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:
Dec. 03, 2019
Filed:
Apr. 22, 2014
Abu Dhabi Polymers Co. Ltd (Borouge) L.l.c., Abu Dhabi, AE;
Borealis Ag, Vienna, AT;
Kauno Alastalo, Porvoo, FR;
Pauli Leskinen, Helsinki, FI;
Johanna Lilja, Porvoo, FI;
Cristian Hedesiu, Abu Dhabi, AE;
BOREALIS AG, Vienna, AT;
ABU DHABI POLYMERS CO. LTD. (BOROUGE) L.L.C., Abu Dhabi, AE;
Abstract
A process for polymerizing propylene in the presence of a polymerization catalyst by copolymerizing propylene with a comonomer selected from the group of ethylene and C4-C10 alpha-olefins in two polymerization stages. The first polymerization stage is conducted in a loop reactor and the second polymerization stage in a gas phase reactor. The polymer produced in first polymerization stage has a higher melt flow rate and a lower content of comonomer units than the final polymer mixture. The process can be operated with a high throughput and catalyst productivity.