Dow Global Technolgoies LLC

The Dow Chemical Company

Rohm and Haas Company

James L Cooper

Teresa Plumley Karjala

Brian W Walther

Carmelo Declet Perez

Otto J Berbee

Lori L Kardos

Malcolm F Finlayson

Hayley A Brown

John J Gathers

Nathan J Wiker

Jason C Brodil

Stephen M Oliver

Kenneth E Springs

Mehmet Demirors

Jian Jim Wang

Mridula Babli Kapur

Yijian Lin

David T Gillespie

John O Osby

Jeffrey D Weinhold

Stefan Hinrichs

Mai Chen

Thomas Oswald

Walter L Vaughn

Jose Ortega

John A Naumovitz

Nicole F Whiteman

Michael B Biscoglio

Michael W Potts

Jian Wang

José Ortega

Brian H Schumann

Thomas T Oswald

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

The present invention provides polymer blends that can be used in a multilayer structure and to multilayer structures including one or more layers formed from such blends. In one aspect, a polymer blend includes a copolymer including ethylene and at least one of acrylic acid and methacrylic acid having an acid content greater than 4 and up to 25 weight percent based on the weight of the copolymer and having a melt index (I.sub.2) of 1 to 60 g/10 minutes, wherein the total amount of ethylene acrylic acid copolymer and ethylene methacrylic acid copolymer includes 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/cm.sup.3 or more and having a melt index (I.sub.2) of 20 g/10 minutes or less, wherein the polyolefin includes 1 to 55 weight percent of the blend based on the total weight of the blend.

A composition comprising an ethylene/CO interpolymer, formed from a high pressure, free-radical polymerization, and wherein the ethylene/CO interpolymer has the following properties: a) a CO content from 'greater than 0' weight percent to less than, or equal to, 10 weight percent CO (carbon monoxide), based on the weight of the interpolymer; and b) a melting point, Tm, in &#xb0; C. that meets the following relationship: Tm (&#xb0; C.)&#x2264;601.4*(Density in g/cc)&#x2212;452.5(&#xb0; C.).

Ethylene/CO interpolymers and processes to make the same

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.

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

The invention provides a composition comprising at least the following: a) a first composition comprising at least one first ethylene-based polymer, formed by high pressure, free-radical polymerization, and wherein the first composition comprises the following properties: a melt index (I2) from 1.0 to 15.0 g/10 min, and density from 0.910 to 0.940 g/cc; b) a second composition comprising at least one second ethylene-based polymer, and wherein the second composition comprises the following properties; a melt index (I2) from 1.0 to 1000 g/10 min, a density greater than 0.940 g/cc; wherein the composition comprises the following properties: melt index (I2) from 2.0 to 20.0 g/10 min, and a density from 0.915 to 0.940 g/cc; and wherein the first composition is present in an amount from 65 to 95 wt %, based on the weight of the composition.

Ethylene-based polymer compositions for improved extrusion coatings

The invention provides a high pressure, free-radical polymerization process for polymerizing an ethylene-based polymer, said process comprising polymerizing ethylene, in a reactor configuration comprising a reactor with at least two reaction zones, a first reaction zone and a reaction zone located downstream from the first reaction zone; and wherein CO (carbon monoxide) is added to the reactor in at least one reaction zone located downstream from the first reaction zone, and wherein, less than, or equal to, 95 weight percent of the total amount of CO, is fed to the first reaction zone.

Processes to prepare ethylene-based polymers using a distribution of carbon monoxide

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.

Ethylene-based polymers and processes to make the same

The instant invention provides a polyolefin blend composition suitable for extrusion coating or extrusion lamination applications, and multilayer structure and articles made therefrom. The polyolefin blend composition suitable for extrusion coating or extrusion lamination applications according to the present invention comprises (a) a linear low density polyethylene composition comprising: less than or equal to 100 percent by weight of the units derived from ethylene; less than 35 percent by weight of units derived from one or more ?-olefin comonomers; wherein said polyethylene composition has a density in the range of 0.890 to 0.940 g/cm3, a molecular weight distribution (Mw/Mn) in the range of 2.5 to 4.5, a melt index (I2) in the range of 4 to 30 g/10 minutes, a molecular weight distribution (Mz/Mw) in the range of from 2.0 to 3, vinyl unsaturation of less than 0.1 vinyls per one thousand carbon atoms present in the backbone of said composition, and a zero shear viscosity ratio (ZSVR) in the range from 1 to 1.2; and (b) less than 50 percent by weight of a low density polyethylene composition having a density in the range of 0.915 to 0.930 g/cm3, a melt index (I2) in the range of 0.1 to 10 g/10 minutes, and a molecular weight distribution (Mw/Mn) in the range of 6 to 15.

Polyolefin blend composition

The instant invention provides a polyethylene blend composition having reduced chill roll buildup during extrusion process, and films and coating layers made therefrom. The polyethylene blend composition according to the present invention provide reduced chill roll buildups during extrusion process, and comprises: (a) from 60 to 95 percent by weight of a linear polyethylene composition comprising less than or equal to 100 percent by weight of the units derived from ethylene, and less than 15 percent by weight of units derived from one or more &#x3b1;-olefin comonomers; wherein said linear polyethylene composition has a density in the range of from 0.917 to 0.975 g/cm, a molecular weight distribution (M/M) in the range of from 1.70 to 3.62, a melt index (I) in the range of from 2 to 50 g/10 minutes, and a vinyl unsaturation in the range of from less than 0.06 vinyls per one thousand carbon atoms present in the linear polyethylene composition; and (b) from 5 to 40 percent by weight of a low density polyethylene composition (LDPE) having a density in the range of from 0.915 to 0.930 g/cm, and a melt index (I) in the range of from 0.4 to 10; wherein the polyethylene blend composition has a density in the range of 0.917 to 0.960 g/cmand a melt index (I) in the range of from 2 to 30 g/10 minutes.

Polyethylene blend composition having a reduced chill roll buildup during extrusion process

The instant invention provides a polyethylene blend composition having reduced chill roll buildup during extrusion process, and films and coating layers made therefrom. The polyethylene blend composition according to the present invention provide reduced chill roll buildups during extrusion process, and comprises: (a) from 60 to 95 percent by weight of a linear polyethylene composition comprising less than or equal to 100 percent by weight of the units derived from ethylene, and less than 15 percent by weight of units derived from one or more &#x3b1;-olefin comonomers; wherein said linear polyethylene composition has a density in the range of from 0.917 to 0.975 g/cm, a molecular weight distribution (M/M) in the range of from 1.70 to 3.62, a melt index (I2) in the range of from 2 to 50 g/10 minutes, and a vinyl unsaturation in the range of from less than 0.06 vinyls per one thousand carbon atoms present in the linear polyethylene composition; and (b) from 5 to 40 percent by weight of a low density polyethylene composition (LDPE) having a density in the range of from 0.915 to 0.930 g/cm, and a melt index (I) in the range of from 0.4 to 10; wherein the polyethylene blend composition has a density in the range of 0.917 to 0.960 g/cmand a melt index (I) in the range of from 2 to 30 g/10 minutes.

A composition is disclosed which is particularly suited for use in extrusion coating. The composition comprises a polymeric material having a rheology such that the slope S of a natural log-natural log plot of loss modulus (or G&#x2033;) versus storage modulus (or G') is greater than [0.635*(melt index)+13.2]/[(melt index)+16.6], and wherein the polymeric material has a CDF RI fraction less than 0.23 of a GPC chromatogram which has a molecular weight above 85,000 g/mol, and a CDF LS fraction of more than 0.07 at a conventional GPC molecular weight of 1,750,000 g/mol or greater. The compositions exhibit reduced neck-in when used in extrusion coating and the neck-in is independent of melt strength, thereby facilitating improved extrusion processes.

Resin compositions for extrusion coating

Fibrous product is externally sized by applying to the material a basic aqueous dispersion of an interpolymer of an ethylenically unsaturated monomer and an ethylenically unsaturated carboxylic acid comonomer. The preferred dispersions which have lower initial viscosities provide dispersion/starch dilute solutions with higher viscosities and improved external sizing effectiveness. Resulting fibrous products are adequately sized and exhibit excellent printability and strength properties.

Method for externally sizing fibrous materials

The present invention relates to film layers and compositions having improved hot tack properties. The compositions comprise polypropylene and linear ethylene polymer, substantially linear ethylene polymer or low density ethylene polymer. The compositions are suitable for use as, for example, laminates or films in packaging applications.

Polymer compositions which exhibit high hot tack

This invention relates to a pinhole-free, pinhole-resistant extrusion composition comprising at least one olefin polymer and to a method of making a pinhole-free, pinhole-resistant coated or laminated substrate. The invention uses either a single polymer composition or a polymer blend wherein the composition has a corrected or actual Goettfert melt strength value in the range of from about 0.01 to about 6.5 centiNetwons to provide a pinhole-free, pinhole-resistant extrusion coating, extrusion lamination, adhesive lamination or in-mold coating or the like. Suitable olefin polymers include high pressure, free-radical initiated ethylene polymers and homogeneously branched ethylene polymers with polymer blends of low density polyethylene and substantially linear ethylene polymers particularly preferred. The coatings, moldings, films or laminations are useful for various substrates including paperboard and can protect against product leakage in such applications as disposable cups for hot beverages.

Growing community of inventors

Brazoria, TX, United States of America

James L Cooper