Dow Global Technolgoies LLC

Rohn and Haas Company

Christopher R Eddy

Sarat Munjal

Mehmet Demirors

Teresa Plumley Karjala

John O Osby

Otto J Berbee

Wallace W Yau

Lonnie G Hazlitt

Sean W Ewart

Stefan Hinrichs

Bharat Indu Chaudhary

Pak-Meng Cham

Kalyan Sehanobish

Jose Ortega

Hayley A Brown

Jian Jim Wang

Cornelis J Hosman

Werner Zschoch

Christopher W Conrad

Arkady L Krasovskiy

David T Gillespie

Saurav S Sengupta

Thomas Oswald

Richard J Keaton

Manish Talreja

Robert Wilczynski

Rajesh P Paradkar

Alfred E Vigil, Jr

Jeffery S Bradley

Bryan Gutermuth

Jian Wang

Kevin Paul Rogers

Bruce Michael Hasch

Lan T P Hoang Nguyen

Andrea M Rhodius

Wallace Yau

Otto Berbee

Alfred Vigil

A copolymer of ethylene and hydrolysable silane includes from 0.1 wt % to 5.0 wt % hydrolysable silane groups and has a Mz(abs)/Mw(abs) of less than or equal to 9.5; a ratio of Mz(abs)/Mw(abs) to polydispersity of less than or equal to 1.5; a polydispersity of 6.6 or greater; a Density×Polydispersity of 6.0 or greater; or an Amorphous Content at Room Temperature×Polydispersity of 360 or greater. Methods for forming a moisture-crosslinkable polymer composition include forming a copolymer of ethylene and hydrolysable silane at a polymerization temperature of greater than or equal to 180° C. to less than or equal to 400° C. at a pressure from 5,000 psi to 50,000 psi; and adding a silanol condensation catalyst to the copolymer of ethylene and hydrolysable silane.

Moisture crosslinkable copolymers of ethylene and hydrolysable silane

An insulated wire or cable is made by a process comprising the steps of:

Process for making crosslinked cable insulation using high melt strength ethylene-based polymer made in a tubular reactor and optionally modified with a branching agent

An insulated wire or cable is made by a process comprising the steps of: (A) extruding onto a covered or uncovered metal conductor or optical fiber a composition having a DF measured at 130&#xb0; C. (60 Hz, 2 kV) or 120&#xb0; C. (60 Hz, 8 kV) or 100&#xb0; C. (60 Hz, 8 kV) of &#x3c;0.5% and comprising: (1) a high melt strength ethylene-based polymer made in a tubular reactor, and (2) a peroxide, and (B) crosslinking the high melt strength ethylene-based polymer.

A composition comprising an ethylene-based polymer is made by a process comprising the steps of: (A) contacting under first polymerization conditions at least ethylene and at least one molecular catalyst to form a first ethylene-based polymer, and (B) contacting under second polymerization conditions the first ethylene-based polymer of (A) with at least additional ethylene and a carbon-carbon free radical initiator of Structure (I): wherein R, R, R, R, Rand Rare each, independently, hydrogen or a hydrocarbyl group and wherein, optionally, two or more R groups (R, R, R, R, Rand R) form a ring structure, with the proviso that at least one of Rand R, and at least one of Rand Ris a hydrocarbyl group of at least two carbon atoms, to form the composition.

Process for making ethylene-based polymers using carbon-carbon free radical initiators

A process to form an ethylene-based polymer comprising, in polymerized form, ethylene and at least one acid comonomer, said process comprising polymerizing a reaction mixture comprising the ethylene and the acid comonomer, in a reactor configuration comprising at least one Secondary compressor, at least one pressurization device, and at least one reactor selected from the following: at least one autoclave reactor, at least one tubular reactor, or a combination thereof; and wherein the reaction mixture is polymerized in the presence of at least one free-radical initiator, and at a pressure of at least 1000 Bar; and wherein at least a portion of a comonomer composition comprising at least a portion of the acid comonomer used in the polymerization, is compressed, to form a compressed comonomer composition, in the pressurization device, up to a discharge pressure ranging from 1000 Bar to 4000 Bar, and at a discharge temperature (DT) from 10 C to 100 C; and wherein the compressed comonomer composition bypasses the Secondary compressor, and is fed, downstream from the Secondary compressor, into the reactor, and/or into one or more feed streams to the reactor.

High pressure free-radical polymerizations

A process to form an ethylene-based polymer including polymerizing ethylene and at least one asymmetrical polyene comprising an 'alpha, beta unsaturated-carbonyl end' ('&#x3b1;,&#x3b2; unsaturated-carbonyl end') and a &#x201c;C&#x2014;C double bond end,&#x201d; wherein the polymerization takes place in the presence of at least one free-radical initiator; and wherein the polymerization takes place in a reactor configuration comprising at least two reaction zones, reaction zone 1 and reaction zone i (i&#x2265;2), wherein reaction zone i is downstream from reaction zone 1.

Processes to form ethylene-based polymers using asymmetrical polyenes

A composition comprising an ethylene-based polymer, the ethylene-based polymer having the following properties: a) at least one incorporated structure derived from a polyene selected from the group consisting of i) through x), as described herein; and b) a Mw(abs) versus Irelationship: Mw(abs)&#x3c;A+B(I2), wherein A=2.40&#xd7;10g/mole and B=&#x2212;8.00&#xd7;10(g/mole)/(dg/min). A composition comprising an ethylene-based polymer, the ethylene-based polymer comprising at least one incorporated structure derived from a polyene selected from the group consisting of i) through x), as described herein, wherein the polymer is formed in a reactor configuration comprising at least one tubular reactor.

Ethylene-based polymers formed using asymmetrical polyenes

A process to form a composition comprising an asymmetrical polyene, the asymmetrical polyene comprising an '&#x3b1;,&#x3b2; unsaturated-carbonyl end' and a 'C&#x2014;C double bond end,' the process comprising: reacting an alkene- or polyene-containing alcohol with an alkyl ester of an &#x3b1;,&#x3b2; unsaturated carboxylic acid in the presence of at least the following components A) through C) to form a solution comprising an asymmetrical polyene: A) a lithium salt; B) a component selected from the group consisting of hydroquinone, an alkyl-substituted phenol, a substituted alkyl-substituted phenol, an alkyl-substituted hydroquinone, a substituted alkyl-substituted hydroquinone, and combinations thereof; and C) an N-oxyl-containing compound; wherein the &#x201c;&#x3b1;,&#x3b2; unsaturated-carbonyl end&#x201d; of the asymmetrical polyene is selected from the group consisting of structures a) through c), as described herein, and wherein the &#x201c;C&#x2014;C double bond end&#x201d; of the asymmetrical polyene is selected from the group consisting of structures 1) through 17), as described herein.

Inhibitor combination for lithium salt-catalyzed transesterification process and method for removing lithium salt

An ethylene-based polymer, e.g., LDPE, with a low dissipation factor is made by a process comprising the step of contacting at polymerization conditions ethylene and, optionally, one or more comonomers, e.g., an alpha-olefin, with at least one carbon-carbon (C&#x2014;C) hydrocarbyl, free-radical initiator of Structure 1: wherein R, R, R, R, Rand R, are each, independently, hydrogen or a hydrocarbyl group and wherein, optionally, two or more R groups (R, R, R, R, Rand R) form a ring structure, with the provisos that at least one of Rand R, and at least one of Rand Ris a hydrocarbyl group of at least two carbon atoms, e.g., an alkaryl of at least seven carbon atoms.

Process for making ethylene-based polymers using hydrocarbon initiators

The invention provides a process to form an ethylene-based polymer, said process comprising polymerizing ethylene and at least one asymmetrical polyene, comprising an 'alpha, beta unsaturated&#x2014;carbonyl end' and a 'C&#x2014;C double bond end,' and wherein the polymerization takes place in the presence of at least one free-radical initiator, and wherein the polymerization takes place in a reactor configuration comprising at least two reaction zones, reaction zone I and reaction zone i (i&#x3e;2), wherein reaction zone I is downstream from reaction zone I; and wherein at least one chain transfer agent (CTA) is added to the polymerization, and wherein the CTA is a saturated hydrocarbon or an unsaturated hydrocarbon.

Processes to improve reactor stability for the preparation of ethylene-based polymers using asymmetrical polyenes

A process to form an ethylene-based polymer including polymerizing ethylene and at least one asymmetrical polyene comprising an 'alpha, beta unsaturated-carbonyl end' ('&#x3b1;,&#x3b2;-unsaturated-carbonyl end') and a &#x201c;C&#x2014;C double bond end,&#x201d; wherein the polymerization takes place in the presence of at least one free-radical initiator; and wherein the polymerization takes place in a reactor configuration comprising at least two reaction zones, reaction zoneand reaction zone i (i&#x3e;2), wherein reaction zone i is downstream from reaction zone

An ethylenic polymer comprising amyl groups from about 0.1 to about 2.0 units per 1000 carbon atoms as determined by Nuclear Magnetic Resonance and both a peak melting temperature, T, in &#xb0; C., and a heat of fusion, H, in J/g, as determined by DSC Crystallinity, where the numerical values of Tand Hcorrespond to the relationship T&#x2267;(0.2143*H)+79.643. An ethylenic polymer comprising at least one preparative TREF fraction that elutes at 95&#xb0; C. or greater using a Preparative Temperature Rising Elution Fractionation method, where at least one preparative TREF fraction that elutes at 95&#xb0; C. or greater has a gpcBR value greater than 0.05 and less than 5 as determined by gpcBR Branching Index by 3D-GPC, and where at least 5% of the ethylenic polymer elutes at a temperature of 95&#xb0; C. or greater based upon the total weight of the ethylenic polymer.

Long chain branched (LCB), block, or interconnected copolymers of ethylene in combination with one other polymer

Disclosed is an ethylene-based polymer with a density from about 0.90 to about 0.94 in grams per cubic centimeter, with a molecular weight distribution (M/M) from about 2 to about 30, a melt index (I) from about 0.1 to about 50 grams per 10 minutes, and further comprising sulfur from about 5 to about 4000 parts per million. The amount of sulfur is also determined based upon the total weight of the ethylene-based polymer. Also disclosed is process for making an ethylene-based polymer which includes the steps of splitting a process fluid for delivery into a tubular reactor; feeding an upstream process feed stream into a first reaction zone and at least one downstream process feed stream into at least one other reaction zone, where the process fluid has an average velocity of at least 10 meters per second; and initiating a free-radical polymerization reaction.

High pressure low density polyethylene resins with improved optical properties produced through use of highly active chain transfer agents

A process is taught, comprising polymerizing ethylene in the presence of a catalyst to form a crystalline ethylene-based polymer having a crystallinity of at least 50% as determined by DSC Crystallinity in a first reactor or a first part of a multi-part reactor and reacting the crystalline ethylene-based polymer with additional ethylene in the presence of a free-radical initiator to form an ethylenic polymer in at least one other reactor or a later part of a multi-part reactor.

Growing community of inventors

Lake Jackson, TX, United States of America

Christopher R Eddy