Patent application number | Description | Published |
20100203277 | ETHYLENE-BASED POLYMERS, METHODS OF MAKING THE SAME AND ARTICLES PREPARED THEREFROM - The invention provides an ethylene-based interpolymer comprising the following features:
| 08-12-2010 |
20100292418 | PROCESS FOR POLYMERIZING OLEFIN-BASED POLYMERS - 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:
| 11-18-2010 |
20110009577 | ENHANCED CONDENSED MODE OPERATION IN METHOD OF PRODUCING POLYOFEFINS WITH CHROMIUM BASED CATALYSTS - A gas phase polymerization process for producing a polyethylene polymer including polymerizing ethylene and optionally at least one α-olefin comonomer in a fluidized bed reactor under condensed mode operating conditions using a Cr | 01-13-2011 |
20110034635 | ETHYLENE-BASED POLYMER COMPOSITIONS, METHODS OF MAKING THE SAME, AND ARTICLES PREPARED FROM THE SAME - 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/cm | 02-10-2011 |
20110130271 | ZIEGLER-NATTA CATALYST COMPOSITIONS FOR PRODUCING POLYETHYLENES WITH A HIGH MOLECULAR WEIGHT TAIL AND METHODS OF MAKING THE SAME - 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. | 06-02-2011 |
20110166305 | Robust Spray-Dried Ziegler-Natta Procatalyst and Polymerization Process Employing Same - 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 μm, 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 μm of greater than 0.2. | 07-07-2011 |
20110251361 | METHOD OF MAKING ZIEGLER-NATTA TYPE CATALYSTS - 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 TiCl | 10-13-2011 |
20120178888 | ROBUST SPRAY-DRIED ZIEGLER-NATTA PROCATALYST AND POLYMERIZATION PROCESS EMPLOYING SAME - 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 μm, 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 μm of greater than 0.2. | 07-12-2012 |
20120214956 | MULTISTAGE PROCESS FOR PRODUCING ETHYLENE POLYMER COMPOSITIONS - 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, D | 08-23-2012 |
20130131289 | SELF LIMITING CATALYST COMPOSITION FOR ETHYLENE POLYMERIZATION - 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. | 05-23-2013 |
20130324681 | Polymers, Method of Producing the Same, and Articles Made Therefrom - A virgin granular polymer comprising polymer particles wherein at least 90% by weight of the granular polymer particles, have an I | 12-05-2013 |
20130338320 | Control of Resin Molecular Weight Distribution Using Mixed Catalyst Systems - 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. | 12-19-2013 |