The Dow Chemical Company

Dow Global Technolgoies LLC

Other

Advanced Design Concept Gmbh

Pak-Wing Steve Chum

Shih-Yaw Lai

George W Knight

Rajen M Patel

Ronald P Markovich

Li-Min Tau

James C Stevens

Pradeep Jain

Lonnie G Hazlitt

Kalyan Sehanobish

Selim Bensason

Seema V Karande

Lee Spencer

Larry Alan Meiske

John R Wilson

Jacquelyn A deGroot

Kim Louis Walton

Jozef Van Dun

Fumio Matsushita

Akira Miyamoto

Yunwa Wilson Cheung

Thoi H Ho

Chung P Park

Clive P Bosnyak

Martin J Guest

Shaofu Wu

Rexford Allison Maugans

Grant B Jacobsen

John J Gathers

Jeffrey J Wooster

Lawrence T Kale

Todd J Obijeski

Miriam P Ripplinger

Leonie K Walsh

Wenbin Liang

Brian W Kolthammer

Mark Alan Barger

Kenneth W Anderson

Thomas Oswald

Michael E Rowland

Wendy D Hoenig

Robert R Turley

Alan R Whetten

Nicole F Whiteman

David A Eversdyk

Kyle G Kummer

Rona L Reid

Patrick J Schouterden

Peter L Wauteraerts

John E Lastovica, Jr

Werner Wagner

James J Hill

Rebecca J Sawchuk

Ed N Knickerbocker

Ian M Munro

Jacquelyne A Degroot

Antonio Torres

Kurt W Swogger

Kimberly S Houchens

Francis J Timmers

Stephen F Hahn

Deepak R Parikh

Leonardo C Lopez

Johan A Thoen

Kevin E Howard

Chung Poo Park

Grant Berent Jacobsen

Daniel James Falla

John Kalevi Kaarto

Chia-Hsi Chu

Robert H Kelch

Thomas Allgeuer

Calvin P Esneault

James E Schuetz

Brian W S Kolthammer

Xuming Chen

Lisa S Madenjian

Jozef J I Van Dun

Thuan P Dixit

William R Van Volkenburgh

Thomas J McKeand

Kaelyn C Koch

Moris Amon

George P Clingerman

William C Sumner

Luc Bosiers

Evgueni Rozenbaoum

Kevin D Sikkema

Timothy E Clayfield

Debra H Niemann

Klye G Kummer

Wasif Ahmed Khan

Larry A Meiski

Thomas T Allgeuer

Thuan Phung Dixit

The fluoropolymer compositions of the present invention generally incorporate ingredients comprising one or more fluoropolymers, an ultraviolet light protection component (hereinafter UV protection component), and optionally one or more additional ingredients if desired. The UV protection component includes a combination of at least one hindered tertiary amine (HTA) compound having a certain structure and a weight average molecular weight of at least 1000. This tertiary amine is used in combination with at least one organic, UV light absorbing compound (UVLA compound) having a weight average molecular weight greater than 500. When the HTA compound and the UVLA compound are selected according to principles of the present invention, the UV protection component provides fluoropolymer compositions with significantly improved weatherability characteristics for protecting underlying materials, features, structures, components, and/or the like. In particular, fluoropolymer compositions incorporating the UV protection component of the present invention have unexpectedly improved ability to resist blackening, coloration, or other de gradation that may be caused by UV exposure. As a consequence, devices protected by these compositions would be expected to have dramatically improved service life. The compositions have a wide range of uses but are particularly useful for forming protective layers in optoelectronic devices.

Optoelectronic devices incorporating fluoropolymer compositions for protection

The present invention relates to a multi-layer oriented shrink film comprising at least one skin layer comprising a polystyrene material and at least one core layer comprising a polyolefin layer. The films are preferably primarily oriented in either the machine or the cross direction. These films are ideally suited for use as a shrink label which can be applied either as a CD shrink sleeve or applied using a continuous roll process. The films ideally have an overall density of less than 1.0 g/cm, to facilitate recycling efforts.

Oriented multi-layer shrink labels

The invention provides blends comprising an ethylene copolymer formed from ethylene with at least one comonomer selected from (a) the group comprising compounds represented by the formula HC&#x2550;CHR wherein R represents a C-Clinear, branched or cyclic alkyl group or a C-Caryl group, and (b) a C-Clinear, branched or cyclic diene. Each copolymer has a specific density, a specific molecular weight distribution, and a specific comonomer content distribution characteristic.

Ethylene copolymers and blend compositions

Blend compositions containing a novel homopolymer, the use of which allows the incorporation of more comonomer in the additional components of the blend (for the same overall density) resulting in increased tie molecule formation and improvement in properties such as ESCR, toughness and impact strength are disclosed. The homopolymers are important for applications where a high density is needed to ensure certain mechanical properties like abrasion resistance, indentation resistance, pressure resistance, topload resistance, modulus of elasticity, or morphology (for the chlorination of PE to CPE) and additional advantages such as melt processability. The blend can be obtained by dry or melt mixing the already produced components, or through in-situ production by in parallel and/or in series arranged reactors. These resins can be used in applications such as films, blow molded, injection molded, and rotomolded articles, fibers, and cable and wire coatings and jacketings and, various forms of pipe.

High density ethylene homopolymers and blend compositions

A process for the preparation of blends including an ethylene copolymer by copolymerizing ethylene and at least one comonomer selected from a compound represented by the formula HC&#x2550;CHR wherein R is an alkyl group or an aryl group, and a diene, in the presence of a solid catalyst system comprising a support, a transition metal compound and an activator capable of converting the transition metal compound into a catalytically active transition metal complex.

Process for preparing copolymers and blend compositions containing the same

Blend compositions containing a novel homopolymer, the use of which allows the incorporation of more comonomer in the additional components of the blend (for the same overall density) resulting in increased tie molecule formation and improvement in properties such as ESCR, toughness and impact strength are disclosed. The homopolymers are important for applications where a high density is needed to ensure certain mechanical properties like abrasion resistance, indentation resistance, pressure resistance, topload resistance, modulus of elasticity, or morphology (for the chlorination of PE to CPE) and additional advantages such as melt processability. The blend can be obtained by dry or melt mixing the already produced components, or through in-situ production by in parallel and/or in series arranged reactors. These resins can be used in applications such as films, blow molded, injection molded, and rotomolded articles, fibres, and cable and wire coatings and jacketings and, various forms of pipe.

Films with excellent machine direction (MD) tear properties comprise at least one layer made from a polymer comprising: (A) at least 50 weight percent (wt%) propylene; and (B) at least 5 wt % ethylene and/or one or more unsaturated comonomers. Representative of component (B) unsatuarated comonomers are the C&#x3b1;-olefins, Cdienes, styrenic compounds, and the like. Preferably, the film has at least one of a (i) haze value of less than about 10, (ii) 45 degree gloss of greater than about 65, and (iii) dart value of greater than about 100 g/mil. In one preferred embodiment, the layer comprises a compolymer characterized as having at least one of the following properties: (i)C NMR peaks corresponding to a regio-error at about 14.6 and about 15.7 ppm, the peaks of about equal intensity, (ii) a B-value greater than about 1.4 when the comonomer content, i.e., the units derived from ethylene and/or the unsaturated comonomer(s), of the copolymer is at least about 3 wt %, (iii) a skewness index, S, greater than about &#x2212;1.20, (iv) a DSC curve with a Tthat remains essentially the same and a Tthat decreases as the amount of comonomer, i.e., the units derived from ethylene and/or the unsaturated comonomer(s), in the copolymer is increased, and (v) an X-ray diffraction pattern that reports more gamma-forn crystals than a comparable copolymer prepared with a Ziegler-Natta (Z-N) catalyst.

Films comprising isotactic propylene copolymers

Films with excellent machine direction (MD) tear properties comprise at least one layer made from a polymer comprising:

Disclosed are mono-layer or multi-layer films, sheets, or coatings wherein at least on layer comprises a fringed surface microstructure (1), a process for making these items and uses thereof. Further disclosed are articles of manufacture comprising such film, sheet, or coating.

Fringed surface structures obtainable in a compression molding process

The present invention includes a blend composition comprising at least one coupled propylene polymer and at least 55 weight percent of at least one ethylene polymer, based on the total weight of the coupled propylene polymer and the ethylene polymer. The invention also includes methods for making the coupled propylene polymer and methods for making the blend composition. The present invention further includes films made from the blend composition.

Polyethylene rich/polypropylene blends and their uses

Blends and sealant compositions comprising isotactic propylene copolymers

Polymer blends are described that include at least one first ethylene interpolymer and at least one second ethylene interpolymer wherein the difference in the number of carbon atoms in the comonomer of the first interpolymer and the comonomer of the second interpolymer is at least two, wherein the first interpolymer and/or the second interpolymer has molecular weight distribution of from about 1.8 to about 2.8; and wherein the polymer blend has a density greater than or equal to 0.90 g/cm. Articles made from such blends are also disclosed.

Polymer blend and fabricated article made from diverse ethylene interpolymers

Disclosed are mono-layer or multi-layer profiles or moldings wherein at least one layer comprises a fringed surface microstructure, a process for making these items and uses thereof. Further disclosed are articles of manufacture comprising such profile or molding.

Profile or molding having a fringed surface structure

Substantially linear olefin polymers having a melt flow ratio, I/I,&#x2267;5.63, a molecular weight distribution, M/M, defined by the equation: M/M&#x2266;(I/I)&#x2212;4.63, and a critical shear stress at onset of gross melt fracture of greater than about 4&#xd7;10dyne/cmand their method of manufacture are disclosed. The substantially linear olefin polymers preferably have at least about 0.01 long chain branches/1000 carbons and a molecular weight distribution from about 1.5 to about 2.5. The new polymers have improved processability over conventional olefin polymers and are useful in producing fabricated articles such as fibers, films, and molded parts.

Elastic substantially linear olefin polymers

Cast stretch film of interpolymer compositions

Growing community of inventors

Lake Jackson, TX, United States of America

Pak-Wing Steve Chum