Dow Global Technolgoies LLC

The Dow Chemical Company

Trevira Gmbh

Pbbpolisur S.r.l.

Dow Quimica De Colombia S.a.

Dow Brasil S.a.

Dow Brazil S.a.

Mehmet Demirors

Teresa Plumley Karjala

Mridula Babli Kapur

Philip P Fontaine

Jian Jim Wang

Yijian Lin

Rajen M Patel

Sarat Munjal

Pradeep Jain

Sylvie Y Desjardins

Jerzy Klosin

Sean W Ewart

Ruth Figueroa

Christopher R Eddy

Douglas S Ginger

Linfeng Chen

Lonnie G Hazlitt

Selim Bensason

Nilesh R Savargaonkar

David T Gillespie

Rongjuan Cong

Sanjib Biswas

Wallace W Yau

Didem Oner-Deliormanli

Sarah M Hayne

Joshua B Gaubert

Otto J Berbee

John O Osby

Theresa J Hermel-Davidock

Xiao Bing Yun

Cristina Serrat

Pulikkottil Jacob Thomas

Mustafa Bilgen

Lawrence J Effler, Jr

Pak-Meng Cham

Nicolas Cardoso Mazzola

Carl N Iverson

Duane B Priddy, Sr

Andrew T Heitsch

Timothy Wayne Gambrel

Yunwa Wilson Cheung

Yi Jin

Jorge Caminero Gomes

Endre Szuromi

Andrew J Young

Michael D Turner

Jose Eduardo Ruiz

Susan G Brown

Vivek Kalihari

John W Garnett, Iv

Phillip Dene Hustad

Roger L Kuhlman

Kim Louis Walton

Ronald Wevers

Cornelis F J Den Doelder

Stefan Hinrichs

Lori L Kardos

Seema V Karande

Thomas Oswald

Chau Van Vo

Ayush A Bafna

Kurt Frederick Hirsekorn

Jianping Pan

Gagan Saini

Alexander Williamson

Hayley A Brown

Kyung W Suh

Peter N Nickias

Bin Li

Arkady L Krasovskiy

Karlheinz Hausmann

Jeffrey D Weinhold

Brian W Kolthammer

Shaofu Wu

Jill M Martin

Richard J Keaton

David Gordon Barton

James L Cooper

Alec Y Wang

Rahul Sharma

Michael O Myers

Jacquelyn A Degroot

John A Naumovitz

Fabricio Arteaga Larios

Marc A Springs

Zhe Zhou

Michael Joseph Zogg, Jr

Bruce A King

Wayde V Konze

Angela N Taha

Peter Hermann Roland Sandkuehler

Gert Johannes Claasen

Curvel Hypolite

Joseph L Deavenport

Jong Young Lee

Hien Q Do

Johnathan E DeLorbe

Ivan A Konstantinov

Jason C Brodil

Carmelo Declet Perez

Embodiments are directed to a method of making an olefin-based polymer by free-radical polymerization in a reactor system. The method includes initiating a free-radical polymerization of an olefin-based monomer, propagating growth of the olefin-based polymer during continued free-radical polymerization of the olefin-based monomer, and adding to the reactor system a chain transfer agent that terminates the growth of the olefin-based polymer. The chain transfer agent includes a silane. Examples of suitable silanes are: triethylsilane, diethylmethylsilane, tris(trimethylsilyl)silane, n-butylsilane, dimethylphenylsilane, phenylsilane, chlorodimethylsilane, diisopropylaminosilane, 1,2-bis(dimethylsilyl) benzene, 1,3-bis(dimethylsilyl) benzene, 1,4-bis(dimethylsilyl)benzene, 1,1, 3,3-tetramethyldisiloxane, trimethylsilane, (trimethylsilyl)dimethylsilane, and bis(trimethylsilyl)methylsilane.

Substituted silanes as chain transfer agents for polyolefin production

Polyethylene compositions are disclosed that may have a density of 0.910 g/cmto 0.924 g/cmand a melt index (I) In of 0.1 g/10 minutes to 0.5 g/10 minutes and include a first polyethylene fraction area in the temperature range from 45° C. to 80° C. of an elution profile via improved comonomer composition distribution (iCCD) analysis method; a second polyethylene fraction area in the temperature range from 80° C. to 95° C. of the elution profile, and a third polyethylene fraction area in the temperature range from 95° C. to 110° C. of the elution profile. The second polyethylene fraction area may include at least 5% of the total area of the elution profile. The third polyethylene fraction area may include at least 25% of the total area of the elution profile. A ratio of the first polyethylene fraction area to the second polyethylene fraction area may be from 6 to 15.

Polyethylene compositions and films including polyethylene compositions

A film includes 20.0 weight percent to 69.5 weight percent of a linear low density polyethylene (LLDPE) based polymer. The LLDPE having a high density fraction (HDF) from 3.0% to 8.0%, an I/Iratio from 5.5 to 6.9, and a short chain branching distribution (SCBD) of less than or equal to 8.0° C. The film also includes 0.0 weight percent to 10.0 weight percent low density polyethylene (LDPE) based polymer, and 30.0 weight percent to 70.0 weight percent pore former.

Polymer-based film with balanced properties

Embodiments of multilayer films are disclosed comprising a first layer comprising polyethylene, a second layer comprising a first medium density polyethylene; a barrier layer; a third layer comprising a second medium density polyethylene; and a fourth layer comprising polyethylene. The second layer may be positioned between the first layer and the barrier layer. The barrier layer may be positioned between the second layer and the third layer.

Multilayer films comprising polyethylene and barrier layers and methods of producing the same

The present invention relates to oriented, multilayer polyethylene films. In one aspect, a biaxially oriented, multilayer polyethylene film comprises at least one layer comprising: (1) a polyethylene-based composition that comprises: (a) at least 97% by weight, based on the total weight of the polyethylene-based composition, of a polyethylene composition comprising: (i) from 25 to 37 percent by weight of a first polyethylene fraction having a density in the range of 0.935 to 0.947 g/cmand a melt index (I) of less than 0.1 g/10 minutes; and (ii) from 63 to 75 percent by weight of a second polyethylene fraction; and (b) 20 to 5000 ppm, based on the total weight of the polyethylene-based composition of a nucleating agent, wherein the nucleating agent comprises a calcium salt of 1,2-cyclohexanedicarboxylic acid or sodium 4-[(4-chlorobenzoyl) amino] benzoate; wherein the polyethylene composition has less than 0.10 branches per 1,000 carbon atoms when measured usingC NMR, wherein the density of the polyethylene-based composition is at least 0.965 g/cm, and wherein the melt index (I) of the polyethylene-based composition is 0.5 to 10 g/10 minutes.

Oriented polyethylene films and articles comprising the same

The present invention is directed to polyethylene-based compositions suitable for packaging applications, films, and articles. The polyethylene-based composition according to embodiments disclosed herein includes a polyethylene composition having a first polyethylene fraction and a second polyethylene fraction as well as a calcium salt of 1,2-cyclohexanedicarbodylic acid. The polyethylene-based composition can deliver a balance of properties, including barrier properties, for packaging applications.

Polyethylene-based compositions and films and articles comprising the same

A first oriented film comprising a first polyethylene composition which comprises: from 20 to 50 wt % of a first linear low density polyethylene polymer having a density greater than 0.925 g/cc and an Ilower than 2 g/10 min; and from 80 to 50 wt % of a second linear low density polyethylene polymer having a density lower than or equal to 0.925 g/cc and an Igreater than or equal to 2 g/10 min; wherein the first polyethylene composition has an Ifrom 0.5 to 10 g/10 min and a density from 0.910 to 0.940 g/cc is provided.

Oriented polyethylene films and a method for making the same

Disclosed is a curly fiber having a fiber centroid and comprising a first region having a first centroid and a second region wherein the first region comprises an ethylene/alpha olefin interpolymer composition in an amount of at least 75 weight percent based on total weight of the first region and wherein the ethylene/alpha olefin interpolymer composition is characterized by a low temperature peak and a high temperature peak on an elution profile via improved comonomer composition distribution (ICCD) procedure, and a full width at half maximum of the high temperature peak is less than 6.0° C. and the second region is a material comprising a polymer which is different from the ethylene/alpha-olefin interpolymer of the first region and wherein the regions are arranged such that at least one of the first centroid and the second centroid is not the same as the fiber centroid.

Crimped multi-component fibers

A nonwoven fabric comprises at least one fiber having a first component prepared from at least 75 wt. % of bimodalethylene/alpha-olefin interpolymer composition, wherein the ethylene/alpha-olefin interpolymer composition is characterized by: a density in the range of 0.930 to 0.965 g/cm, a melt index (I2) in the range of from 10 to 60 g/10 minutes, wherein the I2 is measured according to ASTM D1238, 190 C, 2.16 kg, a molecular weight distribution, expressed as the ratio of the weight average molecular weight to number average molecular weight (M/M) as determined by GPC of from 1.5 to 2.6, a tan delta at 1 radian/second of at least 45, a low temperature peak and a high temperature peak on an elution profile via improved comonomer composition distribution (ICCD) procedure, and a full width at half maximum of the high temperature peak is less than 6.0° C.

Non-woven fabric having ethylene/alpha-olefin polymer fibers

Embodiments of the present disclosure are directed to multilayer films. Embodiments of the multilayer films may include a first layer comprising a first polyolefin, a second layer comprising a second polyolefin, a third layer comprising a third polyolefin, fourth layer comprising a fourth polyolefin, and a fifth layer comprising a fifth polyolefin. The second layer may be positioned between the first layer and the third layer; the third layer may be positioned between the second layer and the fourth layer; and the fourth layer may be positioned between the third layer and the fifth layer. Two or more of the first polyolefin, second polyolefin, third polyolefin, and fourth polyolefin may be the same or different. The third polyolefin may be a polyethylene composition having a density of 0.924 g/cmto 0.936 g/cmand a melt index (I) of 0.25 g/10 minutes to 2.0 g/10 minutes.

Multilayer films that include at least five layers and methods of producing the 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 cast film inducing a bimodal ethylene-based polymer having a high density fraction (HDF) from 3.0% to 10.0%, an I/Iratio from 5.5 to 7.0, a short chain branching distribution (SCBD) less than or equal to 10° C., a density from 0.910 g/cc to 0.920 g/cc, and a melt index (I) from 1.0 g/10 mins to 8.0 g/10 mins.

Cast films comprising bimodal ethylene-based polymers having high molecular weight high density fractions

An ethylene-based polymer formed from reacting at least the following: ethylene and at least one asymmetrical polyene, of Structure 1, as described herein.

Ethylene-based polymers with improved melt strength and thermal stability

A bimodal ethylene-based polymer, including a high density fraction (HDF) from 3.0% to 25.0%, wherein the high density fraction is measured by crystallization elution fractionation (CEF) integration at temperatures from 93° C. to 119° C., an I/Iratio from 5.5 to 7.5, wherein Iis the melt index when measured according to ASTM D 1238 at a load of 2.16 kg and temperature of 190° C. and Iis the melt index when measured according to ASTM D 1238 at a load of 10 kg and temperature of 190° C., and a short chain branching distribution (SCBD) less than or equal to 10° C., wherein the short chain branching distribution is measured by CEF full width at half height.

Bimodal ethylene-based polymers having high molecular weight high density fractions

A blown film having a bimodal ethylene-based polymer including a high density fraction (HDF) from 3.0% to 25.0%, an I/Iratio from 5.5 to 7.5, a short chain branching distribution (SCBD) less than or equal to 10 C, a zero shear viscosity ratio from 1.0 to 2.5, a density from 0.902 g/cc to 0.925 g/cc, and a melt index (I) from 0.5 g/10 mins to 2.0 g/10 mins.

Blown films comprising bimodal ethylene-based polymers having high molecular weight high density fractions

Growing community of inventors

Pearland, TX, United States of America

Mehmet Demirors