuda
Atsushi Inatomi
Junya Takai
Mikio Masuda
Atsushi Inatomi
Junya Takai
Application Number:
JP2021567504A
Publication Date:
October 02, 2023
Filing Date:
December 22, 2020
Export Citation:
Assignee:
KURARAY CO.,LTD.
International Classes:
C10M143/12; C08C19/02; C08C19/25; C08F279/02
Domestic Patent References:
| JP7188360A | ||||
| JP2017513989A | ||||
| JP2002504589A | ||||
| JP2000508375A | ||||
| JP62135506A |
Attorney, Agent or Firm:
Patent Attorney Corporation SS International Patent Office