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| Number | Title | Issue Date |
| 8173569 | 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 in... | 05/08/2012 |
| 8133832 | Catalyst system for polymerization of olefinic monomers, process for preparing polymers, and polymers prepared by the process The present invention relates to new catalyst supports comprising nanofibers, a catalyst system comprising these supports as well as a process for preparing nanocomposites and the nanocomposites prepared. The invention especially concerns a supported catalyst system... | 03/13/2012 |
| 7612008 | Metathesis catalysts The invention relates to polymeric transition metal catalysts, to processes for preparing them, to intermediates and also to the use of the transition metal catalysts as catalysts in organic reactions, in particular in olefin metathesis reactions. ... | 11/03/2009 |
| 7528090 | Supported polymerisation catalysts A supported polymerisation catalyst system comprises a porous support, a polymerisation catalyst and a cocatalyst wherein the support has been treated with an inert material such as polyisobutene. The support is preferably silica and is preferably treated with the i... | 05/05/2009 |
| 7348383 | Spray-dried, mixed metal ziegler catalyst compositions A Ziegler-Natta catalyst composition comprising a solid mixture formed by halogenation of: Al) a spray-dried catalyst precursor comprising the reaction product of a magnesium compound, a non-metallocene titanium compound, and at least one non-metallocene compound of... | 03/25/2008 |
| 7341971 | Production of olefin polymerization catalysts The invention provides a process for producing an olefin polymerization catalyst, comprising an organometallic compound of a transition metal or of an actinide or lanthanide, in the form of solid catalyst particles, comprising forming a liquid/liquid emulsion system... | 03/11/2008 |
| 7300901 | Hollow beads of polyethylene The present invention discloses a method for preparing hollow beads of polyethylene of controlled morphology and size. ... | 11/27/2007 |
| 7271119 | Process for preparing an olefin polymerization catalyst component Process for preparing an olefin polymerisation catalyst component in the form of particles having a predetermined size range, said process comprising the steps of a) preparing a solution of a complex of a Group 2 metal and an electron donor by reacting a compound of... | 09/18/2007 |
| 7259125 | Catalyst compositions comprising small silica support materials and methods of use in polymerization reactions Improved catalyst compositions, and polymerization processes using such improved catalyst compositions, are provided. An example of an improved catalyst composition is a supported catalyst system that includes at least one titanium compound, at least one magnesium c... | 08/21/2007 |
| 7235614 | Methods for injecting catalyst into a polymerization reactor A polymerization process and a catalyst delivery system are provided. For example, a polymerization process is described, including providing a conduit having a catalyst inlet, a first propylene stream inlet located downstream of the catalyst inlet, and a second pro... | 06/26/2007 |
| 7232785 | Solid catalytic component and catalytic system of the ziegler-natta type, process for their preparation and their use in the polymerization of alk-1-enes The present invention relates to a new solid catalytic component, which can be used in combination with an aluminum compound as co-catalyst and optionally an external electron donor as additional co-catalyst to form a catalytic system of the Ziegler-Natta-catalyst-t... | 06/19/2007 |
| 7223711 | Pre-polymerized catalyst components for the polymerization of olefins Catalyst components for the preparation of ethylene (co)polymers capable to produce polymers with high bulk density, to avoid the problems of formation of fines and that have a high activity are provided. Said catalyst components are characterized by comprising a no... | 05/29/2007 |
| 7217775 | Emulsion particles as reinforcing fillers A rubber composition having improved processability and which provides a vulcanized rubber exhibiting excellent wear resistance and good tensile strength to service temperatures of up to about 150° C. The composition comprises (1) a crosslinked polymer particle hav... | 05/15/2007 |
| 7160833 | Spray-dried polymerization catalyst and polymerization process employing same A spray-dried composition comprising the reaction product of a magnesium halide, a solvent, an electron donor compound, and a transition metal compound and an inert filler comprising substantially spherical particles having an average particle size ranging from abou... | 01/09/2007 |
| 7153915 | Precision fragmentation assemblages and olefin polymerization catalysts made therefrom A precision fragmentation assemblage is disclosed, along with precision fragmentation assemblage catalysts derivable therefrom. A method for the preparation of a precision fragmentation assemblage is also disclosed, along with a method for preparing precision fragme... | 12/26/2006 |
| 7125939 | Olefin polymerization with polymer bound single-site catalysts Disclosed is a process for polymerizing olefins. The process comprises polymerizing one or more olefins with a single-site catalyst in two or more polymerization stages. The catalyst comprises a transition metal complex, an activator, and a hydroxyl functional polym... | 10/24/2006 |
| 7109277 | Polymerization catalysts A process to produce a polymer is provided. The process comprising contacting a treated solid oxide compound, an organometal compound, and an organoaluminum compound in the presence of an alpha olefin under polymerization conditions to produce the polymer. ... | 09/19/2006 |
| 7084216 | Process for the polymerization of olefins The present invention relates to a process for homopolymerization of ethylene or copolymerization of ethylene with alpha-olefins by contacting ethylene or ethylene and alpha-olefin with a catalyst composition comprising: (a) a solid catalyst precursor comprising at ... | 08/01/2006 |
| 7084220 | Catalyst system for preparing styrene polymer and method for preparing of styrene polymer using the same The present invention relates to a catalyst system for preparing styrene polymer and a method of preparing styrene polymer using the same, more particularly to a catalyst system for preparing styrene polymer capable of preventing coagulation of polymer to the reacto... | 08/01/2006 |
| 7078469 | Halogenated organic particles for catalyst supports Polymeric supports, which have been treated with a halosulfonic acid, increase the activity of single-site catalysts used with aluminoxane co-catalysts, resulting in improved ethylene polymerization. The present invention seeks to provide polymeric catalyst supports... | 07/18/2006 |
| 7074736 | Hydrozirconated matrix and process for polyolefin production A hydrozirconated matrix for the production of polyolefins is disclosed. The hydrozirconated matrix is prepared from the reaction of an organozirconium composition and an olefin based material. A process is described for using the hydrozirconated matrix to prepare a... | 07/11/2006 |
| 7022793 | Process for the treatment of polymer compositions A process for the preparation of heterophasic elastomeric polymer comprising the step of polymerizing ethylene, an alpha-olefin CH2═CHL, where L is an alkyl, cycloalkyl or aryl radical with 1–10 carbon atoms and a non-conjugated diene in the presence of a cataly... | 04/04/2006 |
| 7009012 | Supported catalyst for producing syndiotactic styrenic polymer The present invention provides a supported catalyst comprising (A) a polymer (B) a supporter, (C) a transition metal compound, and optionally (D) (a) a compound which can form an ionic complex by the reaction with the transition metal compound or (b) a specific oxyg... | 03/07/2006 |
| 7005487 | Catalyst system for the polymerization of olefins A solid catalyst component for the polymerization of olefins, comprising: an inert porous support, Mg, Ti, halogen and an electron donor selected from succinates of formula (I) wherein the radicals R1 and R2 equal to or different form each othe... | 02/28/2006 |
| 7005398 | Olefin polymerization catalyst, catalyst component for olefin polymerization, method of storing these, and process for producing olefin polymer A catalyst is used which comprises a cocatalyst component wherein a non-coordinating ion-containing compound is chemically bonded to a fine particulate carrier, together with a metallocene compound and a specific hydrocarbon. There are provided an olefin polymerizat... | 02/28/2006 |
| 7001862 | Catalyst composition for polymerization of olefins and method for preparing the same The present invention relates to a catalyst composition for polymerization of olefins comprising: (a) a solid catalyst pre cursor comprising at least one vanadium compound, at least one magnesium compound and a polymeric material or a solid catalyst precursor compri... | 02/21/2006 |
| 6995235 | Methods of producing polyolefins and films therefrom Films and methods of forming films comprising first combining in a reactor olefins, a catalyst composition and an activator; wherein the activator is present from less than 50 wt % in a diluent by weight of the activator and diluent; followed by isolating a polyolef... | 02/07/2006 |
| 6992153 | Multi-stage process for the (CO) polymerization of olefins Multi-stage process for the polymerization of olefins CH2═CHR, where R is hydrogen or a C1–C10 alkyl, cycloalkyl or aryl radical, comprising: (I) a first polymerization stage carried out in the presence of a catalyst comprising t... | 01/31/2006 |
| 6969747 | Olefin polymerization titanium catalyst An olefin polymerization titanium catalyst. It comprises a titanium compound and an organoaluminium compound cocatalyst supported on a soluble polysulfone comprising free reactive sulfone groups. The molar ratio of titanium of aluminum is 1–10:200 and the weight r... | 11/29/2005 |
| 6956003 | Catalyst system for ethylene (co)-polymerization A catalyst system for (co)-polymerizing ethylene or ethylene with α-olefin is disclosed. The catalyst system utilizes a catalyst component that contains the product of a reaction of an early transition metal complex such as a titanium alkoxide with a cyclic diene-c... | 10/18/2005 |
| 6933353 | Olefin polymerization process A method for preparing a supported organometallic complex is disclosed. An organometallic complex is combined with a support material that has been treated with an organozinc compound. The organometallic complex comprises a Group 3 to 10 transition metal and an inde... | 08/23/2005 |
| 6916761 | Polymer-supported Lewis acid catalyst In order to provide a novel Lewis acid catalyst, which shows high reaction activity in aqueous medium, is easily recovered, and is excellent in reusability, a Lewis acid group expressed by the general formula (I): MXn (I) (wherein... | 07/12/2005 |
| 6900153 | Supported olefin polymerization catalysts A method for forming supported late transition metal olefin polymerization catalysts is described in which an already formed transition metal complex, usually containing a reactive functional group, is placed on a support containing a complementary reactive function... | 05/31/2005 |
| 6878787 | Polyamide supported metallocene catalysts Supported stereospecific catalysts and processes for the stereotactic propagation of a polymer chain derived from ethylenically unsaturated monomers such as the polymerization of propylene to produce syndiotactic polypropylene or isotactic polypropylene. The support... | 04/12/2005 |
| 6815390 | Supported fluorous biphasic catalyst system The present invention relates to a new catalyst system for fluorous biphasic catalysis processes which comprises functionalized polymeric beads, monodisperse SiO2 or SiO2 flakes associated with the catalyst. These functionalized particles are u... | 11/09/2004 |
| 6803339 | Latent metallocene catalyst systems for olefin polymerization A metallocene catalyst may be temporarily and reversibly passivated by contact with an effective amount of an unsaturated hydrocarbon passivating compound. ... | 10/12/2004 |
| 6750303 | Functional organic particles for catalysts supports Functional polymers containing hydroxyl groups as supports for use with catalysts can increase the activity of these catalysts which results in improved ethylene polymerization. The present invention seeks to provide catalysts with improved activity by incorporating... | 06/15/2004 |
| 6750170 | Sweet MAO Single site catalysts which contain a transition metal, a cyclopentadienyl may be activated with alumoxanes in the gas, solution or group-containing ligand, and a phosphinimine ligand slurry phase polymerization of olefin. Alumoxanes contain residual aluminum alkyls... | 06/15/2004 |
| 6743873 | Olefin polymerization catalyst composition and preparation thereof A catalyst composition useful for catalyzing the polymerization of olefinic monomers is disclosed, along with a polymerization method using those catalyst compositions to prepare a variety of polyolefins from olefinic monomers. A method for preparation of the cataly... | 06/01/2004 |
| 6730753 | Catalyst systems of the ziegler-natta type and a process for preparing them Catalyst systems of the Ziegler-Natta type, which are suitable for the polymerization of olefins are prepared by: A) bringing an inorganic metal oxide on which a magnesium compound has been deposited into contact with a tetravalent titanium compound, B... | 05/04/2004 |
