Abstract: A polypropylene comprising within a range from 0.1 wt % to 4 wt % ethylene and/or C4 to C12 ?-olefin derived units, one or more clarifiers, or both; wherein the polypropylene has a flexural modulus of at least 200 kpsi (0.05 in/min ASTM D790(A)) and an Mz/Mw of at least 4. The polypropylenes may be made by combining propylene and a comonomer with a Ziegler-Natta catalyst and at least two external electron donors, wherein the concentration of the electron donors is within a range from 1 to 100 ppm. The concentration of electron donors may be decreased to control the haze level of the polypropylene, and/or the level of comonomer derived units may be controlled to reduce the haze level of the polypropylene.

Abstract: A polypropylene comprising within a range from 0.1 wt % to 4 wt % ethylene and/or C4 to C12 ?-olefin derived units, one or more clarifiers, or both; wherein the polypropylene has a flexural modulus of at least 200 kpsi (0.05 in/min ASTM D790(A)) and an Mz/Mw of at least 4. The polypropylenes may be made by combining propylene and a comonomer with a Ziegler-Natta catalyst and at least two external electron donors, wherein the concentration of the electron donors is within a range from 1 to 100 ppm. The concentration of electron donors may be decreased to control the haze level of the polypropylene, and/or the level of comonomer derived units may be controlled to reduce the haze level of the polypropylene.

Abstract: A multi-layered sheet or profile comprising at least one layer of a high melt strength polypropylene and one layer of another polyolefin, the high melt strength polypropylene comprising at least 50 mol % propylene, and having a molecular weight distribution (MwDRI/MnDRI) greater than 6, a branching index (g?) of at least 0.97, and a melt strength greater than 20 cN determined using an extensional rheometer at 190° C. The sheets can be incorporated into thermoformed articles such as pallets, blow molded into hollow containers and drums, and the high melt strength polypropylene can be a layer making up a profile such articles as pipes, all of which are further described herein.

Abstract: Disclosed herein are molded articles, foamed articles, and foamable resins comprising a polypropylene resin comprising at least 50 mol % propylene, an MWD (Mw/Mn) of greater than 5, a branching index (g?) of at least 0.95, and a melt strength of at least 20 cN determined using an extensional rheometer at 190° C. Methods of making a molded article and making a foamed article are also disclosed.

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: Disclosed herein are molded articles, foamed articles, and foamable resins comprising a polypropylene resin comprising at least 50 mol % propylene, an MWD (Mw/Mn) of greater than 5, a branching index (g?) of at least 0.95, and a melt strength of at least 20 cN determined using an extensional rheometer at 190° C. Methods of making a molded article and making a foamed article are also disclosed.

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: Disclosed in one aspect is an anti-skid sheet comprising at least one contact layer selected from the group consisting of dynamically vulcanized alloys, propylene-?-olefin copolymers, and blends thereof; and at least one substrate layer comprising polyethylene having a density of from greater than 0.935 g/cm3. In one embodiment, the dynamically vulcanized alloy comprises a blend of one or more polyolefins and an at least partially vulcanized rubber. Disclosed in another aspect is a method of forming the anti-skid sheet comprising providing a melt-blending extruder for each of the sheet layers, at least one substrate layer as disclosed herein and at least one contact layer as disclosed herein, and co-extruding a melt of each component to form a co-extruded sheet. In a particular embodiment, the anti-skid sheet is thermoformed to form an article.

Abstract: Provided are TPV formulations having beneficial properties, such as scratch resistance, improved bondability, e.g., nylon bondability, and improved processability. Preferred TPVs provide lower density, lower cost, and good extrusion capabilities compared to conventional formulations. Sealing systems may be prepared with the TPVs described above. An exemplary automotive sealing system includes a sealant foot and a sealant lip.

Abstract: The present invention relates to a composition comprising more than 25 weight % (based on the weight of the composition) of one or more ethylene polymers having an Mw of 20,000 g/mole or more and at least 0.1 weight % of a liquid hydrocarbon modifier where the modifier has: 1) a viscosity index of 120 or more, and 2) an kinematic viscosity of 3 to 3000 cSt at 100° C., and 3) a pour point of ?10° C. or less, and 4) a flash point of 200° C. or more; and wherein the modifier contains less than 5 weight % of functional groups selected from hydroxide, aryls, substituted aryls, halogens, alkoxys, carboxylates, esters, acrylates, oxygen, nitrogen, and carboxyl, based upon the weight of the modifier.

Abstract: Regrind is mixed with at least one low density metallocene polyethylene to increase the amount of regrind that can be used in a thermoformed article.

Abstract: The present invention relates to single piece beverage bottle caps containing and/or made from polyethylene polymers, polymer blends, and/or resins. These polymers/blends/resins have a multimodal molecular weight distribution, sufficient physico-chemical characteristics, and superior environmental stress cracking resistance, so as to be ideally suited for articles and applications such as caps and closures.

Abstract: Disclosed in one aspect is an anti-skid sheet comprising at least one contact layer selected from the group consisting of dynamically vulcanized alloys, propylene-?-olefin copolymers, and blends thereof; and at least one substrate layer comprising polyethylene having a density of from greater than 0.935 g/cm3. In one embodiment, the dynamically vulcanized alloy comprises a blend of one or more polyolefins and an at least partially vulcanized rubber. Disclosed in another aspect is a method of forming the anti-skid sheet comprising providing a melt-blending extruder for each of the sheet layers, at least one substrate layer as disclosed herein and at least one contact layer as disclosed herein, and co-extruding a melt of each component to form a co-extruded sheet. In a particular embodiment, the anti-skid sheet is thermoformed to form an article.

Abstract: Processes are disclosed for oxygen-tailoring polyethylene blow molding resin. Polyethylene resin is conveyed through a feed zone, a melt-mixing zone and a melt zone, wherein the temperature of the polyethylene resin is from about 216° C. to about 260° C. in the melt zone. The resin is contacted with oxygen in an amount of at least about 20 parts by weight oxygen per million parts by weight resin. The oxygen-treated resin can be used to make polyethylene blow molded articles having improved melt strength, processability, and die swell.

Abstract: Regrind is mixed with at least one low density metallocene polyethylene to increase the amount of regrind that can be used in a thermoformed article.

Abstract: Regrind is mixed with at least one low density metallocene polyethylene to increase the amount of regrind that can be used in a thermoformed article.

Abstract: This invention relates to a method of making a pallet assembly comprising: (a) extruding (1) a first layer comprising a flame retardant polyethylene composition comprising a polyethylene having a density ranging from about 0.920 g/cc to about 0.970 g/cc and from about 0.15 wt % to about 40 wt % of a flame retardant material, wherein the wt % is based on the total weight of the first layer; and (2) a second layer comprising a polyolefin polymer composition comprising a polyolefin polymer and less than about 40 wt % of the flame retardant material, wherein the wt % is based on the total weight of the second layer and wherein the wt % of the flame retardant in the second layer is less than the wt % of the flame retardant in the first layer and (b) processing the first layer and the second layer to form the pallet assembly.

Abstract: The present invention relates to a composition comprising more than 25 weight % (based on the weight of the composition) of one or more ethylene polymers having an Mw of 20,000 g/mole or more and at least 0.1 weight % of a liquid hydrocarbon modifier where the modifier has: 1) a viscosity index of 120 or more, and 2) an kinematic viscosity of 3 to 3000 cSt at 100° C., and 3) a pour point of ?10° C. or less, and 4) a flash point of 200° C. or more; and wherein the modifier contains less than 5 weight % of functional groups selected from hydroxide, aryls, substituted aryls, halogens, alkoxys, carboxylates, esters, acrylates, oxygen, nitrogen, and carboxyl, based upon the weight of the modifier.

Abstract: Processes are disclosed for oxygen-tailoring polyethylene blow molding resin. Polyethylene resin is conveyed through a feed zone, a melt-mixing zone and a melt zone, wherein the temperature of the polyethylene resin is from about 216° C. to about 260° C. in the melt zone. The resin is contacted with oxygen in an amount of at least about 20 parts by weight oxygen per million parts by weight resin. The oxygen-treated resin can be used to make polyethylene blow molded articles having improved melt strength, processability, and die swell.

Abstract: The color or whiteness of polyolefin resins is significantly improved by the addition of low levels of optical brighteners. These brighteners can be used with standard additive packages comprising primary and/or secondary antioxidants such as phenolics and phosphites.