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. 21, 2002
Filed:
Feb. 03, 2000
Applicant:
Inventors:
Yoshiki Ishino, Tokyo, JP;
Satoshi Nakayama, Tokyo, JP;
Yoshihiro Mori, Tokyo, JP;
Iwakazu Hattori, Tokyo, JP;
Assignee:
JSR Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 4/44 ;
U.S. Cl.
CPC ...
C08F 4/44 ;
Abstract
A conjugated diene polymer is produced by continuously polymerizing a conjugated diene monomer with a catalyst consisting essentially of components (1): a lanthanoid compound, (2): an aluminoxane and (3): a halogenated organometal compound, a halogenated metal compound or a halogenated organic compound in a hydrocarbon solvent containing 5-50% by weight of an aromatic hydrocarbon to obtain a conjugated diene polymer having a ratio (Mw/Mn) of weight average molecular weight (Mw) to number average molecular weight (Mn) of not more than 4.