Dow Global Technolgoies LLC

The Dow Chemical Company

Other

Blue Cube IP LLC

Kevin A Frazier

Paul C Vosejpka

Harold W Boone

David D Devore

Francis J Timmers

Jasson T Patton

Daniel D VanderLende

Carl N Iverson

James M Renga

Thomas P Clark

Gyongyi Gulyas

D Patrick Green

Arthur J Ashe, Iii

Xinggao Fang

James C Stevens

Jerzy Klosin

Maurice J Marks

Richard E Campbell, Jr

Daniel J Arriola

Arkady L Krasovskiy

Richard R Klimpel

Juan M Garces

Robert D J Froese

Guo-shuh J Lee

Lixin Sun

Endre Szuromi

Pulikkottil Jacob Thomas

Sara B Klamo

Robert J Wright

Ian M Munro

Donald E Leonard

Kevin P Peil

Roy A Periana-Pillai

Shaoguang S Feng

Nermeen W Aboelella

Margaret E Schott

Joseph S Renny

Joseph N Iii Coalter

Embodiments are directed to a catalyst system comprising metal-ligand complexes and processes for polyolefin polymerization using the metal-ligand complex having the following structure: 

Biaryl phenoxy group IV transition metal catalysts for olefin polymerization

A process for preparing a divinylarene dioxide including reacting (a) at least one divinylarene, (b) hydrogen peroxide, (c) at least one iron-containing catalyst, and (d) an excess of amine hydrogen halide, under conditions to form a divinylarene dioxide.

Process for preparing a divinylarene dioxide

Group 4 metal complexes comprising a polyvalent, heteroaryl donor ligand and their use as components of olefin polymerization catalysts, especially suited for preparing propylene copolymer products having high isotacticity and low molecular weight, are disclosed.

High activity, low molecular weight olefin polymerization process

The present invention generally relates to a process that copolymerizes two or more polymerizable olefins, and to cataclyst comprising a metal-ligand complex (precatalyst). The present invention also generally relates to ligands useful for preparing the metal-ligand complex.

Process for polymerizing a polymerizable olefin and catalyst therefor

Group 4 metal complexes comprising a polyvalent, heteroaryl donor ligand and their use as components of olefin polymerization catalysts, especially suited for preparing propylene/ethylene copolymer products having high isotacticity and low molecular weight, are disclosed.

The invention relates to a process for preparing a stable 2-substituted benzofuran-3-yl borate ester corresponding to the formula: said process comprising contacting 3-bromo-2-substituted-benzofuran corresponding to the formula: with an Calkyllithium at a temperature less than &#x2212;60&#xb0; C. to form 3-lithio-2-substititued-benzofuran, contacting the 3-lithio-2-substituted- benzofuran at a temperature less than &#x2212;60&#xb0; C. with an borate ester corresponding to the formula: and recovering the resulting borate ester product,

Process for preparing A 2-substituted benzofuran-3-yl borate ester

This disclosure relates to olefin polymerization catalysts and compositions, their manufacture, and the production of polyolefins using specific catalyst compositions, including the use of chain shuttling agents in the olefin polymerization process. Specifically, this disclosure provides for dual headed and multi-headed chain shuttling agents (CSAs or MSAs) and for their use in preparing blocky copolymers. By controlling the ratio of dual-headed and multi-headed CSA sites to mono-headed CSA sites, a blocky copolymer can be provided having properties such as a narrow molecular weight distribution and/or improved melt properties.

Dual- or multi-headed chain shuttling agents and their use for preparation of block copolymers

A process for preparing a divinylarene dioxide comprising reacting a divinylarene, such as divinylbenzene, with hydrogen peroxide in the presence of a solvent and in the presence of a catalyst to from a divinylarene dioxide; wherein the hydrogen peroxide is present in the reaction mixture in an excess or an equivalent mole ratio per mole of divinylarene.

Process for preparing divinylarene dioxides

Hafnium complexes of heterocyclic organic ligands having improved solubility in aliphatic hydrocarbon solvents and their use as components of olefin polymerization catalysts as well as novel syntheses of component parts thereof are disclosed.

Hafnium complexes of heterocyclic organic ligands

The present invention generally relates to a new process of making a trialkyl aluminum compound in which at least one alkyl group is a primary alkyl derived from an internal olefin or alpha-olefin. The process employs an isomerization/hydroalumination catalyst.

Process of making aluminum alkyls

Group 4 metal complexes useful as addition polymerization catalysts of the formula:wherein

High activity olefin polymerization catalyst and process

Metal complexes comprising a polydentate chelating group, catalysts and polymerization processes using the same for the polymerization of olefins, especially propylene, are disclosed.

Transition metal complexes and olefin polymerization process

An improved process for forming bridged Group 4 transition metal complexes using boron trihalide and a magnesium dicyclopentadienyl compound to form a dicyclopentadienyl boron halide intermediate for subsequent metallation or other synthetic use and novel metal complexes.

Bridged metal complexes

Catalyst compositions comprising bridged metal complexes and an activating cocatalyst

Growing community of inventors

Midland, MI, United States of America

Kevin A Frazier