Dow Global Technolgoies LLC

Jose Ortega

Teresa Plumley Karjala

Lori L Kardos

Wallace W Yau

Hayley A Brown

Bharat Indu Chaudhary

John O Osby

Kalyan Sehanobish

Sarat Munjal

David T Gillespie

Christopher R Eddy

Zachary L Polk

Alfred E Vigil, Jr

Jian Jim Wang

Brad A Cobler

Otto J Berbee

Stefan Hinrichs

James L Cooper

John A Naumovitz

Nilesh R Savargaonkar

Colleen M Tice

Chuan Yar Lai

John N Naumovitz

Jian Wang

Bharat Chaudhary

John Osby

Christopher Eddy

Hayley Brown

Wallace Yau

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

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

A composition comprising an ethylene-based polymer which comprises the following properties: a) MWD(conv) from 3.0 to 7.0; b) an ADF IR between 0.230 and 0.260 for molecular weight &#x2264;15,000 g/mol c) 12 from 4.0 to 6.5 g/10 min.

Ethylene-based polymers with good processability for use in multilayer films

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.

The invention provides a composition comprising an ethylene-based polymer, formed from a high pressure, free-radical polymerization, and wherein the ethylene-based polymer has the following properties: a) a CO content from 'greater than 0' to less than 10 weight percent CO (carbon monoxide), based on the weight of the polymer; and b) a melt index (I2) from 3 to 30 g/10 min.

An ethylene-based polymer, which is a low density polyethylene (LDPE), obtained by free radical polymerization of ethylene, and wherein the LDPE has a GPC parameter 'LSP' less than 1.60. An ethylene-based polymer that comprises the following features: An ethylene-based polymer that comprises the following features:

An ethylene-based polymer characterized as having a density from about 0.9 to about 0.94 grams per cubic centimeter, a molecular weight distribution (M/M) from about 8 to about 30, a melt index (I) from about 0.1 to about 50 grams per 10 minutes, a gpcBR value greater than 1.4 as determined by a gpcBR Branching Index and a Y value less than about 2 is disclosed. This ethylene-based polymer is especially useful for blending with other polymers such as LLDPE. When converting the blends into film, especially blown film, bubble stability and output is increased.

LDPE enabling high output and good optics when blended with other polymers

An ethylene-based polymer characterized as having a density from about 0.9 to about 0.94 grams per cubic centimeter, a molecular weight distribution (Mw/Mn) from about 4 to about 10, a melt index (I2) from about 0.05 to about 2 grams per 10 minutes, a gpcBR value greater than 0.05 as determined by a gpcBR Branching Index and a Y value greater than 0.4 is disclosed. This ethylene-based polymer is especially useful for blending with other polymers such as LLDPE. When converting the blends into film, especially shrink film, the film shows good optics, good shrink tension, high stiffness, high tensile modulus, and tensile strength. When this resin is blended at with a LLDPE on a blown film line, improvements are seen in haze, gloss, clarity, and MD and CD tear as compared to a comparative LDPE.

LDPE for use as a blend component in shrinkage film applications

The invention provides a composition comprising a low density polyethylene (LDPE) obtained by free radical polymerization of ethylene, and wherein the LDPE has a GPC-Viscometer parameter 'DPP' less than 1.3. The invention also provides a composition comprising an ethylene-based polymer that comprises the following features: a) at least 0.1 amyl groups per 1000 total carbon atoms; b) a melt index from 0.5 to 0.9 c) a MWD(conv) [(Mw(conv)/Mn(conv))] from 9 to 13. The invention also provides a composition comprising an ethylene-based polymer that comprises the following features: a) at least 0.1 amyl groups per 1000 total carbon atoms; b) a MWD(conv) from 9 to 13; c) a gpcBR value from 2.0 to 5.0; and d) a melt strength (MS) greater than 20 cN.

The invention provides an ethylene-based polymer comprising the following properties: A) a MWDconv from 7 to 10; and B) a 'normalized LSF' greater than, or equal to, 9.5.

Growing community of inventors

Lake Jackson, TX, United States of America

Jose Ortega