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:
Feb. 25, 2003
Filed:
Apr. 21, 2000
Applicant:
Inventors:
Toshiyuki Hayakawa, Tokyo, JP;
Fumio Tutumi, Tokyo, JP;
Assignee:
JSR Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08F 4/68 ;
U.S. Cl.
CPC ...
C08F 4/68 ;
Abstract
Olefins are homopolymerized or copolymerized in the presence of a catalyst containing a reaction product obtained from vanadium oxytrichloride and 2,2′-thiobis(6-t-butyl-4-methylphenyl), an organic aluminum compound, such as trimethylaluminum, and an ionized ionic compound, such as N,N-dimethylanilinium tetrakis(pentafluorophenyl)borate, and the like. By using this catalyst to polymerize ethylene with an &agr;-olefin, such as propylene, 1-heptene, 1-octene, and the like, or a non-conjugated diene, such as 5-ethylidene-2-norbomene, and the like, a polymer having a high degree of copolymerization is obtained.