Title:
CYCLIC OLEFIN COPOLYMER PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/204187
Kind Code:
A1
Abstract:
The objective of the invention is to provide a cyclic olefin copolymer production method capable of producing a cyclic olefin copolymer having a low glass transition temperature (Tg) and excellent processability, while suppressing the generation of polyethylene-like impurities even when polymerizing monomers comprising norbornene monomers and ethylene under a high ethylene loading pressure condition wherein the polyethylene-like impurities are generated readily. In this method, when polymerizing monomers comprising norbornene monomers and ethylene in the presence of a metallocene catalyst at an ethylene loading pressure of 0.5 MPa or higher, a metallocene catalyst is used, comprising a ligand containing a cyclopentadiene ring, and a structure wherein a heteroatom, which is N, O, S, or P, is bound to a transition metal from group IV of the periodic table and to an sp2 carbon.
Inventors:
TADA TOMOYUKI (JP)
WAKITANI NAOYUKI (JP)
KOMATSU HIROYUKI (JP)
WAKITANI NAOYUKI (JP)
KOMATSU HIROYUKI (JP)
Application Number:
PCT/JP2020/015410
Publication Date:
October 08, 2020
Filing Date:
April 03, 2020
Export Citation:
Assignee:
POLYPLASTICS CO (JP)
International Classes:
C08F4/6592; C08F210/02; C08F210/14
Foreign References:
| JPH072917A | 1995-01-06 | |||
| JP2000038421A | 2000-02-08 | |||
| CN110272515A | 2019-09-24 |
Other References:
PATRICK FOSTER ET AL.: "The synthesis and polymerization behavior of methoxy-substituted (indenyl)trichlorotitanium complexes", JOURNAL OF ORGANOMETALLIC CHEMISTRY, vol. 527, 1997, pages 71 - 74, XP004014580, DOI: 10.1016/S0022-328X(96)06625-9
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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