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| Number | Title | Issue Date |
| 8003741 | Ziegler-Natta catalyst The present invention relates generally to catalysts, to methods of making catalysts, to methods of using catalysts, to methods of polymerizing, and to polymers made with such catalysts. More particularly, the present invention relates to polyolefin catalysts and to... | 08/23/2011 |
| 7999047 | Magnesium methoxide based catalyst precursors and catalyst components obtained therefrom Catalyst precursors comprising Mg, Ti, OMe and OR groups that are in molar ratios defined by the formula MgTin(OMe)(p)(OR)x in which n is from 0.1 to 1, p is ≧(2+4n), x is from 0 to 1 and R is C2-C15 hydrocarbon groups can be easil... | 08/16/2011 |
| 7985814 | Main catalyst component for olefin polymerization, a process for preparing the same and a catalyst comprising the same The present invention provides a main catalyst component for olefin polymerization, which is prepared by a process comprising the steps of: (i) reacting a magnesium compound in nascent state having a rational formula (RMgX)y(MgX2), in which R i... | 07/26/2011 |
| 7964678 | Catalyst for olefin polymerization and preparation thereof and polymerization process The catalyst for olefin polymerization contains three components A, B and C. The component A is a solid catalyst containing titanium, magnesium, chlorine element and an internal electron donor, the internal electron donor consists of 1,4-diether [2,2′-dialkoxy-1,1... | 06/21/2011 |
| 7888438 | Catalyst for olefin polymerization and process for olefin polymerization A catalyst for olefin polymerization of the present invention includes a solid titanium catalyst component (I) including titanium, magnesium, halogen, and a cyclic ester compound (a) represented by the following formula (1): ... | 02/15/2011 |
| 7888437 | Process for producing olefin polymer and solid titanium catalyst component The process for producing an olefin polymer according to the present invention is characterized in that it comprises polymerizing an olefin having 3 or more carbon atoms in the presence of a catalyst for olefin polymerization containing a solid titanium catalyst com... | 02/15/2011 |
| 7879959 | Catalyst components for the polymerization of olefins Catalyst components for the (co)polymerization of ethylene comprising Ti, Mg, halogen, ORI groups, where RI is a C1-C12 hydrocarbon group optionally containing heteroatoms, having ORI/Ti molar ratio in the range 0.1-1.5, a Mg/Ti molar ratio of less than 8, an amount... | 02/01/2011 |
| 7820773 | Olefin polymerisation catalyst The present invention relates to particulate olefin polymerization catalyst components comprising an alkaline earth metal, a compound of a transition metal and an electron donor, characterized in that the catalyst particle size distribution of the catalyst component... | 10/26/2010 |
| 7790818 | Process for preparing catalyst components for the olefin polymerization Process for the preparation of a solid catalyst component for the polymerization of olefins, the process comprising the steps of: —continuously contacting solid particles of a MgCl2.mROH adduct, wherein 0.5 | 09/07/2010 |
| 7776979 | Prepolymerized catalyst for olefin polymerization, process for polymerizing olefin by using the catalyst and polyolefin produced by the process The present invention relates to a prepolymerized catalyst for olefin polymerization, a process for polymerizing an olefin by using the catalyst and a polyolefin produced by the process, in which a Ziegler-Natta catalyst is prepolymerized sequentially using α-olefi... | 08/17/2010 |
| 7772338 | Use of a Ziegler-Natta catalyst to make a polypropylene homopolymer or random copolymer having a high melt flow rate The present invention relates to a process for the production of a high melt flow propylene homopolymer or random copolymer with low odor and low volatiles content, which is suitable for thin-walled injection molding applications, said process comprising the step of... | 08/10/2010 |
| 7737232 | Method for the production of water-free rare earth metal halogenides, synthesis mixtures containing water-free rare earth metal halogenides and use thereof A method for the production of water-free rare earth metal halogenides by reacting rare earth metal oxides with a halogentation agent. ... | 06/15/2010 |
| 7728084 | Polymerization process This invention is directed to processes of making polymer in the presence of a hydrofluorocarbon or perfluorocarbon and recovering the polymer. The processes provided enable polymerization processes to be practiced with minimal fouling in the reaction system, and to... | 06/01/2010 |
| 7671149 | Hydrogen response through catalyst modification The present invention provides a process for preparing a catalyst useful in gas phase polymerization of olefins wherein the hydrogen response of the catalyst can be improved by using a ketone as the electron donor in the catalyst. The catalyst consists of compounds ... | 03/02/2010 |
| 7649062 | Solid titanium catalyst component, catalyst for polymerization of olefin and process for producing olefin polymer A solid titanium catalyst component (I) of the present invention is characterized in that it contains titanium, magnesium, halogen, and a cyclic ester compound (a) represented by the following formula (1): ... | 01/19/2010 |
| 7605215 | Process for producing olefin copolymerization catalyst and process for producing olefin copolymer A process for producing an olefin copolymerization catalyst, comprising the step of contacting, with one another, (A) a solid catalyst component containing a titanium atom, a magnesium atom and a halogen atom, (B) an organoaluminum compound and/or organoaluminumoxy ... | 10/20/2009 |
| 7582712 | Alpha-olefins polymerization catalyst Methods and apparatus to form a catalyst precursor, comprising combining in a reactor magnesium, an alkoxysilane compound, a halogenized silicon compound, a halogenized transition metal compound, a substituted aromatic furan compound having a structural formula,... | 09/01/2009 |
| 7560521 | Components and catalysts for the polymerization of olefins A catalyst component for the polymerization of olefins comprising a titanium compound, a Mg-dihalide, a difunctional electron donor compound (ED) selected from diesters, diketones, diamines or diethers, and a monofunctional electron donor compound (MD) selected from... | 07/14/2009 |
| 7439313 | Magnesium dichloride-ethanol adducts and catalyst components obtained therefrom A MgCl2.mEtOH.nH2O adducts, where 3.4 | 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 |
| 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 |
| 7420022 | Polymerization catalyst system utilizing external donor systems and processes of forming polymers therewith External donor systems, catalyst systems and olefin polymerization processes are described herein. The external donor systems generally include a first external donor represented by the general formula SiR2m(OR3)4-m, where... | 09/02/2008 |
| 7402637 | Method for producing a poly-1-olefin in the presence of a Ziegler catalyst The invention relates to a method for producing a poly-1-olefin by polymerization of a 1-olefin of the formula R4C═CH2, in which R4 is hydrogen or an alkyl radical having from 1 to 10 carbon atoms, in suspension, in solution or in ... | 07/22/2008 |
| 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 |
| 7399809 | Modifying polyethylene made by Ziegler or single-site catalyst with free radical initiator A method of modifying a polyethylene is disclosed. In the method ethylene or a mixture of ethylene and a C3-C10 α-olefin is polymerized in an organic solvent with a Ziegler or single-site catalyst to form an initial polyethylene solution. The initial polyethylene s... | 07/15/2008 |
| 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 |
| 7388060 | Catalyst component for olefin (co)polymerization, preparation thereof, a catalyst comprising the same and use thereof The invention relates to a catalyst component for olefin (co)polymerization, to preparation thereof, to a catalyst comprising the same, and to use thereof in olefin (co)polymerization. The catalyst component of the invention comprises magnesium, titanium, halogen, i... | 06/17/2008 |
| 7378476 | Olefin polymerization process in the presence of a radical generating system An olefin polymerization process comprises gas-phase polymerization of at least one olefin monomer in a reactor using a Ziegler-Natta or metallocene catalyst system in the presence of at least one suitable radical-generating compound in an amount sufficient for poly... | 05/27/2008 |
| 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 |
| 7371802 | Components and catalysts for the polymerization of olefins The present invention relates to a solid catalyst component for the polymerization of olefins CH2═CHR in which R is hydrogen or a hydrocarbon radical with 1-12 carbon atoms, comprising Mg, Ti, halogen and an electron donor selected from thiophene dicarb... | 05/13/2008 |
| 7365137 | Multistep process for the (co) polymerization of olefins A multistep process for the polymerization of one or more olefins comprising a first step of polymerizing one or more of said olefins in the presence of a catalyst of the Ziegler-Natta type, a step wherein the polymer obtained in the first step is contacted with a c... | 04/29/2008 |
| 7365136 | High melt strength polypropylene The present invention concerns a high melt strength propylene polymer or copolymer suitable for manufacturing foams and thermoformed product exhibiting a melt strength of at least 3 g and comprising a high molar mass portion and a low or medium molar mass portion. T... | 04/29/2008 |
| 7361621 | Magnesium halide/alcohol adduct, its preparation and use The present invention provides a process for preparing particles of magnesium halide/alcohol adduct, said process comprising: preparing a melt of magnesium halide/alcohol adduct in an inert liquid medium, dispersing the mixture of the inert liquid medium and the mel... | 04/22/2008 |
| 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 |
| 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 |
| 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 |
| 7332556 | Crystalline polymers of propylene having improved processability in the molten state and process for their preparation Crystalline polymers and copolymers of propylene having total MIL values>2 g/10 minutes, total [η] values in tetrahydronaphthalene at 135° C.≦2.8 dl/g, mW/MN values>20, a fraction insoluble in xylene at 25° C.≧94, and including from 10 to 60% by weight of a f... | 02/19/2008 |
