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:
Apr. 24, 2018
Filed:
Dec. 12, 2014
Applicant:
Borealis Ag, Vienna, AT;
Inventors:
Ravindra Tupe, Helsinki, FI;
Jani Aho, Helsinki, FI;
Markku Vahteri, Porvoo, FI;
Tuomas Noopila, Helsinki, FI;
Jarmo Kela, Porvoo, FI;
Assignee:
BOREALIS AG, Vienna, AT;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08L 23/08 (2006.01); C08F 210/16 (2006.01); C08F 4/02 (2006.01);
U.S. Cl.
CPC ...
C08L 23/0815 (2013.01); C08F 210/16 (2013.01); C08F 4/025 (2013.01); C08L 2205/025 (2013.01);
Abstract
The present invention is a process for producing low density copolymers of ethylene and alpha-olefins having from 4 to 10 carbon atoms in three polymerization stages in the presence of an olefin polymerization catalyst 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 density of not more than 920 kg/m.