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| Number | Title | Issue Date |
| 8338324 | Activating supports based on phosphonium complexes The present invention relates to the covalent anchorage of non-coordinating anions on mineral supports to prepare activating supports for the polymerisation of ethylene and alpha-olefins and wherein the activating species is provided by a phosphonium-borate or phosp... | 12/25/2012 |
| 7566677 | De-foaming spray dried catalyst slurries A method for preparing a spray dried catalyst and a low viscosity, low foam spray dried catalyst system for olefin polymerization are provided. In one aspect, the method includes preparing a catalyst system including one or more components selected from metallocenes... | 07/28/2009 |
| 7442667 | Preparation of supported cocatalysts The present invention relates to a process for preparing a supported cocatalyst for olefin polymerization, which comprises reacting A) a support bearing functional groups, B) triethylaluminum and C) a compound of the formula (I), (R | 10/28/2008 |
| 7439378 | Fulvene, metallocene catalysts and preparation method thereof, and preparation of polyolefines copolymer using the same The present invention relates to a novel fulvene compound and a preparation method thereof, and more particularly to a fulvene compound having substituted groups in the 2- and 5-positions, prepared from an unsaturated ketone having a substituted group in the β-posi... | 10/21/2008 |
| 7435370 | Process of making a fiber A fiber and a process for obtaining same from a high-modulus polyethylene, extrudable in state-of-the-art equipment and in the absence of previous solubilization in any kind of organic solvent is described, the process comprising providing such a polyethylene, intro... | 10/14/2008 |
| 7414005 | Preparation of catalyst compositions having improved activity The present invention relates to a process for preparing a catalyst composition for olefin polymerization, which comprises preparing a catalyst solid in a first step by bringing A) at least one support, B) at least one organic compound having at least one functional... | 08/19/2008 |
| 7414099 | Hindered polyalicyclic alkyl catalysts and their use in a gas-phase polymerization reactor Embodiments of the present invention include a method of polymerizing olefins comprising contacting olefins with a catalyst composition made by the process of combining a hindered polyalicyclic alkyl catalyst precursor with a particulate inorganic oxide for a deposi... | 08/19/2008 |
| 7405176 | Solid main catalyst component for ethylene polymerization, a process for preparing the same and a catalyst containing the same The present invention provides a high-activity solid main catalyst component for ethylene polymerization, a process for preparing the same and a catalyst containing the same. The main catalyst component consists essentially of a magnesium compound, a titanium compou... | 07/29/2008 |
| 7402638 | Propylene polymer particle method of producing the same and use thereof The present invention relates to a propylene random copolymer which satisfies the following requirements [1] to [4], and to various useful molded products obtained by molding the propylene random copolymer: [1] the concentration (P... | 07/22/2008 |
| 7399895 | Aluminum phosphate-supported group 6 metal amide catalysts for oligomerization of ethylene A catalyst composition for the preparation of oligomeric and/or polymer derivatives of olefin monomers, said composition comprising a Group 6 metal amide complex, a Group 1, 2, 12, 13, or 14 metal hydrocarbyl composition or compound, and a solid support comprising a... | 07/15/2008 |
| 7385015 | Trialkylaluminum treated supports This invention relates to a process to prepare a trialkylaluminum treated support comprising: 1) combining a support with first trialkylaluminum compound(s), where the alkyl groups have at least 2 carbon atoms; then 2) calcining the combination of the support and th... | 06/10/2008 |
| 7371806 | Process for the preparation of ethylene copolymers Process for the preparation of ethylene copolymers comprising the copolymerization of ethylene with olefins CH2═CHR, in which R is a hydrocarbyl radical with 1-12 carbon atoms carried out in the presence of a catalyst comprising (i) a solid catalyst com... | 05/13/2008 |
| 7368411 | Supported metallocene catalysts and their use in producing stereospecific polymers Supported stereospecific catalysts and processes for the stereotactic propagation of a polymer chain derived from ethylenically unsaturated monomers which contain three or more carbon atoms or which are substituted vinyl compounds, specifically alpha olefins, partic... | 05/06/2008 |
| 7345119 | Olefin polymerization catalyst and olefin polymerization method using the same An olefin polymerization solid catalyst including a reaction product of a transition metal compound and an organoaluminum compound carried on a support having silica treated with an organoaluminum-oxy compound. ... | 03/18/2008 |
| 7332455 | Catalyst component and catalyst for olefin polymerization as well as use thereof The present invention relates to a catalyst component and a catalyst for olefin polymerization. The catalyst component utilizes magnesium halide and silica as composite support, and the particle morphology thereof can be improved by regulating the ratio of magnesium... | 02/19/2008 |
| 7326757 | Supported catalyst for olefin polymerization Disclosed are catalyst systems and methods of making the catalyst systems for the polymerization of an olefin containing a solid titanium catalyst component containing an inorganic titanium compound, a magnesium alcohol adduct made from an inorganic magnesium compou... | 02/05/2008 |
| 7323526 | Supported metallocene-alkyl catalyst composition A supported catalyst composition having improved flow properties is disclosed comprising an alkylalumoxane, a metallocene-alkyl an inorganic oxide support having an average particle size of from 0.1 to 50 μm and calcined at a temperature greater than 600° C., and ... | 01/29/2008 |
| 7309677 | Supported polymerisation catalysts A method for the preparation of a supported transition metal catalyst system which includes the steps of: (i) mixing together in a suitable solvent (a) an aluminoxane and (b) an ionic activator containing a cation and an anion, wherein the anion has at least one sub... | 12/18/2007 |
| 7300988 | Single catalyst low, medium and high density polyethylenes A method of polymerizing olefins comprising combining in one embodiment ethylene and optionally one or more α-olefins with a catalyst composition in a continuous polymerization reactor at a pressure of less than 10,000 kPa; wherein the catalyst composition comprise... | 11/27/2007 |
| 7300902 | Catalyst for polymerization of ethylene, preparation thereof and use of the same The present invention provides an ethylene polymerization catalyst. The present invention also provides a process for preparing the ethylene polymerization catalyst, comprising reacting powdered magnesium with an alkyl halide of formula RX in the presence of an ethe... | 11/27/2007 |
| 7294600 | Supported hybrid metallocene catalyst, method for preparing the same, and method for preparing polyolefin using the same The present invention relates to a supported metallocene catalyst used for preparing polyolefin whose physical properties and molecular weight distribution can be easily controlled, a method for preparing the same, and a method for preparing polyolefin using the sam... | 11/13/2007 |
| 7294599 | Acidic activator-supports and catalysts for olefin polymerization This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, typically using a supported catalyst composition. In one aspect, this invention encompasses precontacting a metall... | 11/13/2007 |
| 7268195 | Mesoporous catalyst support, a catalyst system, and method of making and using same for olefin polymerization This invention relates to a catalyst system comprising a catalyst and a support comprising a non-layered inorganic porous crystalline phase material, wherein the support comprises a hexagonal arrangement of uniformly-sized pores having an average pore diameter great... | 09/11/2007 |
| 7247686 | Solid cocatalyst component for olefin polymerization and catalyst system thereof A solid cocatalyst for olefin polymerization in which an ion-containing compound comprising a cation expressed by [R4M]+, wherein the group R are each individually selected from the group consisting of hydrogen atom and a substituted or non-substituted hy... | 07/24/2007 |
| 7232869 | Catalyst composition for olefin polymerization A process for the preparation of a catalyst system includes the steps of combining a Lewis base, an organic compound having at least one functional group containing active hydrogen, and an organometallic component with a particulate support material to provide an in... | 06/19/2007 |
| 7223825 | Single catalyst low, medium and high density polyethylenes A method of polymerizing olefins comprising combining in one embodiment ethylene and optionally one or more α-olefins with a catalyst composition in a continuous polymerization reactor at a pressure of less than 10,000 kPa; wherein the catalyst composition comprise... | 05/29/2007 |
| 7220695 | Supported activator This invention relates to supported activators comprising the product of the combination of an ion-exchange layered silicate, an organoaluminum compound, and a heterocyclic compound, which may be substituted or unsubstituted. This invention further relates to cataly... | 05/22/2007 |
| 7211536 | Supported metallocene catalysts and their use in producing stereospecific polymers Supported stereospecific catalysts and processes for the stereotactic propagation of a polymer chain derived from ethylenically unsaturated monomers which contain three or more carbon atoms or which are substituted vinyl compounds, specifically alpha olefins, partic... | 05/01/2007 |
| 7211535 | Enhanced polyolefin catalyst The present invention provides a novel process for preparing a catalyst useful in gas phase polymerization of olefins wherein the physical properties of the polymer and the productivity of the catalyst can be altered depending on the sequence of addition of the cata... | 05/01/2007 |
| 7202373 | Monocyclopentadienyl complexes Monocyclopentadienyl complexes in which the cyclopentadienyl system bears at least one uncharged donor bound via a boron-containing bridge and comprising one or more atoms of group 15 and/or 16 of the Periodic Table of the Elements and is bound to a metal selected f... | 04/10/2007 |
| 7202190 | Supported catalyst system for the polymerization of olefins A supported catalyst system for polymerizing olefins comprising a) a support, b) a Lewis base of the formula M3R6R7R8 (I) wherein M3 is an element... | 04/10/2007 |
| 7199073 | Resins that yield low haze films and the process for their production Catalyst compositions comprising a first metallocene compound, a second metallocene compound, a third metallocene compound, a chemically-treated solid oxide, and an organoaluminum compound are provided. Methods for preparing and using the catalyst and polyolefins ar... | 04/03/2007 |
| 7199195 | Polyethylene resins The invention provides ethylene/α-olefin copolymers exhibiting improved environmental stress cracking resistance properties, and methods for the production of the copolymers in a single reactor by means of a bimetallic catalyst including a Ziegler component and a m... | 04/03/2007 |
| 7189675 | Olefin polymerization catalyst on plasma-contacted support A method for preparing an olefin polymerization catalyst is disclosed. An inorganic oxide is contacted with plasma and a transition metal compound is supported on the contacted inorganic oxide. The method is fast, convenient, and avoids many of the problems associat... | 03/13/2007 |
| 7172987 | Bimetallic catalyst, method of polymerization and bimodal polyolefins therefrom Bimetallic catalysts, and methods of producing a bimetallic catalyst comprising a modified Ziegler-Natta catalyst and a metallocene are provided, in one embodiment the method including combining: (a) a Ziegler-Natta catalyst comprising a Group 4, 5 or 6 metal halide... | 02/06/2007 |
| 7172988 | Catalyst component for ethylene polymerization, a process for preparing thereof and catalyst comprising the same A catalyst component for ethylene polymerization, including an inorganic oxide support, and at least one alkyl metal compound, at least one halide, at least one dihydrocarbyl magnesium compound, at least one difunctional compound that reacts with the dihydrocarbyl m... | 02/06/2007 |
| 7169864 | Metallocene catalysts, their synthesis and their use for the polymerization of olefins A process for the preparation of a catalyst system includes the steps of combining a support material with a first composition which includes at least one aluminoxane in a first solvent to provide an aluminoxane loaded support; and, contacting the aluminoxane loaded... | 01/30/2007 |
| 7157398 | Covalently fixed nonmetallocenes, process for preparing them and their use for the polymerization of olefins The invention relates to a method for producing special transition metal compounds, to novel transition metal compounds and to the use thereof for polymerizing olefins. ... | 01/02/2007 |
| 7153804 | Catalyst component for ethylene polymerization, the preparation thereof and catalyst comprising the same The present invention provides a catalyst component for ethylene polymerization, a process for preparing the same, a catalyst comprising the same, and a process for polymerizing ethylene using the catalyst. The catalyst component comprises a reaction product, suppor... | 12/26/2006 |
| 7148173 | Catalytic systems for the polymerization and copolymerization of alpha-olefins Heterogeneous catalytic compositions obtained by reacting a porous inorganic support with an alumoxane and subsequently supporting at least one metallocene compound thereon. A process for polymerization of α-olefins in a slurry or in a gas phase, the process cataly... | 12/12/2006 |
