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:
Jan. 28, 2025
Filed:
Oct. 09, 2023
Applicant:
Nova Chemicals (International) S.a., Fribourg, CH;
Inventors:
Qinyan Wang, Calgary, CA;
XiaoChuan Wang, Calgary, CA;
Peter Zoricak, Calgary, CA;
Steven Clemens, Calgary, CA;
Brian Molloy, Airdrie, CA;
Assignee:
NOVA Chemicals (International) S.A., Fribourg, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 210/02 (2006.01); C08F 2/06 (2006.01); C08F 4/642 (2006.01); C08F 4/659 (2006.01); C08F 4/6592 (2006.01); C08F 232/04 (2006.01); C08L 23/08 (2006.01);
U.S. Cl.
CPC ...
C08L 23/0823 (2013.01); C08F 2/06 (2013.01); C08F 4/6428 (2013.01); C08F 4/65908 (2013.01); C08F 4/65927 (2013.01); C08F 210/02 (2013.01); C08F 232/04 (2013.01); C08L 2314/06 (2013.01);
Abstract
The copolymerization of ethylene with a cyclic mono olefin (such as norbornene) is conducted in the presence of a catalyst system comprising a bridged hafnocene catalyst and a three part activator. The catalyst system provides excellent activity at high polymerization temperatures. Copolymers produced according to this invention have unique microstructure (with methyl branching being observed) and unique rheology.