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:
Jun. 19, 2018
Filed:
Dec. 12, 2014
Applicant:
Borealis Ag, Vienna, AT;
Inventors:
Yi Liu, Engerwitzdorf, AT;
John Jamieson, Linz, AT;
Ravindra Tupe, Helsinki, FI;
Jarmo Kela, Porvoo, FI;
Assignee:
BOREALIS AG, Vienna, AT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 210/16 (2006.01); C08L 23/08 (2006.01); C08F 2/00 (2006.01); C08J 5/18 (2006.01);
U.S. Cl.
CPC ...
C08F 210/16 (2013.01); C08F 2/001 (2013.01); C08J 5/18 (2013.01); C08L 23/0815 (2013.01); C08J 2323/08 (2013.01); C08L 2205/025 (2013.01); C08L 2205/03 (2013.01);
Abstract
The present invention is a process for producing copolymers of ethylene and alpha-olefins having from 4 to 10 carbon atoms in three polymerization stages where a low molecular weight copolymer of ethylene is produced in two of the stages and a high molecular weight copolymer in one of the stages. The resulting copolymers have a low content of extractable material and can be extruded to films which can be used in food contact applications.