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. 05, 2009
Filed:
Jun. 29, 2007
Yasushi Nakayama, Sodegaura, JP;
Hideki Bando, Sodegaura, JP;
Yoshiho Sonobe, Sodegaura, JP;
Makoto Mitani, Sodegaura, JP;
Terunori Fujita, Sodegaura, JP;
Yasushi Nakayama, Sodegaura, JP;
Hideki Bando, Sodegaura, JP;
Yoshiho Sonobe, Sodegaura, JP;
Makoto Mitani, Sodegaura, JP;
Terunori Fujita, Sodegaura, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
Solid fine particles which contain a magnesium atom, an aluminum atom and a Calkoxy group simultaneously, are insoluble in a hydrocarbon solvent, and have an average particle diameter of 3 to 80 μm, and an olefin polymerization catalyst containing the solid fine particles and a transition metal compound in the groups 3 to 11 in the periodic table, exhibit a very high olefin polymerization activity without combination with an expensive organoaluminum oxy compound or organoboron compound and maintains a high activity in polymerization for a long time, and an olefin polymer excellent in powdery properties can be produced by using the olefin polymerization catalyst. The transition metal compound in the groups 3 to 11 in the periodic table includes a transition metal compound having a ligand containing two or more atoms selected from a boron atom, a nitrogen atom, an oxygen atom, a phosphorus atom and a sulfur atom.