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:
May. 21, 2013
Filed:
Oct. 16, 2009
Bill Gustafsson, Stenungsund, SE;
Jari Hatonen, Porvoo, FI;
Petri Rekonen, Porvoo, FI;
Markku Vahteri, Porvoo, FI;
Siw Bodil Fredriksen, Skien, NO;
Arild Follestad, Stathelle, NO;
Karl Isak Skau, Tangenvelen, NO;
Bill Gustafsson, Stenungsund, SE;
Jari Hatonen, Porvoo, FI;
Petri Rekonen, Porvoo, FI;
Markku Vahteri, Porvoo, FI;
Siw Bodil Fredriksen, Skien, NO;
Arild Follestad, Stathelle, NO;
Karl Isak Skau, Tangenvelen, NO;
Borealis AG, Vienna, AT;
Abstract
The present inventions relates to a process for producing polyethylene compositions comprising polymerizing polyethylene resins in a cascaded multi-stage reaction in which the reaction steps are performed in at least two slurry phase reactors (A) and (B) and at least one gas phase reactor (C) which are arranged in series in any order wherein in reactor (A) a low molecular weight ethylene homo- or copolymer fraction having a MFRof 100 to 2000 g/10 min, in reactor (B) a low molecular weight ethylene homo- or copolymer fraction having an MFRof 100 to 2000 g/10 min, and in reactor (C) a high molecular weight ethylene copolymer fraction are polymerized, and further comprising a compounding step after polymerization, wherein the final polyethylene composition has a MFRof 3 to 50 g/10 min, the melt flow rates being determined according to ISO 1133.