The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 15, 2018
Filed:
Feb. 10, 2015
Mitsui Chemicals, Inc., Tokyo, JP;
Koji Endo, Chiba, JP;
Mayumi Hiwara, Chiba, JP;
Sadahiko Matsuura, Iwakuni, JP;
Yoko Kosugi, Ichihara, JP;
Yuichi Yamamura, Ichihara, JP;
Yusuke Mizobuchi, Ichihara, JP;
MITSUI CHEMICALS, INC., Tokyo, JP;
Abstract
A process capable of producing an ethylene/α-olefin copolymer having a high molecular weight even under the conditions of a high polymerization temperature is provided. The process for producing an ethylene/α-olefin copolymer includes copolymerizing ethylene and an α-olefin having 3 or more carbon atoms in the presence of an olefin polymerization catalyst including a crosslinked metallocene compound (A) represented by the following general formula [I] and a cocatalyst component (B). In the general formula [I], Y is selected from a carbon atom, etc., M is a hafnium atom or the like, Rto Rare each selected from a hydrogen atom, a hydrocarbon group, etc., Rand Rare each a substituted aryl group or the like, at least one of Rand Ris a substituted aryl group having one or more electron-donating substituents having a Hammett substituent constant σ of not more than −0.2, Q is selected from a halogen atom, etc., and j is an integer of 1 to 4.