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Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 7514386 | Chlorinated promoters for vanadium-based polymerization catalysts Promoters are described for vanadium-based catalysts used in the (co)polymerization of olefins and, in particular, in the production of ethylene/propylene (EPR) or ethylene/propylene/diene (EPDM) elastomeric copolymers. The promoters of the present invention belong ... | 04/07/2009 |
| 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 |
| 7420021 | Self-extinguishing catalyst composition with monocarboxylic acid ester internal door and propylene polymerization process A catalyst composition for the polymerization of propylene comprising one or more Ziegler-Natta procatalyst compositions comprising one or more transition metal compounds and one or more monoesters of aromatic carboxylic acid internal electron donors; one or more al... | 09/02/2008 |
| 7393806 | Catalyst composition with monocarboxylic acid ester internal donor and propylene polymerization process A catalyst composition for the polymerization of propylene comprising one or more Ziegler-Natta procatalyst compositions comprising one or more transition metal compounds and one or more monoesters of aromatic carboxylic acid internal electron donors; one or more al... | 07/01/2008 |
| 7393910 | Catalyst composition for ethylene polymerization A process for the polymerization of olefin monomers comprising contacting ethylene or a mixture of ethylene and one or more C4-8 α olefins with a catalyst composition comprising one or more Group 3-10 transition metal containing, Ziegler-Natta, procataly... | 07/01/2008 |
| 7388061 | Solid catalyst component for polymerization of olefins, catalyst comprising the same and use thereof The present invention provides a solid catalyst component for the polymerization of olefins, comprising magnesium, titanium, a halogen and an electron donor, wherein said electron donor comprises at least one selected from the group consisting of ester of polyol of ... | 06/17/2008 |
| 7381779 | Self limiting catalyst composition with dicarboxylic acid ester internal donor and propylene polymerization process A catalyst composition for the polymerization of propylene comprising one or more Ziegler-Natta procatalyst compositions comprising one or more transition metal compounds and one or more esters of aromatic dicarboxylic acid internal electron donors; one or more alum... | 06/03/2008 |
| 7365039 | Morphology controlled olefin polymerization process A catalyst composition, method of formation and process of use in the polymerization of olefin monomers, said composition comprising a catalyst compound, an activator capable of converting said catalyst compound into an active catalyst for addition polymerization, o... | 04/29/2008 |
| 7351778 | Catalyst component for olefin polymerization and catalyst comprising the same The present invention provides a catalyst component for polymerization of olefin CH2═CHR, in which R is hydrogen or C1-C12 alkyl or aryl, comprising magnesium, titanium, a halogen and an electron donor compound (a) which is at leas... | 04/01/2008 |
| 7351678 | Catalyst systems for Ziegler-Natta propene polymerisation The invention relates to the use of nitrogenous aluminium organyl complexes of general formula (I) as co-catalysts in heterogeneous polymerisation reactions of propene. In said formula: R, R′, R1 and R1′ independently of one another represe... | 04/01/2008 |
| 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 |
| 7329626 | Ziegler-Natta catalyst, preparation, and use for the polymerization of alkenes A method for making a solid catalytic component for a Ziegler-Natta catalyst includes contacting a particulate porous support with a solution of a hydrocarbon soluble organomagnesium precursor compound in a hydrocarbon solvent; and reacting said hydrocarbon soluble ... | 02/12/2008 |
| 7316987 | Components and catalysts for the polymerization of olefins Catalyst component for the polymerization of olefins obtainable by contacting: (i) a magnesium halide, or a suitable precursor; (ii) a monofunctional electron donor compound (MD) selected from ethers, esters, amines or ketones, used in such amounts to have Mg/MD mol... | 01/08/2008 |
| 7307035 | Magnesium dichloride-alcohol adducts and catalyst components obtained therefrom The present invention relates to an adduct comprising MgCl2, an alcohol (ROH) in which R is a C1-C10 hydrocarbon group, and a compound containing a transition metal M selected from the Groups 3 to 11 or the lanthanide or actinide groups of the ... | 12/11/2007 |
| 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 |
| 7256151 | Solid catalyst component for α-olefin polymerization, process for producing catalyst therefor, and process for producing α-olefin polymer A solid catalyst component for α-olefin polymerization, which comprises a titanium atom, a magnesium atom, a halogen atom, a phthalic acid ester compound, and a 1,3-diether compound, wherein an amount of the 1,3-diether compound contained in the solid catalyst comp... | 08/14/2007 |
| 7256150 | Preparation of olefin polymerization catalyst component A process for producing a Gp 2/transition metal olefin polymerisation catalyst component, in which a Gp 2 complex is reacted with a transition metal compound so as to produce an oil-in-oil emulsion, the disperse phase containing the preponderance of the Gp 2 metal b... | 08/14/2007 |
| 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 |
| 7223712 | Catalyst component for the (CO)polymerization of olefins An internal electron-donor compound selected from the 1,3-diethers of formula (I) in which R is a C1–C10 alkyl group, R1 is a linear or branched primary alkyl radical having at ... | 05/29/2007 |
| 7211534 | Preparation of a magnesium halide support for olefin polymerization and a catalyst composition using the same A magnesium halide support material for a polyolefin catalysts is disclosed. The magnesium halide of present invention is prepared by reacting magnesium with an alkylhalide in a non-polar hydrocarbon solvent. Preparation of the support does not require the use elect... | 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 |
| 7211538 | Catalytic systems for the polimerization and copolimerization of alpha-olefins Catalyst component for the polymerization of alpha-olefins in solution, in suspension, in gas phase at low and high pressure and temperature or in mass at high pressures and high or low temperatures, characterized in that is defined by general formulas I or II | 05/01/2007 |
| 7208435 | Solid catalyst component for olefin polymerization and catalyst A solid catalyst component for polymerization of olefins prepared by contacting (a) a dialkoxy magnesium compound, (b) a tetra-valent titanium halide, and (c) an electron donor compound of the formula R1R2C(COOR3)2 suspend... | 04/24/2007 |
| 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 |
| 7193022 | Method of polymerization and copolymerization of ethylene Disclosed is a method of polymerization and copolymerization of ethylene, which is carried out in the presence of (a) a solid titanium complex catalyst prepared by the steps of (i) preparing a magnesium solution by contacting halogenated magnesium compounds with alc... | 03/20/2007 |
| 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 |
| 7163905 | Polymerization catalyst system using di-sec-butyldimethoxysilane for preparation of polypropylene It has been discovered that using di-sec-butyldialkoxysilanes, such as di-sec-butyldimethoxysilane (DSBDMS), as external electron donors for Ziegler-Natta catalysts can provide a catalyst system that may prepare polypropylene films with improved properties and proce... | 01/16/2007 |
| 7153803 | High activity and good hydrogen response Ziegler-Natta polyethylene catalyst Disclosed are catalyst systems and methods of making the catalyst systems/supports for the polymerization of polyethylene containing a solid titanium catalyst component containing a titanium compound and a support made from a magnesium compound, an alkyl silicate, a... | 12/26/2006 |
| 7151071 | Method for preparation of a solid titanium catalyst for olefin polymerization The present invention relates to a method for preparing a solid titanium catalyst for olefin polymerization. The method for preparing a solid titanium catalyst for olefin polymerization according to the present invention comprises: preparing a magnesium compound sol... | 12/19/2006 |
| 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 |
| 7138469 | Process for the polymerization of olefins Process for the polymerization of olefins CH2═CHR, in which R is hydrogen or a hydrocarbon radical with 1–12 carbon atoms, carried out in the presence of a catalyst component (A) comprising Mg, Ti and halogen as essential elements and of a catalyst co... | 11/21/2006 |
| 7135531 | 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 an internal electron donor, a support made fro... | 11/14/2006 |
| 7135532 | Process for producing solid catalyst component and catalyst for α-olefin polymerization, and process for producing α-olefin polymer There are disclosed a process for producing a solid catalyst component and a catalyst for α-olefin polymerization, and a process for producing an α-olefin polymer, wherein the process for producing a solid catalyst component comprises the steps of: ... | 11/14/2006 |
| 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 |
| 7112642 | Highly stereoregular polypropylene with improved properties Propylene polymers having a content of isotactic pentads (mmmm) higher than 97%, molecular weight distribution, expressed by the formula (a) ratio, equal to or higher than 6 and a value of formula (b) ratio equal to or lower than 5.5. The said polymers are prepared ... | 09/26/2006 |
| 7109142 | Solid catalyst component and catalyst for olefin polymerization, and process for producing olefin polymer This invention concerns a solid catalyst component for olefin polymerization and the process for obtaining the catalyst component having titanium, halogen, magnesium, an organic acid ester and a relative surface area of 0.1–15 m2/g as measured according... | 09/19/2006 |
| 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 |
| 7081427 | Solid catalyst component for olefin polymerization A solid catalyst component for olefin polymerization comprising titanium, magnesium and a compound of the general formula (I) wherein R1 and R2 are independently a C3 straight or ... | 07/25/2006 |
| 7078362 | Carbene donor-modified Ziegler-Natta catalysts A modified Ziegler-Natta catalyst system comprising a titanium or vanadium compound, a magnesium compound, a carbene donor, and an aluminum compound is disclosed. The invention includes a process which comprises polymerizing an alpha-olefin in the presence of the ca... | 07/18/2006 |
| 7067451 | Soluble magnesium complexes useful for the production of polyolefin catalysts and catalysts prepared therewith A method of forming a polyolefin catalyst component includes halogenating metal complexes. The metal complexes result from reacting a metal alkoxide with an alcohol-ether. A particular non-limiting example is a magnesium complex formed by reacting magnesium alkoxide... | 06/27/2006 |
