Dow Global Technolgoies LLC

Union Carbide Chemicals & Plastics Technology Corporation

Univation Technologies, LLC

Stephanie M Whited

Rajen M Patel

Roger L Kuhlman

William James Michie, Jr

Mridula Babli Kapur

Michael A Kinnan

Dale M Elley-Bristow

Robert J Jorgensen

Lonnie G Hazlitt

Linfeng Chen

Dane Chang

David T Gillespie

Michael D Turner

Thoi H Ho

Burkhard Eric Wagner

Yijian Lin

Debra R Wilson

Anthony Charles Neubauer

David M Pearson

Mark Bradley Davis

Theresa J Hermel-Davidock

Angela I Padilla-Acevedo

Sanjib Biswas

Nathan J Wiker

Siddharth Ram Athreya

Alexander Williamson

Andrew T Heitsch

Keran Lu

Peter S Martin

Thomas W Kay

Troy M Tambling

Laszlo L Ban

Jr Michie William J

Mark T Jablonka

Michael W Tilston

Mahsa McDougal

Sarah E Patterson

Rhett A Baillie

Adriana Velasquez

Alexander Stolarz

Elva L Lugo

Russell T Cooper

William Michie

Robert James Jorgensen

Mridula Kapur

William J Michie

Tian Lan

Robert Reib

John L Sugden

Anthony C Neubauer

Tamara L Brennan

Alex Stolarz

Robert N Reib

Timothy J Hogan

Darin G Clark

Anthony Neubauer

A bimodal polyethylene-based composition that is useful for making under film extrusion conditions a film that beneficially has both decreased water vapor transmission rate and decreased haze. The composition comprises an improved design of the composition of the polyethylene blend of a higher molecular weight polyethylene polymer constituent and a lower molecular weight polyethylene polymer constituent and an effective amount of a nucleating agent. Additional embodiments include a method of making the bimodal polyethylene-based composition, a formulation comprising the bimodal polyethylene-based composition and at least one additive, a method of making a manufactured article from the bimodal polyethylene-based composition or formulation; the manufactured article made thereby, use of the bimodal polyethylene-based composition for protecting a moisture-sensitive material, and a sealed package made therefrom. A bimodal polyethylene-based composition that is useful for making under film extrusion conditions a film that beneficially has both decreased water vapor transmission rate and decreased haze. The composition comprises an improved design of the composition of the polyethylene blend of a higher molecular weight polyethylene polymer constituent and a lower molecular weight polyethylene polymer constituent and an effective amount of a nucleating agent. Additional embodiments include a method of making the bimodal polyethylene-based composition, a formulation comprising the bimodal polyethylene-based composition and at least one additive, a method of making a manufactured article from the bimodal polyethylene-based composition or formulation; the manufactured article made thereby, use of the bimodal polyethylene-based composition for protecting a moisture-sensitive material, and a sealed package made therefrom.

Bimodal polyethylene-based composition

An injection molded cap or closure having a weld line, wherein the injection molded cap or closure is formed from an ethylene-based resin comprising a high molecular weight component and a low molecular weight component.

Injection molded caps or closures, and methods thereof

A high-density polyethylene composition that is formulated for being injection molded into an injection-molded bottle cap closure comprising a skirt that axially extends from the periphery of a base, and internal screw threads for securing the cap to a container, and method of producing the same.

High-density polyethylene compositions, method of making the same, injection molded articles made therefrom, and method of making such articles

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

The invention provides a composition comprising the following components: A) a first composition, wherein the first composition comprises a first ethylene-based polymer and a second ethylene-based polymer, and wherein the ratio of the 'high load melt index (I21) of the first composition' to the 'high load melt index (I21) of the first ethylene-based polymer' is greater than, or equal to, 40, and B) one or more azide compounds present in an amount greater than, or equal to, 50 ppm, based on the weight of the first composition.

Ethylene-based polymer compositions with improved processability

The present disclosure provides formulation. The formulation contains a high density polyethylene composition containing (i) a high molecular weight component including an ethylene/a-olefin copolymer, the high molecular weight component having a density from 0.924 to 0.930 g/cc and a high load melt index (121) from 0.3 to 0.9 g/10 min; and (ii) a low molecular weight component including an ethylene-based polymer selected from the group consisting of an ethylene homopolymer and an ethylene/a-olefin copolymer. The high density polyethylene composition has (a) a density from 0.950 to 0.956 g/cc; (b) a high load melt index (121) from 15 to 28 g/10 min; (c) an 121/12 of at least 85; (d) a notched constant tensile load failure time at 35% yield stress of greater than 90 hours; and (e) an environmental stress crack resistance (ESCR) F0 value, according to ASTM D1693&#x2014;condition B (100% IGEPAL), of greater than 2,000 hours.

Formulation containing a high density polyethylene composition and microirrigation drip tapes containing the same

An ethylene-based resin comprising a high molecular weight component and a low molecular weight component, wherein the high molecular weight component comprises an ethylene/alpha-olefin copolymer or ethylene homopolymer, and has a density ranging from 0.940 g/cc to 0.960 g/cc, and a high load melt index (I21.6) ranging from 4 g/10 min to 15 g/10 min, and wherein the ethylene-based resin has: an overall density ranging from greater than 0.955 to less than or equal to 0.970 g/cc, an overall melt index (I2.16) ranging from 0.5 g/10 min to 7 g/10 min, and less than 0.2 vinyls per 1000 carbon atoms.

Ethylene-based resins for closure applications

The instant invention is a high-density polyethylene composition, method of producing the same, injection molded articles made therefrom, and method of making such articles. The high-density polyethylene composition of the instant invention includes a first component, and a second component. The first component is a high molecular weight ethylene alpha-olefin copolymer having a density in the range of 0.920 to 0.946 g/cm, and a melt index (I) in the range of 1 to 15 g/10 minutes. The second component is a low molecular weight ethylene polymer having a density in the range of 0.965 to 0.980 g/cm, and a melt index (I) in the range of 30 to 1500 g/10 minutes. The high-density polyethylene composition has a melt index (I) of at least 1, a density in the range of 0.950 to 0.960 g/cm.

A polyethylene composition suitable for use in a living hinge component, the composition comprising a first ethylene-based polymer component, the first ethylene-based polymer component has a density of from 0.91.5 g/cc to less than 0.940 g/cc. and a melt index, I, of less than 5 g/10 min. and a second ethylene-based polymer component, wherein the composition has an overall density of from 0.945 g/cc to 0.960 g/cc and an overall melt index, I, of from 5 g/10 min to 20 g/10 min.

Polyethylene compositions having living hinge properties

The invention provides a composition comprising a first composition, wherein the first composition comprises a first ethylene-based polymer and a second ethylene-based polymer, and wherein the first composition has a high load melt index (I) less than 17, a density greater than, or equal to, 0.952 g/cm, a molecular weight distribution MWD (conv), defined as the ratio of the weight average molecular weight to the number average molecular weight (Mw (conv)/Mn (conv)), greater than, or equal to, 11; and a viscosity ratio, &#x3b7;(0.01 s)/&#x3b7;(100 s) at 190&#xb0; C., greater than, or equal to, 60.

Ethylene-based polymer compositions, and articles prepared from the same

The instant invention provides a method for polymerizing one or more ethylene-based polymers. The method for polymerizing one or more ethylene-based polymers according to the present invention comprises the following steps: (1) selecting ethylene and optionally one or more alpha-olefin comonomers; (2) selecting one or more catalyst systems comprising one or more procatalysts comprising Ti, one or more cocatalysts comprising Al, and one or more self-limiting agents (SLA); wherein the ratio of SLA to Ti is from 5:1 to 40:1 and the ratio of Al to SLA is from 2:1 to 40:1; (3) polymerizing said ethylene and optionally one or more alpha-olefin comonomers in the presence of said one or more catalyst systems via a slurry polymerization process or gas-phase polymerization process in one or more reactors; (4) thereby producing one or more ethylene; wherein said catalyst system has a loss of least 85% of catalyst productivity when the temperature is increased from 85 to 115 C.

Method for producing one or more ethylene-based polymers

The instant invention provides a polyolefin composition, a catalyst composition, and a method of producing the same. The method for polymerizing one or more polyolefins according to the present invention comprises the steps of: (1) selecting a first olefin monomer and optionally one or more alpha-olefin comonomers; (2) selecting one or more catalyst systems comprising one or more procatalysts comprising a first metal selected from the group consisting of Ti, V, Hf, Zr, and combinations or mixture two or more thereof, one or more cocatalysts comprising Al, and one or more self-limiting agents (SLA) selected from the group consisting of polyether, polyester, and combinations or mixtures thereof; wherein the ratio of said SLA to said first metal (SLA:first metal) is from 0.1:1 to 30:1; (3) polymerizing said first olefin monomer and optionally one or more alpha-olefin comonomers in the presence of said one or more catalyst systems via a slurry polymerization process or gas-phase polymerization process in one or more reactors; (4) thereby producing one or more olefin-based polymers; (5) wherein said catalyst system has a loss of least 85 percent of catalyst activity when the temperature is increased from 85 to 110&#xb0; C.

Polyolefin composition and method of producing the same

The instant invention is a high-density polyethylene composition, method of producing the same, articles made therefrom, and method of making such articles. The high-density polyethylene composition of the instant invention includes a first component, and a second component. The first component is a high molecular weight ethylene alpha-olefin copolymer having a density in the range of 0.915 to 0.940 g/cm, and a melt index (I) in the range of 0.5 to 10 g/10 minutes. The second component is a low molecular weight ethylene polymer having a density in the range of 0.965 to 0.980 g/cm, and a melt index (I) in the range of 50 to 1500 g/10 minutes. The high-density polyethylene composition has a melt index (I) of at least 1, a density in the range of 0.950 to 0.960 g/cm, and g' of 1.

High-density polyethylene compositions, method of making the same

A Ziegler-Natta procatalyst composition in the form of solid particles and comprising magnesium, halide and transition metal moieties, said particles having an average size (D50) of from 10 to 70 &#x3bc;m, characterized in that at least 5 percent of the particles have internal void volume substantially or fully enclosed by a monolithic surface layer (shell), said layer being characterized by an average shell thickness/particle size ratio (Thickness Ratio) determined by SEM techniques for particles having particle size greater than 30 &#x3bc;m of greater than 0.2.

Robust spray-dried ziegler-natta procatalyst and polymerization process employing same

The instant invention is a high-density polyethylene composition, method of producing the same, closure devices made therefrom, and method of making such closure devices. The high-density polyethylene composition according to the present invention comprises (a) a first component comprising a high molecular weight ethylene alpha-olefin copolymer having a density in the range of 0.927 to 0.938 g/cm3, and a melt flow rate (I21) in the range of 4 to 10 g/10 minutes, and (b) a second component comprising a low molecular weight ethylene polymer having a density in the range of 0.960 to 0.975 g/cm3, and a melt index (I2) in the range of 100 to 1200 g/10 minutes; and wherein the high-density polyethylene composition has a melt index (I2) in the range of from 2 to 10 g/10 minutes, a density in the range of from 0.950 to 0.960 g/cm3, and a flow direction shrinkage to cross flow direction shrinkage ratio in the range of from 2 to 3.2, and an environmental stress crack resistance (ESCR) (F50) according to ASTM D-1693, condition B at 50&#xb0; C., and using 10 percent Branched Octylphenoxy Poly(Ethyleneoxy) Ethanol, in the range of equal to or greater than 50 hours.

High-density polyethylene compositions, method of producing the same, closure devices made therefrom, and method of making such closure devices

Growing community of inventors

Charleston, WV, United States of America

Stephanie M Whited