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:
Jan. 15, 2002
Filed:
Jul. 13, 1999
Applicant:
Inventors:
Sirpa Ala Huikku, Helsinki, FI;
Thomas Garoff, Helsinki, FI;
Timo Leinonen, Tolkkinen, FI;
Ali Harlin, Vantaa, FI;
Fred Bergmann, Langesund, NO;
Assignee:
Borealis A/S, Lyngby, DK;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
C08F / ;
Abstract
A process for homo or copolymerizing propylene, wherein propylene is polymerized in the presence of a catalyst at an elevated temperature in a reaction medium, in which a major part is formed by propylene. The polymerization is carried in at least one slurry reactor in the presence of liquid propylene at a temperature between 80° C. and the critical temperature of the reaction medium and a catalyst system producing within said temperature range a high productivity and essentially constant isotacticity within wide melt index range.