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:
Jul. 18, 2023
Filed:
May. 07, 2019
Applicant:
Borealis Ag, Vienna, AT;
Inventors:
Noureddine Ajellal, Porvoo, FI;
Ville Virkkunen, Porvoo, FI;
Assignee:
BOREALIS AG, Vienna, AT;
Primary Examiner:
Int. Cl.
CPC ...
C08F 210/16 (2006.01); C08F 4/64 (2006.01); C08F 10/06 (2006.01); C08F 4/642 (2006.01);
U.S. Cl.
CPC ...
C08F 10/06 (2013.01); C08F 4/64003 (2013.01); C08F 4/6428 (2013.01); C08F 210/16 (2013.01); C08F 2420/07 (2021.01); C08F 2500/03 (2013.01); C08F 2500/12 (2013.01); C08F 2500/17 (2013.01); C08F 2500/18 (2013.01); C08L 2207/02 (2013.01);
Abstract
The present invention relates to a process for producing a propylene polymer, such as a propylene homopolymer, a propylene-ethylene random copolymer or a heterophasic propylene copolymer using a specific class of metallocene complexes in combination with a cocatalyst system comprising a boron containing cocatalyst and an aluminoxane cocatalyst, preferably in a multistage polymerization process including a gas phase polymerization step.