METHOD FOR PRODUCING COPOLYMER, COPOLYMER, RUBBER COMPOSITION, AND TIRE

Title:

METHOD FOR PRODUCING COPOLYMER, COPOLYMER, RUBBER COMPOSITION, AND TIRE

Document Type and Number:

WIPO Patent Application WO/2019/044827

Kind Code:

A1

Abstract:

The purpose of the present invention is to provide a method for producing a copolymer capable of obtaining at high yield a copolymer having a high cis-1,4-bond content of the conjugated diene moiety even when a cyclic olefin compound is used as a monomer. To achieve the above purpose, the present invention is characterized by being provided with a step that polymerizes a conjugated diene compound and a cyclic olefin compound in the presence of a catalyst composition including at least one compound selected from the group consisting of rare earth element compounds represented by formula (I), ionic compounds, and halogen compounds, a compound represented by formula (II), and a coordination compound capable of serving as a ligand. M-(AQ1) (AQ2) (AQ3) ···(I) YR1 aR2 bR3 c···(II)

Inventors:

TAKANO SHIGENAGA (JP)
KAITA SHOJIRO (JP)
TARDIF OLIVIER (JP)

Application Number:

PCT/JP2018/031762

Publication Date:

March 07, 2019

Filing Date:

August 28, 2018

Export Citation:

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Assignee:

BRIDGESTONE CORP (JP)

International Classes:

C08F236/04; C08F4/54; C08F4/6192

Domestic Patent References:

WO2016027401A1	2016-02-25
WO2017203830A1	2017-11-30
WO2012014455A1	2012-02-02

Foreign References:

JP2008280384A	2008-11-20
JP2008266523A	2008-11-06
JP2008001742A	2008-01-10
JP2013035943A	2013-02-21
JP2008031270A	2008-02-14
JP2006503141A	2006-01-26

Other References: