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:
Nov. 23, 2021
Filed:
Mar. 25, 2020
Exxonmobil Chemical Patents Inc., Baytown, TX (US);
John R. Hagadorn, Houston, TX (US);
Jo Ann M. Canich, Houston, TX (US);
Mikhail I. Sharikov, Moscow, RU;
Georgy P. Goryunov, Moscow, RU;
Pavel S. Kulyabin, Moscow, RU;
Dmitry V. Uborsky, Moscow, RU;
Alexander Z. Voskoboynikov, Moscow, RU;
ExxonMobil Chemical Patents Inc., Baytown, TX (US);
Abstract
This invention relates to transition metal complexes represented by the formula: catalyst systems comprising the complexes, and polymerization methods for olefinic monomers using the catalyst systems. In said formula, M is a transition metal; E is NR, CRR, O, S, or SiRR; Q is optional substitution; p is an integer ranging from 0 to 3; L is an optional neutral ligand; m is an integer ranging from 0 to 3; X is an anionic leaving group; n is 1 or 2, with m+n being 4 or less; J is a linker group contributing two or three atoms that are located within a first chelate ring; Rand Rare independently a hydrocarbyl group or a trihydrocarbylsilyl group; Ris a hydrocarbyl group; Rand Rare independently H, a hydrocarbyl group, or a trihydrocarbylsilyl group; and Rand Rare independently a hydrocarbyl group.