Dow Global Technolgoies LLC

W.r. Grace & Co. -conn.

Union Carbide Chemicals & Plastics Technology Corporation

Other

W. R. Grace Co.-conn.

Linfeng Chen

Tak W Leung

Tao Tao

Kuanqiang Gao

Mehmet Demirors

Richard E Campbell, Jr

William George Sheard

Kelly Gonzalez

Xiaodong Huang

Jan Willem Van Egmond

Stephanie M Whited

Kurt Frederick Hirsekorn

Jeffrey Dale Goad

Michael W Tilston

Clark C Williams

Teresa Plumley Karjala

Robert J Jorgensen

David M Pearson

Ping P Cai

Robert Reib

Marc A Springs

Jeffery S Bradley

Thomas L Nemzek

Gary A Roth

Peter N Nickias

Mridula Babli Kapur

David Gordon Barton

John Kalevi Kaarto

Andrew T Heitsch

Peter S Martin

Roger B Painter

Douglas S Ginger

Michael P Zummallen

Richard Alan Kemp

Brayden E Glad

Marlos Giuntini De Oliveira

Jeffrey A Sims

Jon W Hobson

Matthew J Fedec

Daniel W Baugh, Iii

Gregory J Brennan

Mingzhe Yu

Michael Philip Zum Mallen

Robert C Brady, Iii

Yongchao Zeng

Elva L Lugo

James X Shu

Robert N Reib

Richard E Campbell

Jeffrey D Goad

Jr Richard E Campbell

William G Sheard

Kelly A Gonzalez

Processes of polymerizing olefin monomers and catalyst systems. The catalyst systems include a non-hydrogen-generating post-metallocene procatalyst; a co-catalyst; and a hydrogenation procatalyst having the formula CpTiXTiCpor CpTiX, in which each Cp is cyclopentadienyl substituted with at least one (C-C)alkyl; each X is independently monoanionic or neutral, wherein each X is independently (C-C)hydrocarbon, (C-C)heterohydrocarbon, (C-C)hydrocarbyl, (C-C)heterohydrocarbyl, or a halogen atom; and n is 1 or 2.

Polymerization of ethylene in solution processes using a Ziegler-Natta catalyst and a hydrogenation procatalyst

Embodiments of the present disclosure are specifically related to LLDPE compositions produced from heterogeneous procatalyst compositions and blown and cast films incorporating these LLDPE compositions.

Ziegler-Natta catalyzed polyethylene resins and films incorporating same

Disclosed are catalyst compositions having an internal electron donor which includes a 3,6-di-substituted-1,2-phenylene aromatic diester. Ziegler-Natta catalyst compositions containing the present catalyst compositions exhibit very high hydrogen response, high activity, high selectivity and produce propylene-based olefins with high melt flow rate.

Production of high melt flow propylene-based polymer and product from same

A heterogeneous procatalyst includes a preformed heterogeneous procatalyst and a metal-ligand complex. The preformed heterogeneous procatalyst includes a titanium species and a magnesium chloride (MgCl) support. The metal-ligand complex has a structural formula (L)M(Y)(XR), where M is a metal cation; each L is a neutral ligand or (═O); each Y is a halide or (C-C)alkyl; each XRis an anionic ligand in which X is a heteroatom or a heteroatom-containing functional group and Ris (C-C)hydrocarbyl or (C-C) heterohydrocarbyl; n is 0, 1, or 2; m is 0-4; and b is 1-6. The metal-ligand complex is overall charge neutral. The heterogeneous procatalyst exhibits improved average molecular weight capability. A catalyst system includes the heterogeneous procatalyst and a cocatalyst. Processes for producing the heterogeneous procatalyst and processes for producing ethylene-based polymers utilizing the heterogeneous procatalyst are also disclosed.

Ziegler-Natta catalyst with an electron donor compound for increasing polymer molecular weight

A magnesium halide-supported titanium procatalyst, a catalyst prepared therefrom, an enhanced catalyst consists essentially of a product of a reaction of the magnesium halide-supported titanium procatalyst and a hydrocarbylaluminoxane. Also methods of preparing the (pro)catalysts, a method of polymerizing an olefin, and a polyolefin made by the polymerization method.

Magnesium halide-supported titanium (pro)catalysts

A modified Ziegler-Natta procatalyst that is a product mixture of modifying an initial Ziegler-Natta procatalyst with a molecular (pro)catalyst, and optionally an activator, the modifying occurring before activating the modified Ziegler-Natta procatalyst with an activator and before contacting the modified Ziegler-Natta procatalyst with a polymerizable olefin. Also, a modified catalyst system prepared therefrom, methods of preparing the modified Ziegler-Natta procatalyst and the modified catalyst system, a method of polymerizing an olefin using the modified catalyst system, and a polyolefin product made thereby.

Modified Ziegler-Natta (pro) catalysts and system

The heterogeneous procatalyst of this disclosure includes a titanium species; a hydrocarbon soluble transition metal compound having a structure M(OR); a chlorinating agent having a structure A(Cl)(R), and a magnesium chloride component. M of M(OR)is a non-reducing transition metal other than titanium, the non-reducing transition metal being in an oxidation state of +2 or +3. Each Ris independently (C-C)hydrocarbyl or &#x2014;C(O)R, where Ris (C-C)hydrocarbyl. Subscript z of M(OR)is 2 or 3. Each Rand Rmay be optionally substituted with one or more than one halogen atoms, or one or more than one &#x2014;Si(R), where each Ris (C-C)hydrocarbyl. A of A(Cl)(R)is aluminum or boron; Ris (C-C)hydrocarbyl; and x is 1, 2, or 3; and a magnesium chloride component.

Ziegler-Natta catalysts for the production of polyethylene

A zirconocene-titanocene catalyst system comprising a zirconocene catalyst and a titanocene catalyst; polyolefins; methods of making and using same; and articles containing same.

Zirconocene-titanocene catalyst system

Process for production of high melt flow propylene-based polymer and product from same

A method of polymerizing an olefin using a combination of a Ziegler-Natta catalyst and an unsupported molecular catalyst in a same reactor at the same time to give a polyolefin product, and the polyolefin product made by the method. Also, methods of preparing the combination of (pro)catalysts.

Method of polymerizing an olefin

The present disclosure provides a Ziegler-Natta catalyst composition comprising a procatalyst, a cocatalyst and a mixed external electron donor comprising a first selectivity control agent, a second selectivity control agent, and an activity limiting agent. A polymerization process incorporating the present catalyst composition produces a high-stiffness propylene-based polymer with a melt flow rate greater than about 50 g/10 min. The polymerization process occurs in a single reactor, utilizing standard hydrogen concentration with no visbreaking.

Catalyst composition with mixed selectivity control agent and method

The present invention relates to an improvement for gas-phase olefin polymerization process having relatively high bed bulk density. The improvement involves the use of mixed external electron donors when polymerizing propylene in a gas-phase reactor having a polymer bed with a bulk density greater than 128 kg/m, optionally with one or more comonomers, wherein the mixed electron donor system comprises at least a first external electron donor and a second external electron donor, and wherein the first external electron donor is a carboxylate compound.

Process for gas-phase polymerization having high bed bulk density

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Missouri City, TX, United States of America

Linfeng Chen