Abstract: Methods of preparing a polymerization catalyst component is provided, in which a magnesium component, a Lewis acid solubilizing component, a titanium compound, optionally a transition metal compound different than the titanium compound, and typically an inert filler are combined in a slurrying agent and spray-dried to produce a catalyst precursor in the form of a substantially spherical and porous solid particle. The methods and catalysts of this disclosure can provide ethylene homopolymer and copolymer resins having a high molecular weight tail and a broadened molecular weight distribution as compared to more traditional Ziegler-Natta catalysts.

Abstract: A polyethylene composition comprising a granular polyethylene resin characterized by a resin solid density of from 0.91 to 0.97 g/cm3, a ratio of intraparticle void volume to interparticle void volume of from 0.33 to 0.67, and a total resin porosity, ?total, of equal to or greater than 0.45 is provided.

Abstract: A process for polymerizing ethylene to produce an ethylene-based polymer including contacting ethylene with a Ziegler-Natta procatalyst, an alkylaluminum cocatalyst and a self limiting agent selected from the group of aliphatic, cycloaliphatic, substituted cycloaliphatic or aromatic esters, anhydrides and amides such that the self limiting agent reduces polymerization rates to no greater than 40% of the polymerization rate in the absence of the self limiting agent at temperatures equal to or greater than 120° C. is provided.

Abstract: A process for making a Ziegler-Natta-type catalyst precursor including contacting a Group 4 metal compound with one or more Titanium compounds selected from the group of TiCl3 (Al-activated or hydrogen-reduced), and Ti(OR)4 where R is ethyl, isopropyl or butyl in the presence of an alcohol solution having at least one C2-C4 alcohol and at least one of MgCl2 and magnesium compounds which form MgCl2 in the presence of the alcohol solution to form a catalyst precursor solution is provided. Also provided are catalysts made from the precursors produced by the process. Also provided are polymers made using the catalysts.

Abstract: A polymerization process including the use of a first Ziegler-Natta type procatalyst having no internal electron donor and a second Ziegler-Natta type procatalyst including an internal electron donor is provided.

Abstract: A virgin granular polymer comprising polymer particles wherein at least 90% by weight of the granular polymer particles, have an I21 that is within two standard deviations of a mean I21 of the granular polymer, the ratio of the standard deviation of I21 to the mean of the granular polymer is less than 0.2 and the ratio of the standard error of a linear fit to the mean of the granular polymer is less than 0.1, and further wherein the virgin granular polymer has an I21 less than or equal to 70 and/or further wherein at least 90% by weight of the granular polymer particles, have a density that is within two standard deviations of a mean density of the granular polymer, the ratio of the standard deviation of the mean density of the granular polymer to the mean density of the granular polymer is less than 0.002 and the ratio of the standard error of a linear fit to the mean of the density is less than 0.001, and further wherein the virgin granular polymer has an I21 less than or equal to 70 is provided.

Abstract: A process for producing an olefin-based polymer in a polymerization reactor including a fluidized bed, a disengaging section and a neck connecting the bed and disengaging section, at least one monomer, in the gas phase, in the presence of at least one catalyst containing at least two transition metals, one of the at least two transition metals being Ti, at least one cocatalyst, a composition having at least one compound selected from formula (I), and/or at least one compound selected from formula (II): (R1CO2)2AlOH (I), (R2)xN(R3OH)y (II); wherein R1 is a hydrocarbon radical containing from 13 to 25 carbons; R2 is a hydrocarbon radical containing from 14 to 26 carbons; R3 is a hydrocarbon radical containing from 1 to 4 carbons; and x+y=3, and x has a value of 1 or 2; and wherein the reactor is operated in a condensed mode and the average height of the fluidized bed is maintained above the neck of the polymerization reactor is provided. The reaction product of the process is also provided.

Abstract: A process for polymerizing ethylene to produce an ethylene-based polymer including contacting ethylene with a Ziegler-Natta procatalyst, an alkylaluminum cocatalyst and a self limiting agent selected from the group of aliphatic, cycloaliphatic, substituted cycloaliphatic or aromatic esters, anhydrides and amides such that the self limiting agent reduces polymerization rates to no greater than 40% of the polymerization rate in the absence of the self limiting agent at temperatures equal to or greater than 120° C. is provided.

Abstract: The present invention relates to a process of producing an ethylene polymer composition in multiple stages, of which the first stage is preferably a slurry polymerization stage, in the presence of a catalyst system, comprising: a) a solid catalyst precursor, comprising a transition metal selected from titanium and vanadium; magnesium; a halide, optionally an electron donor; and a solid particulate material comprising an inorganic oxide, and wherein the median particle diameter, D50, of the solid catalyst precursor, based upon the total volume of solid catalyst precursor, is from 1 to 13 micrometers; and b) an organoaluminium compound.

Abstract: A Ziegler-Natta procatalyst composition in the form of solid particles and comprising magnesium, halide and transition metal moieties, said particles having an average size (D50) of from 10 to 70 ?m, characterized in that at least 5 percent of the particles have internal void volume substantially or fully enclosed by a monolithic surface layer (shell), said layer being characterized by an average shell thickness/particle size ratio (Thickness Ratio) determined by SEM techniques for particles having particle size greater than 30 ?m of greater than 0.2.

Abstract: The present invention relates to a process of producing an ethylene polymer composition in multiple stages of which the first stage is a slurry polymerization stage, in the presence of a catalyst system comprising a) a solid catalyst precursor comprising a transition metal selected from titanium and vanadium; magnesium, a halide, optionally an electron donor, and a solid particulate material comprising an inorganic oxide, wherein the median particle diameter of the solid catalyst precursor based upon the total volume of solid catalyst precursor, D50, is from 1 to 13 micrometers; and b) an organoaluminium compound.

Abstract: A Ziegler-Natta procatalyst composition in the form of solid particles and comprising magnesium, halide and transition metal moieties, said particles having an average size (D50) of from 10 to 70 ?m, characterized in that at least 5 percent of the particles have internal void volume substantially or fully enclosed by a monolithic surface layer (shell), said layer being characterized by an average shell thickness/particle size ratio (Thickness Ratio) determined by SEM techniques for particles having particle size greater than 30 ?m of greater than 0.2.

Abstract: A method for making a support impregnated Ziegler-Natta-type catalyst precursor including at least two transition metals and a support material wherein the resulting catalyst precursor is free-flowing is provided. Also provided is a process for producing a Ziegler-Natta type procatalyst by halogenating the free flowing catalyst precursor. The Ziegler-Natta type procatalyst and the reaction product of at least one monomer in the presence of the Ziegler-Natta type procatalyst and cocatalyst are also provided.

Abstract: The invention provides an ethylene-based interpolymer comprising the following features: a) density from 0.910 to 0.930 g/cc; b) melt index (I2) from 0.1 to 0.5 g/10 min; and c) a high density fraction in an ATREF short chain branch distribution (SCBD) curve, eluting above 92° C., of greater than 10 percent to less than 28 percent of the total ATREF SCBD curve area. The invention also provides a composition comprising an ethylene-based interpolymer that comprises the following features: a) a density from 0.919 to 0.928 g/cc; b) a melt index (I2) from 0.1 to 0.8 g/10 min; and c) a high density fraction in an ATREF short chain branch distribution (SCBD) curve, eluting above 92° C., of greater than 10 percent to less than 28 percent of the total ATREF SCBD curve area. The invention also provides a hollow tube comprising at least one component formed from a composition comprising an ethylene-based interpolymer that comprises the following features: a) a density from 0.919 to 0.

Abstract: A process for making a Ziegler-Natta-type catalyst precursor including contacting a Group 4 metal compound with one or more Titanium compounds selected from the group of TiCl3 (Al-activated or hydrogen-reduced), and Ti(OR)4 where R is ethyl, isopropyl or butyl in the presence of an alcohol solution having at least one C2-C4 alcohol and at least one of MgCl2 and magnesium compounds which form MgCl2 in the presence of the alcohol solution to form a catalyst precursor solution is provided. Also provided are catalysts made from the precursors produced by the process. Also provided are polymers made using the catalysts.

Abstract: A Ziegler-Natta procatalyst composition in the form of solid particles and comprising magnesium, halide and transition metal moieties, said particles having an average size (D50) of from 10 to 70 ?m, characterized in that at least 5 percent of the particles have internal void volume substantially or fully enclosed by a monolithic surface layer (shell), said layer being characterized by an average shell thickness/particle size ratio (Thickness Ratio) determined by SEM techniques for particles having particle size greater than 30 ?m of greater than 0.2.

Abstract: Methods of preparing a polymerization catalyst component is provided, in which a magnesium component, a Lewis acid solubilizing component, a titanium compound, optionally a transition metal compound different than the titanium compound, and typically an inert filler are combined in a slurrying agent and spray-dried to produce a catalyst precursor in the form of a substantially spherical and porous solid particle. The methods and catalysts of this disclosure can provide ethylene homopolymer and copolymer resins having a high molecular weight tail and a broadened molecular weight distribution as compared to more traditional Ziegler-Natta catalysts.

Abstract: The invention provides a composition comprising a blend, which comprises a high molecular weight ethylene-based polymer, and a low molecular weight ethylene-based polymer, and wherein the high molecular weight ethylene-based polymer has a density less than, or equal to, 0.955 g/cm3, and wherein the blend has a high load melt index (I21) greater than, or equal to, 15 g/10 min, and wherein the blend has a molecular weight distribution (Mw/Mn) greater than, or equal to, 15. The invention also provides a composition comprising a blend, which comprises a high molecular weight ethylene-based polymer and a low molecular weight ethylene-based polymer, and wherein the high molecular weight ethylene-based polymer component has a density less than, or equal to, 0.945 g/cm3, and a melt index (I2) less than, or equal to, 0.

Abstract: A gas phase polymerization process for producing a polyethylene polymer including polymerizing ethylene and optionally at least one ?-olefin comonomer in a fluidized bed reactor under condensed mode operating conditions using a Cr+6-based supported catalyst and a catalyst initiation enhancing agent is provided. The catalyst initiation enhancing agent is an aluminum alkyl solution that is present in the fluidized bed reactor at effective Al/Cr ratios between 0.2 to 1.5. A catalyst initiation enhancing system including at least one aluminum alkyl and at least one hydrocarbon solvent wherein the aluminum alkyl is present in the solvent at concentrations of less than about 0.03 molar.

Abstract: A process for producing an olefin-based polymer, said process comprising polymerizing at least one monomer, in the gas phase, or in a slurry process, in the presence of at least the following components: A) at least one catalyst; B) at least one cocatalyst; C) a composition comprising at least one compound selected from formula (I), and/or at least one compound selected from formula (II): (R1CO2)2AlOH ??(I), (R2)xN(R3OH)y ??(II); wherein R1 is a hydrocarbon radical containing from 13 to 25 carbons; R2 is a hydrocarbon radical containing from 14 to 26 carbons; R3 is a hydrocarbon radical containing from 1 to 4 carbons; and x+y=3, and x has a value of 1 or 2.