Title:
OIL COMPOSITION AND VISCOSITY INDEX IMPROVER COMPRISING CONJUGATED DIENE-BASED GRAFT POLYMER
Document Type and Number:
WIPO Patent Application WO/2021/132285
Kind Code:
A1
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:
SHIMIZU SEIYA (JP)
MASUDA MIKIO (JP)
INATOMI ATSUSHI (JP)
TAKAI JUNYA (JP)
MASUDA MIKIO (JP)
INATOMI ATSUSHI (JP)
TAKAI JUNYA (JP)
Application Number:
PCT/JP2020/048050
Publication Date:
July 01, 2021
Filing Date:
December 22, 2020
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
C08C19/02; C08C19/25; C08F297/02; C10M143/12; C10M153/02; C10M155/00; C10M155/02; C10M155/04; C10M169/04; C10N30/00; C10N40/04; C10N40/08; C10N40/25
Foreign References:
| JPH07188360A | 1995-07-25 | |||
| JP2017513989A | 2017-06-01 | |||
| JP2002504589A | 2002-02-12 | |||
| JP2000508375A | 2000-07-04 | |||
| JPS62135506A | 1987-06-18 |
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
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