Univation Technologies, LLC

Union Carbide Chemicals & Plastics Technology Corporation

Rohm and Haas Company

Other

Symyx Solutions, Inc.

Timothy R Lynn

John Francis Szul

Mark Gregory Goode

Roger L Kuhlman

John Henry Oskam

Bruce Jon Savatsky

Sun-Chueh Kao

Robert J Jorgensen

Ayush A Bafna

Kersten Anne Terry

Timothy Todd Wenzel

David H McConville

Simon Mawson

Tae Hoon Kwalk

Matthew Gary McKee

Robert Harold Vogel

Fathi David Hussein

Michael D Awe

Nitin Borse

Daniel Paul Zilker, Jr

Wesley R Mariott

Cliff Robert Mure

Swapnil B Chandak

Robert Converse Brady, Iii

Frederick John Karol

Eric P Wasserman

C Jeff Harlan

Bo Liu

Yi Zhang

Chi-I Kuo

Richard B Pannell

F David Hussein

Timothy Marlow Boller

Phuong Anh Cao

David Michael Glowczwski

Clark Curtis Williams

R Eric Pequeno

Daniel P Zilker

Chuan C He

Daniel N Thomas, Jr

Mark Wilton Smale

Kevin Joseph Cann

John H Moorhouse

James McLeod Farley

Mark Bradley Davis

William Albert Matthews

Mark Williams Blood

Natarajan Anand Muruganandam

Kefu Sun

Francois Alexandre

Daudi A Abe

Jody Michael Moffett

Charles D Lester

Vincent P Morrison

Jeff C Harlan

Timothy M Boller

Ching-Tai Lue

Leonid Matsiev

Eric Gustave Lundquist

Eric John Markel

Daniel D VanderLende

Newman M Bortnick

Carlos Alfonso Cruz

Robert H Gore

Oleg Kolosov

Angela I Padilla-Acevedo

Haiqing Peng

Warren Harvey Machleder

Thomas Cleveland Kirk

Peter S Martin

Jane Elizabeth Weier

Robert Lorenz Boysen

Randall L Force

Daniel D Vanderlende

Robert Reib

Charles W Lipp

Ian D Burdett

Arnis U Paeglis

Juliet Bauer Wagner

François Alexandre

John Joseph Bielak

Joel D Wieliczko

Mahsa McDougal

Douglas H Jackson

Jeffrey D Collins

Robert Converse Brady Iii

Daniel C Garska

Natarajan Muruganandam

John J Bielak

Mark W Blood

Mahsa Mcdougal

Juliet B Wagner

John H Oskam

Mark B Davis

Kersten A Terry

William A Matthews

A method of independently changing a melt rheology property value of a bimodal polyethylene polymer being made using a bimodal catalyst system in a single gas phase polymerization reactor. The method comprises process conditions comprising alkane(s) in the reactor. The method comprises a bimodal catalyst system that is characterized by an inverse response to alkane(s) concentration. The method comprises changing concentration of the alkane(s) in the reactor by an amount sufficient to effect a measurable change in the melt rheology property value; wherein the bimodal catalyst system is characterized by an inverse response to alkane(s) concentration such that when the alkane(s) concentration is increased, the melt rheology property value of the resulting bimodal polyethylene polymer is decreased, and when the alkane(s) concentration is decreased, the melt rheology property value of the resulting bimodal polyethylene polymer is increased.

Method of changing melt rheology property of bimodal polyethylene polymer

A bimodal ethylene-co-1-hexene copolymer composition consisting of a higher molecular weight component and a lower molecular weight component and, when in melted form at 190 degrees Celsius, is characterized by a melt property performance defined by a combination of melt index (5 kg), melt strength, and, optionally, shear thinning properties, and, when in solid form, is characterized by a slow crack growth property performance defined by a combination of strain hardening modulus and accelerated full-notch creep test performance. A pipe consisting of the bimodal ethylene-co-1-hexene copolymer composition. A method of synthesizing the bimodal ethylene-co-1-hexene copolymer composition. A method of making the pipe. A manufactured article, which is not a pipe, comprising the bimodal ethylene-co-1-hexene copolymer composition.

Bimodal polyethylene copolymer composition and pipe made thereof

A bimodal ethylene-co-1-hexene copolymer consisting essentially of a higher molecular weight component and a lower molecular weight component and, when in melted form at 190 degrees Celsius, is characterized by a unique melt property space defined by a combination of high-load melt index, melt flow ratio, and melt elasticity properties. A blown film consisting essentially of the bimodal ethylene-co-1-hexene copolymer. A method of synthesizing the bimodal ethylene-co-1-hexene copolymer. A method of making the blown film. A manufactured article comprising the bimodal ethylene-co-1-hexene copolymer.

Bimodal polyethylene copolymer and film thereof

A bimodal linear polyethylene composition, products made therefrom, methods of making and using same, and articles containing same.

Polyethylene composition

A bimodal polyethylene composition, products made therefrom, methods of making and using same, and articles, including bottle caps and closures, containing same.

Multimodal polyethylene composition

A bimodal ethylene-co-1-butene copolymer consisting essentially of a higher molecular weight component and a lower molecular weight component and, when in melted form at 190 degrees Celsius, is characterized by a unique melt property space defined by a combination of high-load melt index, melt flow ratio, and melt elasticity properties. A (blown) film consisting essentially of the bimodal ethylene-co-1-butene copolymer and having improved properties. Methods of synthesizing the bimodal ethylene-co-1-butene copolymer and making the blown film. A manufactured article comprising the bimodal ethylene-co-1-butene copolymer.

Embodiments of the present disclosure are directed towards method for modifying a polymer flow index. As an example, a method for modifying a polymer flow index can include providing monomers to a polymerization reactor, providing a chromium catalyst to the polymerization reactor, and providing an active amount of a flow index modifier to the polymerization reactor, wherein the flow index modifier is selected from carbon dioxide, carbon monoxide, 2,4-hexadiene, and combinations thereof.

Polymer flow index modifier

A polymerization catalyst system, a method of using the polymerization catalyst system, and a polymer produced with the catalyst system. The polymerization catalyst system has a non-metallocene catalyst and a metallocene catalyst. The metallocene catalyst has the formula: wherein Rand Rare each independently, phenyl, methyl, chloro, fluoro, or a hydrocarbyl group.

Producing polyolefin products

A method including a) polymerizing at least one monomer in a gas phase reactor in the presence of a supported multimodal catalyst system to form a multimodal polyethylene product having a reactor split equal to respective weight fractions of resin components in the polyethylene product; b) applying a predetermined formula for a product parameter of the multimodal polyethylene product; c) obtaining incorporation data and production rate data from the reaction based upon the predetermined formula; d) determining an actual hydrogen leading indicator; e) comparing the actual hydrogen leading indicator to a target value for a hydrogen leading indicator to determine a deviation of the actual hydrogen leading indicator from the target value; and f) adjusting an amount of a catalyst precursor being fed to the gas phase reactor to control reactor split and a product parameter.

Controlling reactor split and a product parameter

A bimodal polyethylene composition made with a bimodal catalyst system, wherein the bimodal polyethylene composition has from greater than 0 to 14 weight percent of polyethylene polymers having a weight-average molecular weight of from greater than 0 to 10,000 grams per mol, products made therefrom, methods of making and using same, and articles containing same.

Bimodal polyethylene

An ethylene/alpha-olefin copolymer that can be synthesized in a fluidized-bed, gas phase polymerization reactor and made into a blown film. The ethylene/alpha-olefin copolymer is characterized by a bubble stability-effective combination of properties comprising density, melt flow ratio ('I/I'), and melt storage modulus G' (G&#x2033;=3,000 Pa). The synthesis in the FB-GPP reactor is characterized by a property-imparting-effective combination of operating conditions comprising reactor bed temperature and H2/C2 gas molar ratio. An embodiment of the blown film consisting of the ethylene/alpha-olefin copolymer is characterized by enhanced bubble stability. A method of making the ethylene/alpha-olefin copolymer. A film comprising the ethylene/alpha-olefin copolymer. A method of making the film. A manufactured article comprising the film.

Polyethylene copolymer resins and films

Provided are various bimodal polyethylene, including but not limited to a bimodal polyethylene for a pipe having a density of from 0.9340 to 0.9470 gram/cubic centimeters (g/ccm), a melt index (12) of from 0.1 to 0.7 gram/10 minute, a melt flow ratio (121/12) of from 20 to 90. The bimodal polyethylene includes a high molecular weight polyethylene component and a low molecular weight polyethylene component which are a reaction product of a polymerization process performed in a single reactor and that employs a bimodal polymerization catalyst system. The bimodal polymerization catalyst system includes a bimodal catalyst system of bis(2-pentamethylphenylamido)ethyl)amine Zirconium dibenzyl and either (tetramethylcyclopentadienyl)(n-propylcyclopentadienyl)Zirconium dichloride or (tetramethylcyclopentadienyl)(n-propylcyclopentadienyl)zirconium dimethyl in a 3.0:1 molar ratio; and a trim catalyst of (tetramethylcyclopentadienyl)(n-propylcyclopentadienyl)Zirconium dichloridedimethyl in heptane added to adjust melt.

Embodiments of the present disclosure directed towards bimodal polymerization catalysts. As an example, the present disclosure provides a bimodal polymerization catalyst system including a non-metallocene olefin polymerization catalyst and a zirconocene catalyst of Formula I: (Formula I) where each of R, R, and Rare independently a Cto Calkyl, aryl or aralkyl group or a hydrogen, where Ris a Cto Calkyl, aryl or aralkyl group, and where each X is independently a halide, Cto Calkyl, aralkyl group or hydrogen. 

Biomodal polymerization catalysts

Embodiments of the present disclosure directed towards polymerization catalysts having improved ethylene enchainment. As an example, the present disclosure provides a polymerization catalyst having improved ethylene enchainment, the polymerization catalyst comprising a zirconocene catalyst of Formula (I) where Ris a Cto Calkyl, aryl or aralkyl group, wherein Ris an Cto Calkyl, aryl or aralkyl group, and where Ris a Cto Calkyl or a hydrogen, and where each X is independently a halide, Cto Calkyl, aralkyl group or hydrogen. 

Polymerization catalysts with improved ethylene enchainment

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Middlesex, NJ, United States of America

Timothy R Lynn