公开(公告)号：US20230391906A1

公开(公告)日：2023-12-07

申请号：US18247420

申请日：2021-09-16

Applicant: Polyplastics Co., Ltd.

Inventor： Tomoyuki Tada ,  Naoyuki Wakitani ,  Hiroyuki Komatsu

IPC: C08F210/02 ,  C08F4/6592

CPC classification number: C08F210/02 ,  C08F4/6592

Abstract: A production method for a cyclic olefin copolymer which is capable of efficiently producing a cyclic olefin copolymer by copolymerizing monomers including a norbornene monomer and ethylene while suppressing the formation of a polyethylene-like impurity. The monomers including a norbornene monomer and ethylene are polymerized in the presence of a metallocene catalyst containing a cyclopentadiene ligand which is substituted with an alkyl group optionally substituted with a halogen atom, or a trialkylsilyl group, and satisfies specific conditions for substituent(s).