Title:
METHOD FOR PRODUCING CYCLOOLEFIN COPOLYMER
Document Type and Number:
WIPO Patent Application WO/2022/070958
Kind Code:
A1
Abstract:
A method for producing a cycloolefin copolymer is provided by which the cycloolefin copolymer can be efficiently produced by copolymerizing monomers comprising a norbornene monomer and ethylene while inhibiting the formation of polyethylene-like impurities. Monomers comprising a norbornene monomer and ethylene are polymerized in the presence of both a metal-containing catalyst having a specific structure and an organic solvent including a halogenated hydrocarbon. The content of the halogenated hydrocarbon in the organic solvent is preferably 0.01-5 vol% in terms of volume proportion at 20°C.
Inventors:
WAKITANI NAOYUKI (JP)
TADA TOMOYUKI (JP)
TADA TOMOYUKI (JP)
Application Number:
PCT/JP2021/034138
Publication Date:
April 07, 2022
Filing Date:
September 16, 2021
Export Citation:
Assignee:
POLYPLASTICS CO (JP)
International Classes:
C08F232/08; C08F4/6592; C08F210/02
Domestic Patent References:
| WO2020204187A1 | 2020-10-08 |
Foreign References:
| CN108864348A | 2018-11-23 | |||
| CN108864337A | 2018-11-23 | |||
| CN110387003A | 2019-10-29 | |||
| JP2008081674A | 2008-04-10 |
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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