Exxonmobil Chemical Patents Inc.

Univation Technologies, LLC

Other

Eastman Chemical Company

Laughlin G McCullough

Matthew William Holtcamp

Matthew S Bedoya

Subramaniam Kuppuswamy

Ching-Tai Lue

Francis Charles Rix

Dongming Li

Gregory S Day

Adriana S Silva

Donna Jean Crowther

John Francis Szul

James McLeod Farley

Jo Ann M Canich

James Richardson Lattner

Pradeep P Shirodkar

David F Sanders

Xuan Ye

Kevin A Stevens

David Michael Fiscus

Ryan Winston Impelman

Agapios Kyriacos Agapiou

Stephen Neal Falling

C Jeff Harlan

James Christopher Matayabas, Jr

John F Walzer, Jr

Charles J Harlan

Peter B MacKenzie

Stephen A Godleski

Marvin D Rausch

Patricia Lopez-Maldonado

Juan Carlos Flores

Gary Michael Diamond

Robert Tan Li

Jay L Reimers

Chi-I Kuo

Lubin Luo

Peter Loezos

Keith Hall

Porter Clarke Shannon

George Alan Vaughan

Fred David Ehrman

James C Chien

Michael W Weber

Sarah J Mattler

Lily Joy Ackerman

Jacqueline A Lovell

Victor Oswaldo Nava-Salgado

James C W Chien

Glen E Alliger

Steven D Brown

Robert Lynn Santana

Michelle E Titone

Richard E Pequeno

Hasnain Rangwalla

Arturo Leyva

Celestino M Perez, Jr

Randell Wayne Dickey

Matthew F Yott

Steven K Ackerman

Daniel G Oneil

The present disclosure provides metallocene catalyst compounds including at least one —Si— containing linker, catalyst systems including 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 at least one —Si-containing linker. In another class of embodiments, the present disclosure is directed to polymerization processes to produce polyolefin polymers from catalyst systems including one or more olefin polymerization catalysts, at least one activator, and an optional support.

Metallocenes and methods thereof

A polyethylene composition having from about 0.5 to about 20 wt % of alpha-olefin derived units other than ethylene-derived units, with the balance including ethylene-derived units, total internal unsaturations (Vy1+Vy2+T1) of from about 0.15 to about 0.40 per 1000 carbon atoms, an MI of from about 0.1 to about 6 g/10 min, an HLM1 of from about 5.0 to about 40 g/10 min, a density of from about 0.890 to about 0.940 g/ml, a Tw-Twvalue of from about &#x2212;50 to about &#x2212;23&#xb0; C., an Mw/Mwvalue of from about 2.0 to about 3.5, an Mw/Mn of from about 4.5 to about 12, an Mz/Mw of from about 2.5 to about 3.0, an Mz/Mn of from about 15 to about 25, and a g'greater than 0.90.

Polyethylene compositions and films prepared therefrom

A catalyst system including the product of the combination of an unbridged Group 4 metallocene compound and a 2,6-bis(imino)pyridyl iron complex is provided. A process for the polymerization of monomers (such as olefin monomers) and a polymer produced therefrom are also provided.

Catalyst systems and polymerization processes for using the same

The present disclosure provides bridged metallocene catalyst compounds comprising &#x2014;Si&#x2014;Si&#x2014; 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&#x2014;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.

Metallocenes with Si&#x2014;Si bridges

The present disclosure provides bridged metallocene catalyst compounds including at least two &#x2014;Si&#x2014;Si&#x2014; bridges, catalyst systems including 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 at least two Si&#x2014;Si-containing bridges. In another class of embodiments, the present disclosure is directed to polymerization processes to produce polyolefin polymers from catalyst systems including one or more olefin polymerization catalysts, at least one activator, and an optional support.

Metallocenes with two -Si-Si- bridges

A polyethylene composition comprising from about 0.5 to about 20 wt % of alpha-olefin derived units other than ethylene-derived units, with the balance including ethylene-derived units, total internal unsaturations (Vy1+Vy2+T1) of from about 0.10 to about 0.40 per 1000 carbon atoms, an MI of from about 0.1 to about 6 g/10 min, an HLMI of from about 5.0 to about 40 g/10 min, a density of from about 0.890 to about 0.940 g/ml, a Tw-Twvalue of from about &#x2212;25 to about &#x2212;20&#xb0; C., an Mw/Mwvalue of from about 1.2 to about 2.0, an Mw/Mn of from about 4.5 to about 12, an Mz/Mw of from about 2.0 to about 3.0, an Mz/Mn of from about 7.0 to about 20, and a g'greater than 0.90.

The present disclosure relates to dual catalyst systems and processes for use thereof. The present disclosure further provides a catalyst system that is a combination of at least two hafnium metallocene catalyst compounds. The catalyst systems may be used for olefin polymerization processes. The present disclosure further provides for polymers, which can be formed by processes and catalyst systems of the present disclosure.

Catalyst systems including two hafnocene catalyst compounds

The present disclosure provides a supported catalyst system and process for use thereof. In particular, the catalyst system includes an unbridged metallocene compound, an additional unbridged metallocene compound having a structure different than the first unbridged metallocene compound, a support material and an activator. The catalyst system may be used for preparing polyolefins.

Mixed catalysts with unbridged hafnocenes with -CH2-SiMe3 moieties

In at least one embodiment, a catalyst compound is represented by Formula (I): 

Sterically hindered metallocenes, synthesis and use

Catalyst systems including more than one metallocene catalysts and processes for using the same are provided to produce polyolefin polymers such as polyethylene polymers.

Polyethylene compositions including at least 65 wt % ethylene derived units, based upon the total weight of the polyethylene composition, are provided.

Polyethylene compositions and articles made therefrom

This invention relates to a supported catalyst system and process for use thereof. In particular, the catalyst system includes bridged hafnium metallocene compound, an unbridged metallocene compound, a support material and an activator. The catalyst system may be used for preparing polyolefins.

Supported catalyst systems and processes for use thereof

This invention relates to a catalyst system including fluorided silica, alkylalumoxane activator and a bridged monocyclopentadienyl group 4 transition metal compound, where the fluorided support has not been calcined at a temperature of 400&#xb0; C. or more, and is preferably, produced using a wet mix method, particularly an aqueous method.

Catalyst composition comprising fluorided support and processes for use thereof

This invention relates to metallocene compounds having a group substituted at the 3 position of at least one cyclopentadienyl ring represented by the formula &#x2014;CH&#x2014;SiR'or &#x2014;CH&#x2014;CR&#x2032;and R&#x2032; is a Cto Csubstituted or unsubstituted hydrocarbyl.

Group 4 catalyst compounds and process for use thereof

Growing community of inventors

League City, TX, United States of America

Laughlin G McCullough