Dow Global Technolgoies LLC

The Dow Chemical Company

Styron Europe Gmbh

Generon Igs, Inc.

Rohn and Haas Company

John O Osby

Otto J Berbee

Stefan Hinrichs

Teresa Plumley Karjala

Christopher R Eddy

Sarat Munjal

Mehmet Demirors

Bharat Indu Chaudhary

Sean W Ewart

Hayley A Brown

Jose Ortega

Kalyan Sehanobish

Cornelis F J Den Doelder

Thoi H Ho

Saurav S Sengupta

Thomas O Jeanes

Manish Talreja

James L Cooper

Robert Wilczynski

Rajesh P Paradkar

Carmelo Declet Perez

Qian Gou

Jeffery S Bradley

Ivan A Konstantinov

Michael L Smith

John K Sekinger

Jean Paul Chauvel, Jr

Serena K Stephenson

Lan T P Hoang Nguyen

Serena Stephenson

Walter D Leatherwood

John S Hanson

Wenzel P Bartlett

Cornelis FJ Den Doelder

Wenzel Bartlett

Jean Chauvel

John Hanson

Walter Leatherwood

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 copolymerization of ethylene (E) and methoxy polyethylene glycol methacrylate (MPEGMA) produces the copolymer co-E-MPEGMA. These copolymers are distinct from polyethylene, e.g., low density polyethylene (LDPE) grafted with MPEGMA, i.e., g-E-MPEGMA, and are useful in the preparation of insulation sheaths for medium, high and extra-high voltage cables. Such cables exhibit good water tree retardance.

Ethylene-methoxy polyethylene glycol methacrylate copolymers

A high pressure, free radical polymerization process to form an ethylene-based polymer, the process comprising at least the following step: polymerizing a reaction mixture comprising ethylene, using a polymerization system comprising the following: (A) a reactor configuration comprising at least one reactor that comprises at least two reaction zones, a first reaction zone (reaction zone 1) and an ith reaction zone (where i&#x2265;2); wherein the ith reaction zone is the last reaction zone, and wherein i is the total number of reaction zones; (B) at least two ethylene-based feed streams, a first ethylene-based feed stream and an nth ethylene-based feed stream, wherein the first ethylene-based feed stream is sent to the first reaction zone, and the nth ethylene-based feed stream is the last ethylene based feed stream sent to the reactor configuration; wherein n&#x2264;i; and RZn/RZ1 does not equal 1.0, where RZ1=mole fraction of make-up ethylene in the first ethylene-based feed stream to the first reaction zone; where RZn=mole fraction of make-up ethylene in the last ethylene-based feed stream sent to the reactor configuration; (C) a control system to control the percentage of the make-up ethylene in the first ethylene-based feed stream, and the percentage of the make-up ethylene in the nth ethylene-based feed stream; and wherein at least one reaction zone receives a CTA make-up feed stream comprising an alpha-olefin, and wherein the alpha-olefin has a chain transfer activity constant (Cs) value &#x2264;0.10, and wherein the chain transfer activity constant (Cs) is measured at 1360 atm, 130&#xb0; C.

Ethylene-based polymers with new distributions of terminal and internal unsaturations

An ethylene-based polymer formed from reacting at least the following: ethylene and at least one asymmetrical polyene, and wherein the reaction takes place in the presence of at least one free-radical initiator; and wherein the at least one asymmetrical polyene is selected from Structure A, as described herein; Structure B, as described herein; or a combination of Structure A and Structure B.

Ethylene-based polymers and processes for 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.

Ethylene-based polymers comprising the following properties: (A) a density less than 0.9190 g/cc; (B) a hexane extractable level that meets the following equation: hexane extractable level &#x2264;A+B [log(12)], where A=2.65 wt %, and B&#x2014;0.25 wt %[log (dg/min)]; based on total weight of the ethylene-based polymer; (C) a G' (at G&#x2033;=500 Pa, 1 70&#xb0; C.) that meets the following equation: G&#x2032;&#x2265;C+D [log(12)], where C=150 Pa, and D=&#x2212;60 Pa/[log(dg/min)]; and (D) a melt index (12) from 0.7 to 20 dg/min; are made in high pressure tubular process that comprises at least three reaction zones with the peak polymerization temperature of the first reaction zone &#x2265;320&#xb0; C. and the peak polymerization temperature of the last reaction zone &#x2264;290&#xb0; C.

Ethylene-based polymers with low hexane extractables and low densities

A process to form an ethylene-based polymer comprises polymerizing a reaction mixture comprising ethylene, at least one symmetrical polyene and at least one chain transfer agent system comprising at least one chain transfer agent (CTA) in the presence of at least one free-radical initiator and 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. The ratio of 'the activity of the CTA system of the feed to the first reaction zone' to the 'activity of the CTA system of the cumulative feed to the reaction zone i,' (Z/Z), is less than or equal to (0.8&#x2212;0.2*log(Cs)), wherein Cs is from 0.0001 to 10.

Process to make tubular ethylene based polymers with high G' and broad MWD

The invention provides a composition comprising an ethylene-based polymer, comprising at least the following: A) a unit derived from Carbon Monoxide (CO); and B) a unit derived from at least one Rheology Modifying Agent (RMA) selected from the following RMA1, RMA2, RMA3, RMA4, RMA5, each as described herein, or a combination thereof.

Ethylene-based polymers comprising units derived from carbon monoxide and a rheology modifying agent

Ethylene-based polymers comprising the following properties: (A) a density from 0.9190 g/cc to 0.9240 g/cc; (B) a hexane extractable level that is less than or equal to the lower of: (1) (A+(B*density (g/cc))+(C*log(MI) dg/min)) based on total weight of the ethylene-based polymer; where A=250.5 wt %, B=&#x2212;270 wt %/(g/cc), C=0.25 wt %/[log(dg/min)], or (2) 2.0 wt %; (C) a G' (at G&#x2033;=500 Pa, 170&#xb0; C.) that meets the following equation: G&#x2032;&#x2265;D+E[log (12)], where D=150 Pa and E=&#x2212;60 Pa/[log(dg/min)]; and (D) a melt index () from 1.0 to 20 dg/min; are made in process comprising the step of contacting in a reaction configuration, comprising a first tubular reaction zoneand a last tubular reaction zone i, in which i is greater than or equal to (&#x2265;) 3, under high pressure polymerization conditions, and in which the first reaction zonehas a peak polymerization temperature greater than the peak temperature of the ith reaction zone, and wherein the difference in these two peak temperatures is &#x2265;30&#xb0; C.

Process for producing ethylene-based polymers with low hexane extractables

A process to form an ethylene-based polymer comprises polymerizing a reaction mixture comprising ethylene, at least one monomeric chain transfer agent, and at least one chain transfer agent system comprising at least one chain transfer agent (CTA) in the presence of at least one free-radical initiator and in a reactor configuration comprising at least two reaction zones, reaction zone 1 and reaction zone i (i&#x2265;2), wherein the reaction zone i is downstream from reaction zone 1. The ratio of 'the activity of the CTA system of the feed to the first reaction zone' to the 'activity of the CTA system of the cumulative feed to the reaction zone i,' (Z/Z), is less than or equal to (0.8&#x2212;0.2*log(Cs)), wherein Cs is from 0.0001 to 10.

Process to make tubular ethylene based polymers with high melt strength

The invention provides a process to form an ethylene-based polymer, and said ethylene-based polymer, said process comprising polymerizing a reaction mixture comprising ethylene and at least the following A) and B): A) a Rheology Modifying Agent (RMA) selected from the following i) through v), as described herein; B) at least one comonomer selected from the following a) through c), as described herein.

Processes to prepare ethylene-based polymers with improved melt-strength

The invention provides an ethylene-based polymer formed from reacting at least the following: ethylene and at least one asymmetrical polyene, comprising an 'alpha, beta unsaturated end' and a 'C&#x2014;C double bond end,' and wherein the reaction takes place in the presence of at least one free-radical initiator.

Growing community of inventors

Freeport, TX, United States of America

John O Osby