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| Number | Title | Issue Date |
| 7754833 | Process for polymerization or copolymerization of ethylene Provided is a process for polymerization and copolymerization of ethylene, specifically comprising carrying out polymerization or copolymerization ethylene in the presence of (a) a solid complex titanium catalyst which is produced by the process comprising: (i) prep... | 07/13/2010 |
| 7439313 | Magnesium dichloride-ethanol adducts and catalyst components obtained therefrom A MgCl2.mEtOH.nH2O adducts, where 3.4 | 10/21/2008 |
| 7427653 | Catalyst components for the polymerization of olefins A catalyst component for olefin (co)polymerization, and in particular for the preparation of LLDPE, comprising Mg, Ti, halogen and an electron donor compound (ED) belonging to ethers, esters, amines, ketones, or nitriles, characterized in that the molar ratio Mg/Ti ... | 09/23/2008 |
| 7381780 | 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... | 06/03/2008 |
| 7365138 | Pretreated and prepolymerized polyolefin catalyst, production thereof and method of use A method of modifying a Ziegler-Natta type polyolefin catalyst comprises contacting the Ziegler-Natta catalyst with olefin monomer to form a prepolymerized catalyst. The prepolymerized catalyst can comprise a reduced number of catalyst particles having a size of 40 ... | 04/29/2008 |
| 7326372 | Method for the production of alkyl lithium compounds by means of spraying of lithium metal A method for the production of alkyl lithium compounds is disclosed, in which metallic lithium is reacted with an alkyl halide in a solvent, whereby the metallic lithium is introduced in the form of lithium particles, generated by spraying molten lithium into an ine... | 02/05/2008 |
| 7307036 | Highly active alpha-olefin polymerization catalyst A highly active alpha-olefin polymerization catalyst component is disclosed. In the presence of a co-catalyst, the catalyst component is useful for the production of LLDPE resins. The catalyst component is produced by a method whereby organic silicon compounds are r... | 12/11/2007 |
| 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 |
| 7235615 | Synthetic polymers with highly-functionalized liquid-rubber chain-end moieties A method is provided for synthesizing a polymer that has highly-functionalized chain-end moieties. The method functionalizes liquid rubber to terminate a metallic or organometallic initiated living polymer. After the living polymer has been terminated with the funct... | 06/26/2007 |
| 7220694 | Magnesium compound, olefin polymerization catalyst, and method for producing olefin polymer The invention relates to a magnesium compound effective in producing olefin polymers having an increased bulk density and a narrowed particle size distribution, not lowering the stereospecificity of the polymers produced and not lowering the polymerization activity ... | 05/22/2007 |
| 7202191 | Polymerization catalyst system using n-butylmethyldimethoxysilane for preparation of polypropylene film grade resins It has been discovered that using n-butylmethyldimethoxysilane (BMDS) as an external electron donor for Ziegler-Natta catalysts can provide a catalyst system that may prepare polypropylene films with improved properties. The catalyst systems of the invention provide... | 04/10/2007 |
| 7196152 | Modified Ziegler catalyst, process for preparing it and process for preparing poly-1-olefins in its presence The invention relates to a modified Ziegler catalyst for preparing a poly-1-olefin in suspension, in solution or in the gas phase, which catalyst comprises the reaction product of a magnesium alkoxide (component a) with a transition metal compound (component b) and ... | 03/27/2007 |
| 7169871 | Propylene polymers The present invention relates to propylene polymers made by using catalyst components for the polymerization of olefins comprising Mg, Ti, halogen and at least two electron donor compounds, said catalyst component being characterized by the fact that at least one of... | 01/30/2007 |
| 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 |
| 7157532 | Method for the production of olefin polymers and selected catalysts A process for preparing olefin homopolymers or copolymers by polymerization of at least one olefin in a hydrocarbon (mixture) in the presence of a molar mass regulator, a mixed catalyst and a substance which increases the electrical conductivity of the hydrocarbon (... | 01/02/2007 |
| 7148302 | Catalyst for polymerization of norbornene This invention is based upon the discovery that a catalyst system which is comprised of (a) palladium or a palladium compound and (b) a fluorinated alcohol is effective for polymerizing norbornene-functional monomers into polynorbornene-functional polymers. It has b... | 12/12/2006 |
| 7129303 | Method for producing homo- and co-polymers of ethylene The present invention provides a method for producing homo- and co-polymers of ethylene, or more particularly a method for producing homo- and copolymers of ethylene in the presence of (a) a solid titanium catalyst produced by preparing a magnesium solution by conta... | 10/31/2006 |
| 7109143 | Polymerization catalyst system using n-butymethyldimethoxysilane for preparation of polypropylene film grade resins It has been discovered that using n-butylmethyldimethoxysilane (BMDS) as an external electron donor for Ziegler-Natta catalysts can provide a catalyst system that may prepare polypropylene films with improved properties. The catalyst systems of the invention provide... | 09/19/2006 |
| 7091289 | Solid catalyst component for polymerization of ethylene, preparation thereof and a catalyst containing the same The present invention provides a catalyst component used for homopolymerization or co-polymerization of ethylene, comprising at least one suitable electron donor compound supported on a composition containing magnesium and titanium, wherein the electron donor compou... | 08/15/2006 |
| 7087688 | Magnesium dichloride-ethanol adduct and catalyst components obtained therefrom A MgCl2·mEtOH·nH2O adducts, where 3.4 | 08/08/2006 |
| 7060763 | Magnesium dichloride-ethanol adducts and catalyst components obtained therefrom The present invention relates to a MgCl2.mEtOH adduct in which m is from 2.5 to 3.2 optionally containing water up to a maximum of 1% wt based on the total weight of the adduct, characterized by a DSC profile in which the highest melting Temperature (Tm) ... | 06/13/2006 |
| 7049377 | 1,3-diethers and components and catalysts for the polymerization of olefins, containing said diethers Cyclopolyenic 1,3-diethers wherein the carbon atom in position 2 belongs to a particular cyclic or polycyclic structure containing two or three unsaturations, solid catalyst components and catalysts therefrom, the catalysts comprising the reaction product of: ... | 05/23/2006 |
| 7045480 | Treatment of a titanium tetrachloride-containing waste stream The invention relates to a process to increase the amount of TiCI4 that is retrieved from a waste stream comprising one or more titanium (halo) (alk) oxides while also reducing the quantity and/or hazard of the resulting waste. Valuable solvents/diluents ... | 05/16/2006 |
| 7026265 | Catalyst component comprising magnesium, titanium, a halogen and an electron donor, its preparation and use Process for the preparation of a particular olefin polymerisation catalyst component including magnesium dihalide, titanium tetrahalide and a carboxylic acid ester, in which the precursors of its constituents are reacted in solution from which the component is preci... | 04/11/2006 |
| 7022797 | Polymerization process A monomer stream containing propylene is supplied to a polymerization reactor which is operated under temperature and pressure conditions effective for the production of a stereoregular propylene polymer fluff. A titanium-based supported Ziegler-Natta catalyst havin... | 04/04/2006 |
| 7019097 | Process for the (co)polymerization of ethylene A process for the (co)polymerization ethylene, optionally in mixtures with olefins CH═CHR in which R is hydrogen or a hydrocarbyl radical with 1–12 carbon atoms, carried out in the presence of a catalyst system comprising (A) a solid catalyst component which com... | 03/28/2006 |
| 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 |
| 6998458 | Butene-1 (co)polymers and process for their preparation The present invention relates to butene-1 homopolymers, or copolymers containing up to 20% by weight of alpha olefins having from 2 to 10 carbon atoms other than butene-1, characterized by the following properties: (i) a Molecular Weight Distribution (MWD) in terms ... | 02/14/2006 |
| 6982237 | Spray-dried polymerization catalyst and polymerization processes employing same A spray-dried catalyst precursor composition and method of making a spray-dried catalyst precursor composition with an inert filler, magnesium, a transition metal, solvent, and one electron donor compound. The catalyst precursor composition is substantially free of ... | 01/03/2006 |
| 6967231 | Olefin polymerization process A process for polymerizing ethylene is disclosed. A magnesium chloride-alcohol is used to support an organometallic complex comprising a Group 3 to 10 transition metal and an indenoindolyl ligand. The supported organometallic complex is mixed with an activator and e... | 11/22/2005 |
| 6958378 | Method for producing homo-and co-polymers of ethylene The present invention provides a method for producing homo- and co-polymers of ethylene, or more particularly a method for producing homo- and co-polymers of ethylene in the presence of (a) a solid titanium catalyst produced by preparing a magnesium solution by cont... | 10/25/2005 |
| 6956092 | Poly (meth) acrylamide with a high stereoregularity and process for producing the same The present invention provides a novel high-molecular substance having a unique function and a process for producing the same. That is, it is a poly(meth)acrylamide which has a syndiotacticity of 50% or lower and is highly isotactic or heterotactic. The poly(meth)ac... | 10/18/2005 |
| 6916895 | Ziegler-Natta catalyst for tuning MWD of polyolefin, method of making, method of using, and polyolefins made therewith A new synthesis of a Ziegler-Natta catalyst uses a multi-step preparation that includes treating a magnesium dialkoxide compound with halogenating/titanating agents, an organoaluminum preactivating agent, and a heat treatment. The catalyst may be used in the polymer... | 07/12/2005 |
| 6900281 | Gas phase olefin polymerizations using dual donor catalyst systems A gas-phase olefin polymerization process in a plug flow reactor uses a catalyst system containing a magnesium halide supported titanium-containing component, an organoaluminum component, and at least one external electron donor component; in the process a first ext... | 05/31/2005 |
| 6897274 | Prepolymerization method of α-olefin The present invention relates to a method for the prepolymerization of α-olefin in the presence of a catalyst system which comprises (a) a magnesium supported solid complex titanium catalyst and (b) an organometallic compound of metal of Group I or III of the Perio... | 05/24/2005 |
| 6891019 | Protected aminofunctionalized polymerization initiators and methods of making and using same Anionic polymerization initiators useful in the preparation of polymers having a protected amine functional group. The amine functionality includes a first protecting group, which can be aralkyl, methyl, allyl or tertiary alkyl group. The other of the amine protecti... | 05/10/2005 |
| 6870022 | Process for producing α-olefin polymer An α-olefin polymer having extremely high stereoregularity, exhibiting excellent fluidity and containing a decreased amount of catalyst residues in the polymer can be obtained industrially advantageously in accordance with a process for producing an α-olefin polym... | 03/22/2005 |
| 6867160 | High activity catalyst for high molecular weight polyolefins By controlling the hold up times and temperatures for mixing the components of aluminum, titanium and magnesium based catalyst for solution polymerization it is possible to prepare a catalyst having a high activity, which prepares high molecular weight polyolefins. ... | 03/15/2005 |
| 6861487 | Catalyst precursor for the polymerization of olefins and polymerization process using the same The present invention relates to a catalyst precursor for homo- or copolymerization of olefins comprising a metallocene compound, a magnesium containing compound and a thermoplastic polymer support, and optionally further comprising a metal alkoxy compound, an alumi... | 03/01/2005 |
| 6858685 | Solid catalyst component for olefin polymerization, process for producing the same, process for producing catalyst for olefin polymerization, and process for producing olefin polymer There is provided a process for producing a catalyst for olefin polymerization, which comprises the step of contacting (1) an organ aluminum compound, (2) an external electron donor compound and (3) a solid catalyst component obtained by a process comprising the ste... | 02/22/2005 |
