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. 24, 2005
Filed:
Feb. 21, 2002
Yasushi Nakayama, Sodegaura, JP;
Hideyuki Kaneko, Sodegaura, JP;
Hideki Bandoh, Sodegaura, JP;
Yoshiho Sonobe, Sodegaura, JP;
Junji Saito, Sodegaura, JP;
Shinichi Kojoh, Sodegaura, JP;
Makoto Mitani, Sodegaura, JP;
Yasuhiko Suzuki, Sodegaura, JP;
Shigekazu Matsui, Sodegaura, JP;
Norio Kashiwa, Sodegaura, JP;
Terunori Fujita, Sodegaura, JP;
Yasushi Nakayama, Sodegaura, JP;
Hideyuki Kaneko, Sodegaura, JP;
Hideki Bandoh, Sodegaura, JP;
Yoshiho Sonobe, Sodegaura, JP;
Junji Saito, Sodegaura, JP;
Shinichi Kojoh, Sodegaura, JP;
Makoto Mitani, Sodegaura, JP;
Yasuhiko Suzuki, Sodegaura, JP;
Shigekazu Matsui, Sodegaura, JP;
Norio Kashiwa, Sodegaura, JP;
Terunori Fujita, Sodegaura, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
A novel olefin polymerization catalyst is provided which comprises (A) a transition metal compound or lanthanoid compound containing two or more atoms selected from the group consisting of boron, nitrogen, oxygen, phosphorus, sulfur, and selenium; and (B) a Lewis acid. A process for producing an olefin polymer is also provided. The catalyst has a high olefin polymerization activity without a combined use of an expensive organoaluminum oxy-compound or organoboron compound, and can maintain the high activity for a long polymerization time.