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:
Aug. 29, 2017
Filed:
Apr. 22, 2014
Borealis Ag, Vienna, AT;
Abu Dhabi Polymers Co. Ltd (Borouge) L.l.c., Abu Dhabi, AE;
Kauno Alastalo, Porvoo, FI;
Pauli Leskinen, Helsinki, FI;
Cristian Hedesiu, Abu Dhabi, AE;
Johanna Lilja, Kirkkokatu, FI;
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 three polymerization stages. The polymer produced in the first polymerization stage has the highest melt flow rate and the lowest content of comonomer. The polymer produced in the last polymerization stage has the lowest melt flow rate and the highest content of comonomer. The polymer composition produced by the process has good mechanical properties and can be used for making pipes. The process has a good productivity.