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:
Jul. 28, 2009
Filed:
Sep. 29, 2004
Makoto Mitani, Sodegaura, JP;
Yasunori Yoshida, Sodegaura, JP;
Junichi Mohri, Sodegaura, JP;
Kazutaka Tsuru, Sodegaura, JP;
Seiichi Ishii, Sodegaura, JP;
Shinichi Kojoh, Sodegaura, JP;
Tomoaki Matsugi, Sodegaura, JP;
Junji Saito, Sodegaura, JP;
Naoto Matsukawa, Sodegaura, JP;
Shigekazu Matsui, Sodegaura, JP;
Takashi Nakano, Sodegaura, JP;
Hidetsugu Tanaka, Sodegaura, JP;
Norio Kashiwa, Sodegaura, JP;
Terunori Fujita, Sodegaura, JP;
Makoto Mitani, Sodegaura, JP;
Yasunori Yoshida, Sodegaura, JP;
Junichi Mohri, Sodegaura, JP;
Kazutaka Tsuru, Sodegaura, JP;
Seiichi Ishii, Sodegaura, JP;
Shinichi Kojoh, Sodegaura, JP;
Tomoaki Matsugi, Sodegaura, JP;
Junji Saito, Sodegaura, JP;
Naoto Matsukawa, Sodegaura, JP;
Shigekazu Matsui, Sodegaura, JP;
Takashi Nakano, Sodegaura, JP;
Hidetsugu Tanaka, Sodegaura, JP;
Norio Kashiwa, Sodegaura, JP;
Terunori Fujita, Sodegaura, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
The present invention provides an olefin polymer having a narrow molecular weight distribution and a specific molecular weight, an olefin polymer having a functional group introduced at the terminal, a tapered polymer containing a segment wherein monomer composition continuously changes in the polymer chain, an olefin polymer having different segments which are bonded to each other, and a process for preparing these polymers. The olefin polymers of the invention are polymers of olefins of 2 to 20 carbon atoms and have a number-average molecular weight of not less than 500 and Mw/Mn of not more than 1.5. In the process for preparing an olefin polymer, an olefin of 2 to 20 carbon atoms is polymerized in the presence of an olefin polymerization catalyst comprising a transition metal compound represented by, for example, the following formula (I):LMX  (I)wherein M is a transition metal atom of Group 3 to Group 11 of the periodic table, m is 1 to 5, n is a number satisfying a valence of M, L is a ligand coordinated to the central metal M and is a ligand containing a heteroatom having no direct bond to the central metal, and X is a halogen atom, a hydrocarbon group or the like.