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:
Dec. 27, 2011
Filed:
Jan. 11, 2010
Michinori Suzuki, Chiba, JP;
Masato Murakami, Chiba, JP;
Naomi Okamoto, Chiba, JP;
Mitsuharu Eikyuu, Chiba, JP;
Kouji Ishiguchi, Chiba, JP;
Michinori Suzuki, Chiba, JP;
Masato Murakami, Chiba, JP;
Naomi Okamoto, Chiba, JP;
Mitsuharu Eikyuu, Chiba, JP;
Kouji Ishiguchi, Chiba, JP;
Ube Industries, Ltd., , JP;
Abstract
A catalyst for polymerization of conjugated diene is provided, which facilitates manufacture of a conjugated diene polymer with a high 1,4-cis structure content, leaves less aluminum residue on polymerization, and has high activity. A method of manufacturing conjugated diene polymers using the catalyst is also provided. A catalyst for polymerization of conjugated diene comprises (A) an yttrium compound; (B) an ionic compound including a non-coordinate anion and a cation; and (C) an organometallic compound including an element selected from the groups 2, 12 and 13 of the periodic table.