Abstract: Provided herein are polymer compositions comprising a polymer and polymer processing aid (PPA) comprising a blend of at least two of: (i) a polyethylene glycol; (ii) a surfactant comprising a sorbitan ester or a polysorbate; and (iii) a metal salt of a fatty acid. The polymer can be a C2-C6 olefin homopolymer or a copolymer of two or more C2-C20 ?-olefins, and the polymer composition can take the form of polymer pellets; a polymer melt; reactor-grade polymer granules and/or polymer slurries; or other form of polymer composition containing the PPA and optionally one or more other additives. The polymer composition is preferably free or substantially free of fluorine, including fluoropolymer-based PPAs.

Abstract: Provided herein are polymer compositions and methods of making them, including blending a polymer and a polyethylene glycol (PEG) masterbatch. The PEG masterbatch can include one or more PEGs each having molecular weight less than 40,000 g/mol. The polymer can be a C2-C6 olefin homopolymer or a copolymer of two or more C2-C20 ?-olefins. The PEG masterbatch and resulting polymer composition is preferably free or substantially free of fluorine, including fluoropolymer-based PPAs.

Abstract: Provided herein are polymer compositions comprising a polymer and polyethylene glycol (PEG)-based polymer processing aid (PPA). The polyethylene glycol can have molecular weight less than 40,000 g/mol. The polymer can be a C2-C6 olefin homopolymer or a copolymer of two or more C2-C20 ?-olefins, and the polymer composition can take the form of polymer pellets; a polymer melt; reactor-grade polymer granules and/or polymer slurries; or other form of polymer composition containing the PPA and optionally one or more other additives. The polymer composition is preferably free or substantially free of fluorine, including fluoropolymer-based PPAs.

Abstract: Provided herein are polymer compositions and methods of making them, including blending a polymer and a polyethylene glycol (PEG) masterbatch. The PEG masterbatch can include one or more PEGs each having molecular weight less than 40,000 g/mol. The polymer can be a C2-C6 olefin homopolymer or a copolymer of two or more C2-C20 ?-olefins. The PEG masterbatch and resulting polymer composition is preferably free or substantially free of fluorine, including fluoropolymer-based PPAs.

Abstract: Disclosed are multilayer films which can provide balanced improvement in film mechanical performance, where the film comprises a propylene-based polymer and an elastic ethylene copolymer.

Abstract: Disclosed are multilayer films with high toughness performance, where the films have an elastic ethylene copolymer in the core layer.

Abstract: The present invention is directed to polyethylene films having improved properties. Particularly, relatively thick films having improved tear properties and methods of improving tear, and multilayer films having improved dart impact strength and methods of improving the Dart impact strength.

Abstract: Disclosed are multilayer films which can provide balanced improvement in film mechanical performance, where the film comprises a propylene-based polymer and an elastic ethylene copolymer.

Abstract: Disclosed are multilayer films with high toughness performance, where the films have an elastic ethylene copolymer in the core layer.

Abstract: Provided herein is a polymer comprising from about 65 wt % to about 90 wt % based on the total weight of the blend of an ethylene ?-olefin elastomer having either no crystallinity or crystallinity derived from ethylene, having greater than about 75 wt % units derived from ethylene; and from about 10 wt % to about 35 wt % based on the total weight of the blend of a propylene polymer having about 40 wt % or more units derived from propylene, including isotactically arranged propylene derived sequences; wherein the ethylene ?-olefin elastomer and the propylene polymer are prepared in separate reactors arranged in parallel configuration.

Abstract: Provided herein is a polymer comprising greater than or equal to about 70 wt % units derived from ethylene, less than or equal to about 30 wt % units derived from propylene, and less than about 5 wt % of units derived from C4-C20 alpha-olefins, and having the following properties: crystallinity derived from ethylene; a heat of fusion of about 20 to about 85 J/g; a polydispersity index (Mw/Mn) of less than about 2.5; a reactivity ratio of about 0.5 to about 1.5; a proportion of inversely inserted propylene units based on 2, 1 insertion of propylene monomer in all propylene insertions, as measured by 13C NMR of less than 0.5 wt %; and a branching index greater than about 0.

Abstract: Provided herein is a polymer comprising greater than or equal to about 70 wt % units derived from ethylene, less than or equal to about 30 wt % units derived from propylene, and less than about 5 wt % of units derived from C4-C20 alpha-olefins, and having the following properties: crystallinity derived from ethylene; a heat of fusion of about 20 to about 85 J/g; a polydispersity index (Mw/Mn) of less than about 2.5; a reactivity ratio of about 0.5 to about 1.5; a proportion of inversely inserted propylene units based on 2, 1 insertion of propylene monomer in all propylene insertions, as measured by 13C NMR of less than 0.5 wt %; and a branching index greater than about 0.

Abstract: Processes are disclosed for oxygen-tailoring polyethylene, particularly polyethylenes suitable for wire and cable applications. One process includes conveying a first polyethylene having a melt index ?5.0 and an MWD ?5.0 through mixing or extrusion apparatus having a feed zone, a melt-mixing zone downstream of the feed zone, and a melt zone downstream of the melt-mixing zone, wherein the temperature of the first polyethylene in the melt zone ranges from about 180° C. to about 300° C.; and contacting the first polyethylene with an amount of an oxygen-containing gas having at least about 20.0 parts by weight oxygen per million per parts by weight of the first polyethylene (ppm (wt) O2). Polyethylene compositions having improved properties, particularly for wire and cable applications are disclosed.

Abstract: The present invention is directed to polyethylene films having improved properties. Particularly, relatively thick films having improved tear properties and methods of improving tear, and multilayer films having improved dart impact strength and methods of improving the Dart impact strength.

Abstract: This invention relates to photovoltaic modules wherein a polyethylene composition is used as an alternative, in whole or in part, to traditional ethylene vinyl acetate (EVA) resins in at least one layer. The polyethylene compositions are especially useful in the encapsulant and/or backsheet layers of photovoltaic modules. The polyethylene compositions comprise units derived from at least one C4 to C6 alpha-olefin comonomer, and have densities of 0.86 g/cm3 to 0.91 g/cm3.

Abstract: Processes are disclosed for oxygen-tailoring polyethylene, particularly polyethylenes suitable for wire and cable applications. One process includes conveying a first polyethylene having a melt index ?5.0 and an MWD ?5.0 through mixing or extrusion apparatus having a feed zone, a melt-mixing zone downstream of the feed zone, and a melt zone downstream of the melt-mixing zone, wherein the temperature of the first polyethylene in the melt zone ranges from about 180° C. to about 300° C.; and contacting the first polyethylene with an amount of an oxygen-containing gas having at least about 20.0 parts by weight oxygen per million per parts by weight of the first polyethylene (ppm (wt) O2). Polyethylene compositions having improved properties, particularly for wire and cable applications are disclosed.

Abstract: Provided are ethylene-based polymer compositions, articles made therefrom, and methods of making the same. Ethylene-based polymer compositions include blends of a linear low density polyethylene prepared with metallocene catalyst and a low density polyethylene. The linear low density polyethylene may optionally have about five mole percent or less of monomer units derived from an alpha-olefin comonomer. Articles composed of such ethylene-based polymer compositions, such as blown films, exhibit favorable physical properties, including excellent optical properties and retained strength i.e., mitigation of expected decline in physical strength due to LDPE addition.

Abstract: A high clarity, high throughput film comprising at least two skin layers and at least one core layer there between, wherein the skin layers comprise at least one linear ethylene-?-olefin copolymer having an I21/I2 of greater than 20; a density within the range from 0.910 to 0.945 g/cm3 and CDBI of less than 40; and the core layer comprises at least one polyethylene having an overall density of at least 0.910 g/cm3; wherein the film has a dart impact (ASTM D1709) of greater than 10 g/?m and a Haze (ASTM D1003 method B) of less than 10%.

Abstract: Provided are thermoplastic elastomer compositions composed of a thermoplastic component, an elastomeric component, and at least one particulate composition. Particulate compositions are composed of a particulate material and a carrier medium. Exemplary particulate materials include minerals, mineral compounds, including mineral oxides, clays, carbon, nanotubes, and combinations thereof. Typical carrier mediums are one or more polar polymers, apolar polymers, one or more oils, poly ?-olefins, or combinations thereof. The at least one particulate composition is dispersed within the thermoplastic component and/or the elastomeric component. Particulate compositions include clay grease compositions wherein a clay, e.g., an exfoliated clay, is utilized as a thickener.

Abstract: Processes for producing high pressure polyethylene and processes for increasing the crosslinkability of high pressure polyethylene are disclosed. The processes comprise controlling particular reaction parameters that have been found to promote crosslinkability in the resulting high pressure polyethylene. High pressure polyethylenes having improved crosslinkability are also disclosed.