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:
Mar. 15, 2011
Filed:
Apr. 17, 2007
Hisashi Ohtaki, Yokohama, JP;
Naoshi Iwama, Yokkaichi, JP;
Masami Kashimoto, Yokohama, JP;
Tomohiro Kato, Yokohama, JP;
Tsutomu Ushioda, Yokkaichi, JP;
Hisashi Ohtaki, Yokohama, JP;
Naoshi Iwama, Yokkaichi, JP;
Masami Kashimoto, Yokohama, JP;
Tomohiro Kato, Yokohama, JP;
Tsutomu Ushioda, Yokkaichi, JP;
Japan Polypropylene Corporation, Tokyo, JP;
Abstract
Disclosed is a novel transition metal compound which is used for forming a metallocene catalyst for olefin polymerization. Specifically disclosed is a novel transition metal compound represented by the general formula below which enables to form a metallocene catalyst that has a balanced reactivity with ethylene and a comonomer selected from α-olefins having 3-20 carbon atoms and enables to produce an α-olefin polymer having a high molecular weight. Also specifically disclosed are a catalyst for olefin polymerization containing such a transition metal compound, and a method for producing a propylene/ethylene-α-olefin block copolymer wherein such a catalyst is used.