Exxonmobil Chemical Patents Inc.

Nikola S Lambic

John Robert Hagadorn

Jo Ann M Canich

Charles J Harlan

Sarah J Mattler

Carlos R Lopez-Barron

Peijun Jiang

Tzu-Pin Lin

Gursu Culcu

An Ngoc-Michael Nguyen

Avery R Smith

Compositions may comprise symmetrical and asymmetrical pyridine-containing transition metal-complexes having appended group 13 Lewis acids positioned on the pyridine-containing ligands of the transition metal-complex such that the group 13 Lewis acid may be near the catalytic site, thereby allowing the appended group 13 Lewis acid to function more efficiently in promoting formation of a catalytically active species. Catalysts systems may comprise these symmetrical and asymmetrical pyridine-containing transition metal-complexes and methods of preparing polyolefins may use these catalyst systems.

Transition metal-complex catalysts having appended group 13 Lewis acids and related polymerization methods

This invention relates to a process to produce an ionomer comprising: 1) contacting, in a reactor, one or more C-Cα-olefins, an optional diene, and a metal alkenyl with a catalyst system comprising an activator, a catalyst compound, and a support; 2) forming a copolymer comprising one or more C-Cα-olefin monomers and about 0.01 wt % to about 20 wt %, based on the weight of the copolymer, of metal alkenyl; 3) functionalizing and quenching the polymerization reaction with one or more electrophilic groups; and 4) obtaining ionomer.

Polyolefin-based ionomers and production thereof

A catalyst compound and process for olefin polymerization. The catalyst can be represented by Formula (I): wherein: M is a transition metal selected from group 3, 4, or 5 of the Periodic Table of Elements; L is a linking group selected from any one or more difunctional C-Chydrocarbyl, aryl or substituted aryl groups; T is an optional bridging group; each X is a univalent anionic ligand, or two Xs are joined and bound to the metal atom to form a metallocycle ring, or two Xs are joined to form a chelating ligand, a diene ligand, or an alkylidene ligand; Rand Rare each independently a hydrogen atom or substituted or unsubstituted Cto Chydrocarbyl group; R, R, Rand Rare each independently a hydrogen atom or a substituted or unsubstituted Cto Chydrocarbyl group, and, optionally, any two of R, R, and Rcan be joined to form a cyclic structure; Ris a substituted or unsubstituted aryl group; and R, R, R, and Rare each independently a substituted or unsubstituted Cto Chydrocarbyl group and, optionally, Rand Rare joined to form a cyclic structure.

Polyolefins prepared with binuclear metallocene catalysts

This invention relates to supported catalyst compositions of transition metal complexes of a dianionic, tridentate ligand that features a central neutral heterocyclic Lewis base and two phenolate donors, where the tridentate ligand coordinates to the metal center to form two eight-membered rings. Preferably the bis(phenolate) complexes are represented by Formula (I): where M, L, X, m, n, E, E', Q, R, R, R, R, R, R, R, R, A, A, AA, and AAare as defined herein, where AQAare part of a heterocyclic Lewis base containing 4 to 40 non-hydrogen atoms that links Ato Avia a 3-atom bridge with Q being the central atom of the 3-atom bridge.

Supported transition metal bis(phenolate) complexes and their use as catalysts for olefin polymerization

Growing community of inventors

Houston, TX, United States of America

Nikola S Lambic