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:
Nov. 05, 1996
Filed:
Feb. 01, 1996
Applicant:
Inventors:
Makoto Jimbo, Kawasaki, JP;
Mamoru Yoshikawa, Kawasaki, JP;
Shinjiro Suga, Kawasaki, JP;
Yoshihisa Yamaguchi, Kawasaki, JP;
Masahiro Niwa, Yokohama, JP;
Eiko Kobayashi, Yokosuka, JP;
Kunimichi Kubo, Tokyo, JP;
Assignee:
Nippon Petrochemicals Company, Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
526 74 ; 526 78 ; 526 79 ; 526 88 ; 526116 ; 526901 ;
Abstract
In the polymerization of olefins with a vapor phase fluidized bed reactor, the improvement comprises the steps of feeding seed polymer particles and the reaction is then started after feeding an organoaluminum compound on a prescribed basis, thereby avoiding the formation of sheet-like polymer in the initial period of the reaction and the lowering of the bulk density of the product polymer.