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. 07, 2026
Filed:
Jul. 23, 2021
Borealis Ag, Vienna, AT;
Georgy Kipiani, Kulloo, FI;
Jyrki Kauhanen, Kulloo, FI;
Felice De Santis, Linz, AT;
Marja Mustonen, Kulloo, FI;
Matthias Hoff, Linz, AT;
Kalin Simeonov, Linz, AT;
Kimmo Hakala, Helsinki, FI;
Jarkko Hassinen, Kulloo, FI;
Maria Ranieri, Kulloo, FI;
Esko Saikkonen, Kulloo, FI;
Tiina Hämäläinen, Kulloo, FI;
Stefan Pollhammer, Linz, AT;
Pascal Castro, Kulloo, FI;
Irfan Saeed, Kulloo, FI;
Kalle Kallio, Kulloo, FI;
BOREALIS AG, Vienna, AT;
Abstract
The invention provides a process for the preparation of a multimodal ethylene polymer in a multistage process in the presence of a catalyst comprising a complex of formula (Ix) wherein each X is a sigma donor ligand; each Het is independently a monocyclic or multicyclic heteroaromatic or heterocyclic group containing at least one heteroatom selected from O, N or S; L is a carbon, silicon or germanium based divalent bridge in which one or two backbone atoms link the ligands; M is Ti, Zr or Hf; each Ris the same or different and is a linear Calkyl group, or linear Calkoxy, each n is 0 to 3; each Ris the same or different and is a Calkyl group, Calkoxy group or —Si(R)group; each R is the same or different and is Calkyl or phenyl group optionally substituted by 1 to 3 Calkyl groups; and each p is 0 to 3.