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| Number | Title | Issue Date |
| 7638585 | Catalyst flow Disclosed are catalyst systems and methods of making the catalyst systems/supports for the polymerization of an olefin containing a solid titanium catalyst component and an antistatic agent. Also disclosed are methods of making a polyolefin involving contacting an o... | 12/29/2009 |
| 7399812 | Silicon ether compounds and a method for the preparation thereof The present invention relates to silicon ether compounds having a general formula (I), a method for the preparation thereof and use thereof as a component of catalysts for polymerization of olefins. In particular, in propylene polymerization, catalyst systems compri... | 07/15/2008 |
| 7354981 | Polyethylene catalyst and a process for preparing the same The present invention discloses a polyethylene catalyst and a process for preparing the same, said catalyst being composed of a main component of catalyst and a cocatalyst, wherein the main component of catalyst is prepared by reacting: (1) a magnesium-alcohol compl... | 04/08/2008 |
| 7348381 | High modulus, high ductility polyolefins Provided herein are propylene polymers which are capable of being used as thermoplastic polyolefins just as they emerge from the reactor system described, without further compounding of components which substantially modify the physical properties of the polymers, a... | 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 |
| 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 |
| 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 |
| 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 |
| 7169727 | Process for forming a ziegler-natta catalyst system having a controlled morphology A pre-catalyst is formed by reacting butylethylmagnesium with an alcohol to form a magnesium alkoxide compound, followed by contacting the magnesium alkoxide compound with a phosphorous compound to form a magnesium alkoxide phosphorous compound mixture. The magnesiu... | 01/30/2007 |
| 7141635 | Catalyst composition and polymerization process using mixtures of selectivity control agents A catalyst composition for the polymerization of olefins and process for the use thereof, comprising the combination of one or more Ziegler-Natta catalysts, comprising one or more transition metal compounds, one or more aluminum containing cocatalyts, and a mixture ... | 11/28/2006 |
| 7084217 | High activity polyethylene catalysts prepared with borates reagents An improved supported Ziegler-Natta catalyst especially useful for olefin polymerisation, the catalyst including a carrier, an organomagnesium compound, a borate compound, and one transition metal compound. ... | 08/01/2006 |
| 7071137 | Method of making a ziegler-natta catalyst A method for making a Ziegler-Natta catalyst support includes the steps of contacting a fumed silica with a surface modifying agent such as a compound having the formula RMgX MgR′R″ wherein R, R′ and R″ are each individually a moiety selected from an alkyl g... | 07/04/2006 |
| 7056592 | Propylene homopolymers for biaxially oriented films Propylene homopolymers useful in the manufacture of biaxially oriented films are provided. More particularly, the propylene homopolymers of the present invention are useful as core material for a multilayer biaxially oriented film. The propylene homopolymers of the ... | 06/06/2006 |
| 7022795 | Highly crystalline propylene homopolymers Propylene homopolymers, wherein, in their separation according to tacticity by first dissolving the polymers in boiling xylene, then cooling the solution to 25° C. at a cooling rate of 10° C./h and then, with ascending temperature, separating the propylene homopol... | 04/04/2006 |
| 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 |
| 6962889 | Spherical catalyst for olefin polymerization Disclosed are catalyst systems and methods of making the catalyst systems/supports for the polymerization of an olefin containing a solid titanium catalyst component having a substantially spherical shape and containing a titanium compound and a support made from a ... | 11/08/2005 |
| 6936671 | Process for copolymerizing ethylene with vinylsilanes A process for copolymerizing ethylene with vinylsilanes is disclosed. The process uses a Ziegler-Natta catalyst and cocatalyst wherein the Ziegler-Natta catalyst is prepared from a Group 4-6 halogen-containing transition metal and a mixture of an organomagnesium com... | 08/30/2005 |
| 6924343 | Olefin polymerization catalyst component, its preparation and use A process for polymerizing olefins using a high activity catalyst. The catalyst utilize in the present process has a good balance in activity and can be used to carry out ethylene polymerization at high and low melt flow rates to produce low gel or gel free product.... | 08/02/2005 |
| 6767857 | Process for forming a Ziegler-Natta catalyst system having a controlled morphology A pre-catalyst is formed by reacting butylethylmagnesium with an alcohol to form a magnesium alkoxide compound, followed by contacting the magnesium alkoxide compound with a phosporous compound to form a magnesium alkoxide phosphorous compound mixture. The magnesium... | 07/27/2004 |
| 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 |
| 6544920 | Components and catalysts for the polymerization of olefins Solid catalyst component for the polymerization of olefins, includes the product of the direct reaction, with no subsequent reactions with reducing organometallic compounds, between a titanium compound and a support obtained by contacting a metal oxide co... | 04/08/2003 |
| 6503993 | Propylene polymers and products thereof The present invention concerns nucleated propylene polymers having a xylene soluble fraction at 23° C. of less than 2.5%, a crystallization temperature of over 124 ° C. and a tensile modulus of greater than 2,000 MPa. These polymers can be prepared by n... | 01/07/2003 |
| 6495634 | Propylene polymers Propylene polymers containing a matrix of a propylene homopolymer and a copolymer of propylene and other alkenes, wherein, during the separation of the propylene polymers according to tacticity and comonomer distribution of the polymer chains, by first di... | 12/17/2002 |
| 6486089 | Bimetallic catalyst for ethylene polymerization reactions with uniform component distribution The invention relates to a process for uniformly dispersing a transition metal metallocene complex on a carrier comprising (1) providing silica which is porous and has a particle size of 1 to 250 microns, having pores which have an average diameter of 50 to 50... | 11/26/2002 |
| 6486275 | Process for preparing polyolefins A process for preparing polyolefins by polymerizing or coploymerizing an olefin or olefins in the presence of a catalyst comprising a solid catalyst component and an organometallic compound is provided.... | 11/26/2002 |
| 6469112 | (Cycloalkyl)methyl silanes as external donors for polyolefin catalysts One aspect of the present invention relates to a catalyst system for use in olefinic polymerization, containing a solid titanium catalyst component; an organoaluminum compound having at least one aluminum-carbon bond; and an organosilicon compound compris... | 10/22/2002 |
| 6437065 | Reactive systems from polymerizable monomers which comprise peroxides and stabilized alkylboron compounds Reactive systems for polymerizing ethylenically unsaturated compounds comprising a first component, comprised of ethylenically unsaturated compounds capable of polymerization, and a second component of a hardener system comprised of organoboron compounds ... | 08/20/2002 |
| 6337377 | Process for producing olefin polymers, olefin-polymerizing catalyst and polyproylene for biaxially oriented film produced with said catalyst A process for producing an olefin polymer using a catalyst in which (A) is a solid catalyst component which includes magnesium, titanium, halogen and an electron donative compound as essential constituents; (B) is an organoaluminum component; and (C) is a... | 01/08/2002 |
| 6313225 | Catalyst for olefin (co-)polymerization and method for producing the same Disclosed is a catalyst for olefin (co-)polymerization comprising a transition metal compound catalytic component which contains at least a titanium compound and an -olefin (co-)polymer (A) supported by the catalyst, wherein said -olefin (co... | 11/06/2001 |
| 6291384 | High activity catalyst prepared with alkoxysilanes An ethylene-alpha-olefin copolymerization catalyst is prepared by impregnating a silica calcined at elevated temperature sequentially with an organomagnesium compound such as dialkylmagnesium compound, a silane compound which is free of hydroxyl groups, s... | 09/18/2001 |
| 6271167 | Catalyst for olefin polymerization and method for preparing polyolefins Disclosed are a catalyst for polymerizing olefins containing a solid catalyst component containing titanium, magnesium and halogen as essential components (component (A)); an organic aluminum compound (component (B)); and a silane compound (component (C))... | 08/07/2001 |
| 6133188 | Process for preparing an ethylene polymerization catalyst and ethylene polymerization process A preparation process for a catalytic support, based on a special alumina modified with varying quantities of magnesium chloride is described, a higher rate of MgCl2 leading to a lesser quantity of heavy molecular chains in the final polymer. T... | 10/17/2000 |
| 6111038 | Process for preparing solid titanium catalyst component for olefin polymerization and process for preparing polyolefin The present invention intends to provide a process for preparation of a solid titanium catalyst component for an olefin polymerization excellent in polymerization activity per unit catalyst, and a process for preparation of a polyolefin using a catalyst c... | 08/29/2000 |
| 6103655 | Carrier for olefin polymerization catalysts Procedure for the preparation of a solid carrier for olefin polymerization catalysts, comprising the steps: a) impregnating a silica with Mg-chloride solubilized in ethylbenzoate, in the presence of further electron donors, b) optionally drying the impregnated... | 08/15/2000 |
| 6090903 | Propylene homopolymer A propylene homopolymer having a high stereo-regularity and an excellent processability during sheet or film formation, characterized in that it exhibits a melt flow rate (MFR) of from 0.1 to 20 g/10 min., a xylene-soluble component content of not more th... | 07/18/2000 |
| 6051523 | Catalyst systems of the type comprising the Ziegler-Natta catalysts Catalyst systems of the type comprising the Ziegler-Natta catalysts contain, as active components, a) a titanium-containing solid component which contains titanium, magnesium, halogen and a carboxylic ester as an electron donor, and, as a cocatalyst, b) a... | 04/18/2000 |
| 6043326 | Process for copolymerizing ethene and alpha-olefins Ethene having a profitable -olefin distribution and an -olefin copolymer have been prepared with a process comprising reacting of at least the following components with each other: a) a procatalyst comprising a halogen compound of a transition me... | 03/28/2000 |
| 6034188 | Process for preparing polyolefins An olefin polymerization is conducted in the presence of a catalyst comprising a solid catalyst component and an organometallic compound, said solid catalyst component being prepared by reacting the following components [I], [II] and [III] with one anothe... | 03/07/2000 |
| 5965478 | Solid catalyst component and catalyst for polymerization of olefins A solid catalyst component for polymerization of olefins prepared by reacting a titanium halide, a diester of aromatic dicarboxylic acid and a dialkoxymagnesium having a bulk density of at least 0.25 g/ml and an average particle size of 1 to 100 μm. The ... | 10/12/1999 |
