Dow Global Technolgoies LLC

The Dow Chemical Company

Pradeep Jain

Mehmet Demirors

Lonnie G Hazlitt

Seema V Karande

Jacquelyn A deGroot

Alec Y Wang

Pak-Wing Steve Chum

Rajen M Patel

Roger L Kuhlman

Kenneth W Anderson

Li-Min Tau

Deepak R Parikh

Jian Jim Wang

Yunwa Wilson Cheung

Mridula Babli Kapur

Kalyan Sehanobish

Philip P Fontaine

Sean W Ewart

David C Kelley

Osborne K McKinney

Kenneth B Stewart

Michael D Turner

Michael Joseph Zogg, Jr

Phillip Dene Hustad

Kim Louis Walton

Gary Robert Marchand

Shih-Yaw Lai

David T Gillespie

Thomas Oswald

Shrikant Dhodapkar

Timothy Wayne Gambrel

John Francis Szul

Yijian Lin

Wesley R Mariott

Jeffrey C Munro

Selim Bensason

Mustafa Bilgen

Ashish Batra

Phuong Anh Cao

Jean-Paul Masy

Shaofu Wu

Ronald P Markovich

Swapnil B Chandak

Harold W Boone

Robert R Turley

Ravindra S Dixit

Gagan Saini

Anthony J Castelluccio

Jorge Rubalcaba

David W Fuchs

Curvel Hypolite

Lawrence T Kale

Angela N Taha

Nicole F Whiteman

Douglas S Ginger

David A Eversdyk

Thomas W Karjala

Laura K Mergenhagen

Jeffrey A Sims

Brandon Fails

Dan G Moldovan

Sharon L Baker

Pak-Meng Cham

Edward O Madenjian

Kyle E Hart

Robert D Swindoll

Lindsey A Clark

Mark Grant Spencer

Kaelyn Koch

Kurt W Swogger

Carlos M Villa

Kishori Deshpande

Robert Thomas Johnston

Che-I Kao

Jose Manu Rego

Joseph L Deavenport

John W Weston

Joshua B Gaubert

Daniela Ferrari

Maria Pollard

Jozef J I Van Dun

Remi A Trottier

Suzanne M Guerra

Frank J Cerk

C Dale Lester

Chuan C He

Hongming Ma

Che I Kao

Viraj Shah

David Lopez

Sharon Baker

Thomas J McKeand

Prasanna K Jog

Job D Guzman

Tianzi Huang

Dana R Breed

Gary A Camp

David Winn Fuchs

Daniel S Rynearson

George W Haun, Jr

Disclosed herein too is a method comprising charging to a reactor system a feed stream comprising a catalyst, a monomer and a solvent; reacting the monomer to form a polymer; where the polymer is contained in a single phase polymer solution; transporting the polymer solution to a pre-heater to increase the temperature of the polymer solution; charging the polymer solution to a liquid-liquid separator; reducing a pressure of the polymer solution in the liquid-liquid separator and separating a polymer-rich phase from a solvent-rich phase in the liquid-liquid separator; transporting the polymer-rich phase to a plurality of devolatilization vessels located downstream of the liquid-liquid separator, where each devolatilization vessel operates at a lower pressure than the preceding devolatilization vessel; and separating the polymer from volatiles present in the polymer rich phase.

Solution polymerization process

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 method of producing bimodal ethylene-based polymer includes reacting ethylene monomer and C-C&#x3b1;-olefin comonomer in the presence of a first catalyst in an agitated reactor to produce a first polymer fraction, and outputting effluent from the agitated reactor. A second catalyst is added to the effluent downstream of the agitated reactor and upstream from a non-agitated reactor, the second catalyst facilitates production of a second polymer fraction having a density and melt index (I) different from the first polymer fraction. The second catalyst and effluent are mixed in at least one mixer. The second catalyst, second polymer fraction, and the first polymer fraction are passed to the non-agitated reactor; and additional ethylene monomer, additional C-C&#x3b1;-olefin comonomer, and solvent are passed to the non-agitated reactor to produce more second polymer fraction and thereby the bimodal ethylene-based polymer.

Process for the production of bimodal ethylene-based polymers having high molecular weight high density fractions

Embodiments of a method of producing a multimodal ethylene-based polymer comprising a first catalyst and a second catalyst in a first solution polymerization reactor and a third catalyst in a second solution polymerization reactor.

Process for the production of multimodal ethylene-based polymers

Disclosed herein is a system for solution polymerization comprising a reactor system that is operative to receive a monomer and to react the monomer to form a polymer; a plurality of devolatilization vessels located downstream of the reactor system, where each devolatilization vessel operates at a lower pressure than the preceding devolatilization vessel; and a heat exchanger disposed between two devolatilization vessels and in fluid communication with them, where the heat exchanger has an inlet port temperature of 100&#xb0; C. to 230&#xb0; C., an outlet port temperature of 200&#xb0; C. to 300&#xb0; C., an inlet port pressure of 35 to 250 kgf/cmand an outlet port pressure of 20 to 200 kgf/cm; and wherein the polymer solution remains in a single phase during its residence in the heat exchanger.

Method and system for polymer production

A spray-dried zirconocene catalyst system comprising a zirconocene catalyst and a hydrophobic fumed silica, which supports the zirconocene catalyst. A spray-drying method of making same. Polyolefins; methods of making and using same; and articles containing same.

Spray-dried zirconocene catalyst system

Artificial turf filaments formed from polyethylene are provided that can have desirable properties. In one aspect, an artificial turf filament comprises a composition comprising a first composition, wherein the first composition comprises at least one ethylene-based polymer and wherein the first composition comprises a MWCDI value greater than 0.9, and a melt index ratio (I10/I2) that meets the following equation: I10/I2&#x2265;7.0&#x2212;1.2&#xd7;log (I2).

Artificial turf filament and articles incorporating same

New ethylene polymers having low levels of long chain branching are disclosed. Films and film layers made form these polymers have good hot tack strength over a wide range of temperatures, making them good materials for packaging applications.

Ethylenic polymer and its use

A composition is provided that comprises at least the following: polymer particles comprising a coating on at least a portion of the total surface of the polymer particles, and wherein the coating is formed from a powder composition comprising at least one inorganic powder, and at least one organic powder selected from a metal stearate and/or a polymer powder, and wherein the weight ratio of the total amount of the inorganic powder to the total amount of the organic powder is from 3.0 to 50.0.

Polymer coatings compositions with reduced ignition sensitivity

A process to form a block copolymer comprising two or more regions or segments of differentiated polymer composition or properties, including feeding a first mixture that includes a chain shuttling agent, a solvent, the one or more monomers, and optionally hydrogen into a first reactor or reactor zone, feeding a second mixture that includes at least one olefin polymerization catalyst and at least one cocatalyst into the first reactor or reactor zone, contacting the first mixture and the second mixture under polymerization conditions in the first reactor or reactor zone to form a reaction mixture that is characterized by the formation of polymer chains from the monomers, allowing polymerization to occur in the first reactor or reactor zone and/or a second reactor or reactor zone to form polymer chains that are differentiated from the polymer chains, such that the resultant polymer has two or more chemically or physically distinguishable blocks.

Process for adding a chain shuttling agent

The invention provides a process to form a composition comprising at least one ethylene-based polymer and at least one oil, said process comprising the following: polymerizing a mixture comprising ethylene, and optionally one or more comonomers, in a reactor system, comprising at least one reactor and at least one mixer, located downstream from the reactor, to form the ethylene-based polymer; and wherein the oil is added to the ethylene-based polymer upstream of the mixer. The invention also provides a reactor system for a process to form a composition comprising at least one ethylene-based polymer and at least one oil, said reactor system comprising at least one reactor, at least one mixer, and an oil feed into the ethylene-based polymer, and wherein the oil feed is located after the reactor and before the mixer.

Process to form oil containing ethylene-based polymers

The invention provides a process to form a 'first composition comprising a first ethylene/&#x3b1;-olefin interpolymer and a second ethylene/&#x3b1;-olefin interpolymer,' said process comprising polymerizing a first mixture comprising ethylene, an &#x3b1;-olefin, and optionally a polyene, in a stirred tank reactor to form a first ethylene/&#x3b1;-olefin interpolymer, and transferring at least some of the first ethylene/&#x3b1;-olefin interpolymer to a loop reactor, and polymerizing, therein, a second mixture comprising ethylene, an alpha-olefin, and optionally a polyene, in the presence of the first ethylene/&#x3b1;-olefin interpolymer, to form the 'first composition comprising the first ethylene/&#x3b1;-olefin interpolymer and the second ethylene/&#x3b1;-olefin interpolymer.' The invention also provides a polymerization reactor configuration comprising at least the following: a stirred tank reactor followed by a loop reactor.

Process to form ethylene/alpha-olefin interpolymers

The invention provides a composition comprising a first composition, comprising at least one ethylene-based polymer, and wherein the first composition comprises a MWCDI value greater than 0.9, and a melt index ratio I10/I2 that meets the following equation: I10/I2&#x2265;7.0&#x2212;1.2&#xd7;log (I2). The invention also provides a process to form a composition comprising at least two ethylene-based polymers, said process comprising the following: polymerizing ethylene, and optionally at least one comonomer, in solution, in the presence of a catalyst system comprising a metal-ligand complex of Structure I, as described herein, to form a first ethylene-based polymer; and polymerizing ethylene, and optionally at least one comonomer, in the presence of a catalyst system comprising a Ziegler/Natta catalyst, to form a second ethylene-based polymer.

Ethylene-based polymer composition for films with improved toughness

Improved reaction processes comprise reacting a mixture to form a product comprising a metal alkyl, metal oxide, or mixture thereof and then passing said product to a post-reactor heat exchanger. The improvement comprises one or more of the following:

Processes to control fouling and improve compositions

An apparatus and method for delivery of additives(s), e.g., catalyst, co-catalyst, scavengers, and/or other reaction- or product-modifying agents, to a reaction or mixing site, such as a reaction vessel, offers the capability for multi-additive delivery and customization of additive selection, flow and flow rate, and if desired, mixing thereof, without production train shutdowns. The invention includes at least two additive sources that are detachably connected, with conduit, to the reaction or mixing site, and a process control means, preferably automated, that is capable of initiating, terminating, and determining the rate of flow from the additive sources.

Multi-additive delivery system

Growing community of inventors

Lake Jackson, TX, United States of America

Pradeep Jain