Dow Global Technolgoies LLC

Hayley A Brown

John O Osby

Jose Ortega

Bharat Indu Chaudhary

Kalyan Sehanobish

Mehmet Demirors

Teresa Plumley Karjala

Brian W Walther

Sarat Munjal

Christopher R Eddy

Carmelo Declet Perez

David T Gillespie

Lori L Kardos

James L Cooper

Zachary L Polk

Jian Jim Wang

Otto J Berbee

Bin Li

Arkady L Krasovskiy

Jorge Caminero Gomes

Stefan Hinrichs

Xiao Bing Yun

Cristina Serrat

Santosh S Bawiskar

Harpreet Singh

Amira A Marine

Jichang Feng

Edward L Lee

Viraj Shah

Sydney E Hansen

Brian Dorvel

Jian Wang

Charles J DuBois, Jr

Renata De Oliveria Pimentel

Cornelis FJ Den Doelder

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

The present disclosure provides embodiments of an asphalt composition and methods of making that may include asphalt binder; a recycled polymer component; an epoxy-functionalized ethylene copolymer, the epoxy-functionalized ethylene copolymer having the formula E/X/Y/Z. E may be a copolymer unit —(CHCH)— derived from ethylene; X may be a copolymer unit —(CHCRR)—, where Ris hydrogen, methyl, or ethyl, and Ris carboalkoxy, acyloxy, or alkoxy of 1 to 10 carbon atoms, present in from 0 to about 40 weight % of the copolymer; Y may be a copolymer unit —(CHCRR)—, where Ris hydrogen or methyl and Ris carboglycidoxy or glycidoxy present in from 0 to about 25 weight % of the copolymer; Z may be a copolymer derived from comonomers including carbon monoxide, sulfur dioxide, acrylonitrile, or other monomers, present from 0 to about 10 weight % of the copolymer.

Asphalt compositions including recycled polymer and epoxy-functionalized ethylene copolymer

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 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

The present invention provides polymer blends that can be used in a multilayer structure and to multilayer structures comprising one or more layers formed from such blends. In one aspect, a polymer blend comprises a copolymer comprising ethylene and at least one of methyl acrylate and ethyl acrylate having an acrylate content of 5 to 40 weight percent based on the weight of the copolymer and having a melt index (I) of 1 to 60 g/10 minutes, wherein the total amount of ethylene methyl acrylate copolymer and ethylene ethyl acrylate copolymer comprises 45 to 99 weight percent of the blend based on the total weight of the blend, and a polyolefin having a density of 0.870 g/cmor more and having a melt index (I) of 20 g/10 minutes or less, wherein the polyolefin comprises 1 to 55 weight percent of the blend based on the total weight of the blend.

Polymer blends for use in multilayer structure and multilayer structures comprising the same

Laminate film structures including an adhesive layer having gas and moisture barrier properties are disclosed. The disclosed laminate film structures comprise films bonded together with an adhesive composition, the adhesive composition having barrier properties, e.g., controlling oxygen and/or water vapor transmission rates. The disclosed laminate film structures comprise films made from polymers and/or metallized polymers whereby the weight, thickness, and/or number of film layers has been reduced by using a barrier adhesive in place of a standard adhesive while still achieving similar barrier properties. Methods for forming laminate structures having a desired barrier performance are also disclosed, the methods comprising determining the desired barrier performance of the laminate structure, selecting a barrier adhesive, selecting two or more film layers, including at least a first film layer and a second film layer, applying the barrier adhesive on a surface of the first film layer, and bringing a surface of the second film layer into contact with the barrier adhesive applied on the surface of the first film layer, thereby forming the laminate structure having a desired barrier performance.

Laminate film structures having barrier adhesive layer

A composition suitable for making uncrosslinked polyethylene foam and an uncrosslinked polyethylene foam comprising: 50-95 wt. % of a low density polyethylene having a density ranging from 0.915 to 0.930 g/cc and melt index of 1-4 g/10 min; and 5-50 wt. % of an ethylene/alpha-olefin interpolymer having: a density ranging from 0.910-0.930 g/cc; a melt index ranging from 0.5 to 6.0 g/10 min; a Mw/Mn of from 2.8 to 4.5; and a ZSVR of 1.8 to 10.0.

Compositions suitable for manufacturing polyethylene foam, and articles thereof

The present invention provides polymer blends that can be used in a multilayer structure and to multilayer structures comprising one or more layers formed from such blends. In one aspect, a polymer blend comprises an ionomer of a copolymer comprising ethylene and at least one of acrylic acid and methacrylic acid having a melt index (I) of 1 to 60 g/10 minutes, wherein the total amount of ionomer comprises 50 to 99 weight percent of the blend based on the total weight of the blend, and a polyolefin having a density of 0.870 g/cmor more and having a melt index (I) of 20 g/10 minutes or less, wherein the polyolefin comprises 1 to 50 weight percent of the blend based on the total weight of the blend, wherein the polymer blend meets the following equation: 3.5&#x3c;2.76&#x2212;60*I+308*RVR+0.023*A&#x3c;4.5 wherein Iis the melt index (I) of the polyolefin, RVR is the relative viscosity ratio of the polyolefin to the ionomer (I/I), and A is the weight percent of ionomer in the polymer blend based on the total weight of the blend.

Embodiments are directed to a tie layer composition comprising functionalized polyethylene, styrene block copolymer, base polyethylene, and antioxidant co-stabilizers, wherein the antioxidant co-stabilizers comprise at least one oxygen scavenger, at least one peroxy free radical scavenger, and at least one alkyl free radical scavenger. Further embodiments are directed to multilayer films or sheets which include the tie layer composition.

Tie layer compositions and multilayer films incorporating the same

A high pressure polymerization process to form an ethylene-based polymer, the process comprising at least the following step: polymerizing a reaction mixture comprising ethylene and at least one comonomer, using a reactor system comprising a reactor configuration, and the following: (A) at least two reaction zones, a zone (reaction zone 1) and an ith zone (reaction zone i where i&#x2265;2), (B) at least two ethylene-based feed streams, each comprising a percentage of the total make-up ethylene fed to the polymerization process, and wherein a first stream is sent to reaction zone 1 and a second stream is sent to reaction zone i; (C) a control system to control the percentage of the total make-up ethylene in the stream sent to reaction zone 1, and the percentage of the total make-up ethylene in the stream sent to reaction zone i, and wherein the ratio (Q) of the molar concentration of the at least one comonomer fed to the first reaction zone, to the molar concentration of comonomer in the sum of all ethylene-based feeds to the reactor configuration, meets the following Equation 1: 0.23 ln(r1)&#x2212;2.16&#x2264;Q&#x2264;&#x2212;0.25 ln(r1)+2.15 (Equation 1); and wherein the comonomer has a reactivity ratio (r1) as follow: 0.3&#x2264;r1&#x2264;5.0, and a boiling point (1 atm)&#x2264;150&#xb0; C.

Process for making high pressure free radical ethylene copolymers

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.

The invention provides a composition comprising an ethylene-based polymer, wherein the ethylene-based polymer comprises the following properties: a) a Mw(abs)/Mw(conv) &#x3e;2.60; and b) a CDFR(at Mw&#x3c;10,000 g/mole) &#x3e;0.145.

Ethylene-based polymers and processes to make the same

A composition comprising an ethylene-based polymer, which comprises the following properties: a) (Mw(abs)/Mw(conv)&#x2212;2.00)*(100,000 g/mol/Mw(abs))*CDF?IR #191 (MW&#x2264;10,000 g/mol)&#x2265;0.030; and b) a melt index (I2) from 0.30 to 2.50 g/10 min.

Growing community of inventors

Houston, TX, United States of America

Hayley A Brown