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. 28, 2022
Filed:
May. 29, 2019
Exxonmobil Chemical Patents Inc., Baytown, TX (US);
Subramaniam Kuppuswamy, Mont Belvieu, TX (US);
Matthew W. Holtcamp, Huffman, TX (US);
Matthew S. Bedoya, Humble, TX (US);
Laughlin G. McCullough, League City, TX (US);
ExxonMobil Chemical Patents Inc., Baytown, TX (US);
Abstract
The present disclosure provides bridged metallocene catalyst compounds comprising —Si—Si— bridges, catalyst systems comprising such compounds, and uses thereof. Catalyst compounds of the present disclosure can be hafnium-containing compounds having one or more cyclopentadiene ligand(s) substituted with one or more silyl neopentyl groups and linked with an Si—Si-containing bridge. In another class of embodiments, the present disclosure is directed to polymerization processes to produce polyolefin polymers from catalyst systems comprising one or more olefin polymerization catalysts, at least one activator, and an optional support.