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. 28, 2000
Filed:
Nov. 26, 1997
Toshiyuki Tsutsui, Yamaguchi, JP;
Ken Yoshitsugu, Yamaguchi, JP;
Masaaki Ohgizawa, Yamaguchi, JP;
Tetsuhiro Matsumoto, Yamaguchi, JP;
Junichi Imuta, Yamaguchi, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
A process for olefin polymerization, including polymerizing or copolymerizing an olefin in the presence of an olefin polymerization catalyst composed of: a fine particle carrier; (A) a transition metal compound of a Group IVB metal of the periodic table, containing a ligand having a cyclopentadienyl skeleton; (B) an aluminoxane compound; and optionally (C) an organoaluminum compound, wherein said aluminoxane compound has an alkyl groups to aluminum ratio of 1.3 to 2.1; said transition metal compound (A) and said organoaluminum oxy-compound (B) and said organoaluminum compound being supported on the fine particle carrier; and said solid catalyst having a bulk density of 0.3 g/cm.sup.3 to 0.5 g/cm.sup.3 and a fluidity index of 45 to 70 and an olefin polymerization process using the olefin polymerization catalyst; and an olefin prepolymerized catalyst obtained by prepolymerizing the catalyst, and an olefin polymerization process using the olefin prepolymerized catalyst. The olefin polymerization process produces a polymer showing excellent particle properties and an olefin polymer which does not stick to the wall of the polymerization reactor.