Title:
METHOD FOR PRODUCING COPOLYMER
Document Type and Number:
WIPO Patent Application WO/2020/255761
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a method for producing a copolymer, wherein the amount of crystals and the amount of vinyl bonds (or a glass transition temperature) can be controlled. The solution for the problem is a method for producing a copolymer, the method being characterized by comprising the step of copolymerizing ethylene and isoprene in the presence of a polymerization catalyst composition containing a half-metallocene cation complex represented by general formula (I) (wherein M represents a lanthanide element, scandium, or yttrium; CpR' represents a substituted cyclopentadienyl group, a substituted indenyl group or a substituted fluorenyl group each having at least two substituents; X represents a hydrogen atom, a halogen atom, an alkoxy group, a thiolate group, an amide group, a silyl group, or a monovalent hydrocarbon group having 1 to 20 carbon atoms; L represents a neutral Lewis base; w represents an integer from 0 to 3; and [B]- represents a non-coordinating anion).
Inventors:
TAKANO SHIGENAGA (JP)
TARDIF OLIVIER (JP)
KAITA SHOJIRO (JP)
TARDIF OLIVIER (JP)
KAITA SHOJIRO (JP)
Application Number:
PCT/JP2020/022421
Publication Date:
December 24, 2020
Filing Date:
June 05, 2020
Export Citation:
Assignee:
BRIDGESTONE CORP (JP)
International Classes:
C08F10/00; C08F4/54; C08F4/60
Foreign References:
| JP2012131965A | 2012-07-12 | |||
| JP2013155359A | 2013-08-15 | |||
| JP2016210940A | 2016-12-15 |
Other References:
See also references of EP 3988583A4
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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