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:
Apr. 28, 2020
Filed:
May. 06, 2019
Ube Industries, Ltd., Ube-shi, JP;
Koji Shiba, Ichihara, JP;
Masato Murakami, Ichihara, JP;
Michinori Suzuki, Ichihara, JP;
Naomi Okamoto, Ichihara, JP;
Mitsuharu Anbe, Ichihara, JP;
Masahiro Tanaka, Ichihara, JP;
Ube Industries, Ltd., Ube-shi, JP;
Abstract
A method for producing a conjugated diene polymer having a high content of cis-1,4-structures with a high activity, a conjugated diene polymer, and a modified conjugated diene polymer. The catalyst for conjugated diene polymerization in the method includes: a non-metallocene type gadolinium compound (A) represented by the general formula (1); an ionic compound (B) formed of a non-coordinating anion and a cation; and an organic metal compound (C) of an element selected from the group consisting of a group 2, a group 12, and a group 13 of the periodic table.