Entries |
Document | Title | Date |
20080281059 | Magnesium Compound, Catalyst for Olefin Polymerization and Method for Producing Olefin Polymer - A magnesium compound represented by the formula (I): | 11-13-2008 |
20080306228 | 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 component (I) which contains titanium, magnesium, halogen, and a cyclic ester compound (a) specified by the following formula (1): | 12-11-2008 |
20090099324 | Magnesium dichloride-ethanol adducts and catalyst components obtained therefrom | 04-16-2009 |
20090171042 | Catalyst Particles - The present invention relates to novel and unique catalyst particles, a method for preparing same, the use of the catalyst particles for polymerization reactions and methods of controlling the catalyst particle morphology. | 07-02-2009 |
20090203857 | MAGNESIUM COMPOUND, SOLID CATALYST COMPONENT, ETHYLENE POLYMERIZATION CATALYST, AND PROCESS FOR PRODUCING ETHYLENE POLYMER - A magnesium compound obtainable by reacting metal magnesium, ethanol, an alcohol having from 3 to 10 carbon atoms and a halogen and/or a halogen-containing compound containing at least 0.0001 gram atom of a halogen atom relative to one gram atom of the metal magnesium at 0 to 70° C., which comprises composition represented by the formula (I), and which has a particle diameter D | 08-13-2009 |
20090221771 | 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) preparing a magnesium compound solution by contacting a halogenated magnesium compound and an alcohol for allowing a reaction; (ii) reacting the resulted magnesium compound solution with an ester compound having at least one hydroxyl group and a silicon compound having at least one alkoxy group; (iii) reacting the resulted solution with a mixture of a titanium compound and a silicon compound to obtain a solid titanium catalyst component; (iv) washing the resulted solid titanium catalyst component with a halogenated saturated hydrocarbon compound; and (v) further reacting the washed solid titanium catalyst component with a titanium compound to obtain a solid complex titanium catalyst, and (b) an organometallic compound from Group II or III of Periodic table of elements. According to the present invention, it is possible to provide a process for polymerization or copolymerization of ethylene in which the catalyst activity is improved and a polymer of high bulk density is provided, with the use of a catalyst prepared by a simple process. | 09-03-2009 |
20090240009 | Magnesium methoxide based catalyst precusors and catalyst components obtained therefrom - Catalyst precursors comprising Mg, Ti, OMe and OR groups that are in molar ratios defined by the formula MgTi | 09-24-2009 |
20090318643 | Catalyst Component for Ethylene Polymerization, Preparation Thereof and Catalyst Comprising the Same - The present invention relates to a catalyst component for ethylene polymerization, which comprises a reaction product of a magnesium complex, at least one titanium compound, at least one alcohol compound, at least one silicon compound, and optionally an organic aluminum compound. The silicon compound is an organic silicon compound having a general formula R | 12-24-2009 |
20100069586 | HIGH ACTIVITY ZIEGLER-NATTA CATALYSTS, PROCESS FOR PRODUCING CATALYSTS AND USE THEREOF - Improved Ziegler-Natta catalysts and methods of making the improved catalyst are described. The Ziegler-Natta catalyst is formed using a spherical MgCl | 03-18-2010 |
20100093955 | PHOTOREACTIVE POLYMER AND METHOD FOR PREPARING THE SAME - The present invention relates to a photoreactive polymer that comprises a multi-cyclic compound in a main chain, and a polymerization method thereof. Since the photoreactive polymer according to the present invention comprises a multi-cyclic compound having a high glass transition temperature as a main chain, the thermal stability is excellent, and since the mobility of the main chain is relatively high as compared to that of an additional polymer, a photoreactive group can be freely moved in the main chain of the polymer. Accordingly, it is possible to overcome a slow photoreactive rate that is considered a disadvantage of a polymer material used to prepare an alignment film for known liquid crystal display devices. | 04-15-2010 |
20100121010 | CATALYST SYSTEM FOR POLYPROPYLENE COPOLYMERS - Catalyst system comprising (a) a procatalyst composition comprising (i) a transition metal compound of Group 4 to 6 of the Periodic table (IUPAC, Nomenclature of Inorganic Chemistry, 1989), (i) M | 05-13-2010 |
20100168350 | Catalyst Components for the Polymerization of Olefins - The present invention relates to catalysts component for the polymerization of ethylene and its mixtures with olefins CH | 07-01-2010 |
20100184930 | OLEFIN POLYMERIZATION CATALYST AND PREPARATION METHOD AND USE THEREOF - An olefin polymerization catalyst and preparation method and use thereof are provided. The catalyst component comprises (1) an active magnesium halide, (2) a titanium compound containing at least one Ti-halide bond supported thereon, and (3) an electron donor selected from the group consisting of one or more sulfonyl-containing compounds having the following formula. There are two methods for preparing such solid catalyst component: I) treating the active magnesium halide (1) particles with alkylaluminum, subsequently adding the electron donor (3), treating it with the solution of titanium compound (2) one or more times; II) adding spherical magnesium chloride alcoholate particles to the solution of titanium compound (2), subsequently adding the electron donor (3), treating it with the solution of titanium compound (2) one or more times. The catalyst system comprises such solid catalyst component, a co-catalyst (alkylaluminum compound) and an external electron donor. | 07-22-2010 |
20100216955 | METHOD OF PRODUCING HIGHLY TRANSPARENT POLYPROPYLENE INCLUDING PREPOLYMERIZATION STEP - Disclosed is a method of preparing a highly transparent polypropylene comprising a step of prepolymerizing an α-olefin and a vinyl cyclic saturated hydrocarbon in the presence of a Zegler-Natta catalyst and an external electron donor, wherein a step of adding and prepolymerizing the α-olefin is followed by a step of adding and prepolymerizing the vinyl cyclic saturated hydrocarbon. The method provides polypropylene having superior tacticity and transparency with not decreasing the activity of the polymerization catalyst at the polymerization of propylene. | 08-26-2010 |
20100222528 | CATALYST FOR THE POLYMERIZATION OF OLEFINS - The present invention relates to catalysts for the polymerization of olefins, in particular ethylene and its mixtures with olefins CH | 09-02-2010 |
20100234543 | PROCESS FOR POLYMERISING ETHYLENE - The present invention relates to a process for polymerisation of ethylene, in particular a process which comprises using a catalyst system comprising comprising a catalyst system comprising: i) a solid catalyst comprising Ti, Mg and halogen, ii) a first activator which is at least one trialkylaluminium compound of the formula AIR | 09-16-2010 |
20100240846 | Catalyst component for the polymerization of olefins based on 1,3-diethers - Catalyst components for the polymerization of olefins comprising Mg, Ti, halogen and 1,3-diethers as internal donors having an improved balance of properties in terms of activity and morphological stability are obtained by a process comprising: (A) A first step comprising reacting an adduct of formula MgCl | 09-23-2010 |
20100292419 | CATALYST COMPONENTS FOR THE POLYMERIZATION OF OLEFINS - Prepolymerized catalyst component for the polymerization of olefins CH | 11-18-2010 |
20100324239 | SOLID TITANIUM CATALYST COMPONENT, OLEFIN POLYMERIZATION CATALYST, AND PROCESS FOR PRODUCING OLEFIN POLYMER - The present invention provides a process for producing an α-olefin polymer comprising polymerizing or copolymerizing (a) C | 12-23-2010 |
20110034648 | SOLID TITANIUM CATALYST COMPONENT FOR ETHYLENE POLYMERIZATION, ETHYLENE POLYMERIZATION CATALYST AND ETHYLENE POLYMERIZATION METHOD - Provided are a solid titanium catalyst component for ethylene polymerization which can polymerize ethylene at a high activity and which can provide an ethylene polymer having an excellent particle property, an ethylene polymerization catalyst and an ethylene polymerization method in which the catalyst is used. | 02-10-2011 |
20110046325 | CATALYST COMPONENT FOR ETHYLENE POLYMERIZATION, PREPARATION THEREOF, AND A CATALYST COMPRISING THE CATALYST COMPONENT - A catalyst component for ethylene polymerization, comprising an organic silicon compound of the formula (I), below wherein R | 02-24-2011 |
20110054129 | SPHEROIDAL PARTICLES FOR OLEFIN POLYMERIZATION CATALYST - The invention relates to a process for the synthesis of spheroidal magnesium alkoxide having improved mechanical strength and narrow particle size distribution, the process comprising reacting magnesium metal, in the presence of iodine, with a mixture of alcohols by step-wise heating first in the range of 40° C. to 65° C. for a period of 2 hours and then in the range of 65° C. to 80° C. for a period of 1 hour, further by maintaining reaction temperature at 80° C. for a period of 6-10 hours, the vapours of the mixture produced during the reaction being condensed in an overhead condenser, hydrogen gas produced during the reaction being vented off and the mixture of alcohols left after the reaction being filtered and reused. The invention also relates to spheroidal magnesium alkoxide particles synthesized by the method, to the Ziegler natta procatalyst synthesized by using the alkoxide and to the polymer resin synthesised using the procatalyst. | 03-03-2011 |
20110065873 | POLYPROPYLENE COMPOSITION WITH IMPROVED OPTICS FOR FILM AND MOULDING APPLICATIONS - The present invention relates to a polypropylene composition comprising a propylene homopolymer or a propylene random copolymer having at least one comonomer selected from alpha-olefins with 2 or 4-8 carbon atoms and a comonomer content of not more than 8.0 wt %, wherein the propylene homo- or copolymer is polymerized in the presence of a Ziegler-Natta catalyst, and the polypropylene composition has a MWD of 2.0 to 6.0 and an MFR (2.16 kg/230° C.) of 4.0 g/10 min to 20.0 g/10 min, characterized in that the polypropylene composition has not been subjected to a vis-breaking step, the use of the inventive polypropylene composition for the production of a film and/or injection molded articles, a process for preparing a film wherein the inventive polypropylene composition is formed into a film, and wherein the polypropylene composition has not been subjected to a vis-breaking step and a film comprising the inventive polypropylene composition. | 03-17-2011 |
20110077367 | CATALYST SYSTEM FOR THE POLYMERIZATION OF OLEFINS - A catalyst system for the polymerization of olefins comprising (A) a catalyst component obtained by reacting a Mg(OR | 03-31-2011 |
20110098423 | Propylene-ethylene copolymers and process for their preparation - Random propylene/ethylene copolymers are provided characterized by
| 04-28-2011 |
20110130529 | THREE AND FOUR ATOM BRIDGED DICARBONATE COMPOUNDS AS INTERNAL DONORS IN CATALYSTS FOR POLYPROPYLENE MANUFACTURE - A solid, hydrocarbon-insoluble, catalyst component useful in polymerizing olefins, said catalyst component containing magnesium, titanium, and halogen, and further containing an internal electron donor having a structure: | 06-02-2011 |
20110152481 | Internal and external donor compounds for olefin polymerization catalysts - The present invention relates to catalyst systems containing solid catalyst components comprising titanium, magnesium, halogen and a 1,8-naphthyl diaryloate internal electron donor compound; organoaluminum compounds and alkyl benzoate derivatives as external electron donors. The present invention also relates to methods of making the catalyst systems, and methods of polymerizing or copolymerizing alpha-olefins using the catalyst systems. | 06-23-2011 |
20110207900 | CATALYST FOR HOMOPOLYMERIZING AND COPOLYMERIZING PROPYLENE AND ITS PREPARATION AND USE - A catalyst for homopolymerizing and copolymerizing propylene and its preparation and use. The catalyst component includes titanium compound containing at least one Ti-halogen bond and at least two kinds of electron donor compounds A and B supported on MgCl | 08-25-2011 |
20110251361 | METHOD OF MAKING ZIEGLER-NATTA TYPE CATALYSTS - A process for making a Ziegler-Natta-type catalyst precursor including contacting a Group 4 metal compound with one or more Titanium compounds selected from the group of TiCl | 10-13-2011 |
20110269924 | SOLID TITANIUM CATALYST COMPONENT FOR ETHYLENE POLYMERIZATION, ETHYLENE POLYMERIZATION CATALYST AND ETHYLENE POLYMERIZATION METHOD - Provided are a solid titanium catalyst component for ethylene polymerization which can polymerize ethylene at a high activity and which can provide an ethylene polymer having an excellent particle property, an ethylene polymerization catalyst and an ethylene polymerization method in which the catalyst is used. | 11-03-2011 |
20110282013 | Process for Feeding a Catalyst in a Polymerization Reactor - A process for introducing a catalyst powder based on a titanium compound supported on magnesium halide into a gas-phase olefin polymerization reactor, characterized in that it comprises:
| 11-17-2011 |
20120004378 | SOLID CATALYST COMPONENT AND CATALYST FOR POLYMERIZATION OF OLEFINS, AND PROCESS FOR PRODUCTION OF OLEFIN POLYMERS USING SAME - A solid catalyst component for olefin polymerization is produced by causing (a) a solid component that includes magnesium, titanium, a halogen, and an electron donor, (b) an aminosilane compound shown by the following general formula (1), and (c) at least one organosilicon compound selected from an organosilicon compound shown by the following general formula (2-A) and an organosilicon compound shown by the following general formula (2-B) to come in contact with each other. A polymer having high stereoregularity is produced in high yield while achieving a high melt flow rate due to hydrogen by polymerizing an olefin in the presence of a catalyst that includes the solid catalyst component. | 01-05-2012 |
20120035338 | CATALYST COMPONENT USED FOR OLEFIN POLYMERIZATION, PROCESS FOR PREPARING THE SAME, AND CATALYST CONTAINING THE SAME - A process for preparing a solid particle-type catalyst component used for olefin polymerization which contains magnesium, titanium, a halogen and an electron donor as essential ingredients, a catalyst component obtained by said process, and a catalyst containing the catalyst component are disclosed. | 02-09-2012 |
20120077944 | Catalyst Components for the Polymerization of Olefins and Catalysts Therefrom Obtained - Catalyst components for the polymerization of olefins CH | 03-29-2012 |
20120116031 | High Activity Catalyst Component for Olefin Polymerization and Method of Using the Same - A catalyst system containing (a) a solid catalyst component containing a titanium halide, a magnesium halide, a first internal electron donor compound, and a second internal electron donor compound, (b) an organoaluminum compound, and (c) an external electron donor compound is disclosed. The first internal electron donor compound contains at least one ether group and at least one ketone group. The second internal electron donor compound is a 1,8-naphthyl diester compound. Methods of polymerizing or copolymerizing alpha-olefins using the catalyst system also are disclosed. | 05-10-2012 |
20120130031 | PROCESS FOR THE PREPARATION OF ETHYLENE POLYMERS WITH NARROW MOLECULAR WEIGHT DISTRIBUTION - Process for the preparation of ethylene polymers having narrow MWD characterized by a F/E ratio lower than 35 carried out in the presence of a catalyst system comprising (a) a solid catalyst component comprising Ti atoms that are substantially in the +4 oxidation state, Mg, Cl, and optionally OR groups and internal donors in which R is a C1-C20 hydrocarbon group, in which the OR/Ti molar ratio is equal to or lower than 0.35 and the internal donor/Ti ratio is lower than 1, (b) an aluminum alkyl compound and (c) a compound selected from alkoxybenzenes of specified formula. | 05-24-2012 |
20120149858 | Controlled Distribution of Active Sites in Ziegler-Natta Catalyst Systems - The present invention provides a method for improving and controlling the activity of Ziegler-Natta catalyst systems. | 06-14-2012 |
20120165483 | Magnesium dichloride-alcohol adducts and catalyst components obtained therefrom - Solid adducts comprising a MgCl | 06-28-2012 |
20120178888 | 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 internal void volume substantially or fully enclosed by a monolithic surface layer (shell), said layer being characterized by an average shell thickness/particle size ratio (Thickness Ratio) determined by SEM techniques for particles having particle size greater than 30 μm of greater than 0.2. | 07-12-2012 |
20120190805 | SOLID CATALYST COMPONENT FOR POLYMERIZATION AND COPOLYMERIZATION OF ETHYLENE AND PROCESS FOR OBTAINING THE SAME - Disclosed is a process for obtaining a solid catalyst component for ethylene polymerization and copolymerization, wherein a carrier of particulate silica (65 to 85% by weight) is impregnated with a catalytically active portion (15 to 35% by weight) including titanium, magnesium, chlorine, alkoxy groups and at least one organometallic compound of the groups 1, 2, 12 or 13 of the periodic table. Further, the invention refers to the solid catalyst component thus obtained and to a process for ethylene polymerization and copolymerization wherein is used said catalyst. The catalyst obtained is suitable for the production of ethylene homo- and copolymers as narrow molecular weight distribution high density polyethylene (NMWHDPE) and linear low density polyethylene (LLDPE) with controlled morphology and improved structure. | 07-26-2012 |
20120214955 | SUPPORTED NONMETALLOCENE CATALYST, PREPARATION AND USE THEREOF - This invention relates to a supported nonmetallocene catalyst and preparation thereof. The supported nonmetallocene catalyst can be produced with a simple and feasible process and is characterized by an easily controllable polymerization activity. This invention further relates to use of the supported nonmetallocene catalyst in olefin homopolymerization/copolymerization, which is characterized by a lowered assumption of the co-catalyst as compared with the prior art. | 08-23-2012 |
20120226004 | CATALYST COMPONENT FOR OLEFIN POLYMERIZATION AND PREPARATION METHOD THEREOF - A catalyst component for olefin polymerization is disclosed, which comprises at least one diol ester type electron donor compound (a) and at least one diether type electron donor compound (b) among others, wherein the molar ratio of a to b is 0.55-50. A preparation method of the catalyst component, a catalyst comprising the catalyst component, and an olefin polymerization method using the catalyst which can especially be used for preparation of polypropylenes of low ash contents are also disclosed. | 09-06-2012 |
20120259078 | CATALYST COMPONENTS FOR THE POLYMERIZATION OF OLEFINS AND CATALYSTS THEREFROM OBTAINED - Catalyst component comprising Mg, Ti, and halogen atoms, and is characterized in that (a) the Ti atoms are present in an amount higher than 4% based on the total weight of the said catalyst component, (b) the amount of Mg and Ti atoms is such that the Mg/Ti molar ratio is higher than 2 and (c) by a X-ray diffraction spectrum, in which, in the range of 2θ diffraction angles between 47° and 52°, at least two diffraction lines are present at diffraction angles 2θ of 48.3±0.2°, and 50.0±0.2°, the most intense diffraction lines being the one at 2θ of 50.0±0.2°, the intensity of the other diffraction line being equal to or lower than the intensity of the most intense diffraction line. | 10-11-2012 |
20120271015 | Bimetallic Catalyst, Method of Polymerization and Bimodal Polyolefins Therefrom - Bimetallic catalysts, methods of producing bimetallic catalysts comprising a modified Ziegler-Natta catalyst and a metallocene, and methods of olefin polymerization using such catalysts are provided. The method of producing the bimetallic catalyst may include combining (a) a Ziegler-Natta catalyst comprising a Group 4, 5 or 6 metal halide and/or oxide, optionally including a magnesium compound, with (b) a modifier compound (“modifier”), wherein the modifier compound is a Group 13 alkyl compound, to form a modified Ziegler-Natta catalyst. The modified Ziegler-Natta catalyst is preferably non-activated, that is, it is unreactive towards olefin polymerization alone. The molar ratio of the Group 13 metal (of the modifier) to the Group 4, 5 or 6 metal halide and/or oxide may be less than 10:1. The bimetallic catalysts are useful in producing bimodal polymers, particularly bimodal polyethylene, having a Polydispersity (Mw/Mn) of from 12 to 50, which may be used in pipes and films. | 10-25-2012 |
20120289669 | PREPARATION METHOD OF SOLID CATALYST FOR POLYMERIZATION OF POLYPROPYLENE AND SOLID CATALYST USING THE SAME - Disclosed is a method for preparing a solid catalyst for polymerization of polypropylene. The method includes: a) reacting a magnesium halide compound with alcohol and then adding a phthalic acid compound thereto to prepare a magnesium compound solution; b) mixing an aliphatic or alicyclic hydrocarbon solvent with an aromatic hydrocarbon solvent to prepare a mixed solvent, dispersing a titanium compound in the mixed solvent, and then reacting the titanium compound dispersed with the magnesium compound solution prepared in step a), and heating to produce a support; and c) reacting the support with the titanium used before disperse in step b) compound and an electron donor to obtain a solid product. When a catalyst prepared by the present disclosure is used, polypropylene with high activity and high bulk density characteristics may be prepared. | 11-15-2012 |
20120296056 | CATALYST FOR POLYMERIZATION OF POLYOLEFIN AND PREPARATION METHOD THEREOF - The present disclosure relates to a method for preparing a catalyst for polymerization of polyolefin and a catalyst for polymerization of polyolefin by using the same, and particularly, to a method for preparing a catalyst for polymerization of polyolefin, including: reacting a magnesium halide precursor solution obtained by dissolving magnesium halide in a first alcohol and a first hydrocarbon and a dialkoxy magnesium support obtained by reacting a halogen compound and a second alcohol with metal magnesium, with titanium tetrachloride and an internal electron donor in the presence of a second hydrocarbon. The present disclosure may provide a catalyst for polymerization of two-component magnesium compound supported polyolefin showing high activity by using the above-described dialkoxy magnesium supported catalyst. | 11-22-2012 |
20120302708 | MAGNESIUM HALIDE ADDUCTS, CATALYST COMPONENTS AND CATALYSTS COMPRISING THE SAME, AND PREPARATION PROCESSES THEREOF - A magnesium halide adduct is provided, comprising at least one compound of the formula MgXY, at least one compound of the formula ROH, methanol, at least one modifying agent chosen from DOE and o-hydroxy benzoates, and optionally water. Also provided herein are a catalyst component comprising the magnesium halide adduct, a catalyst for olefin polymerization comprising the catalyst component; the respective processes for preparing the magnesium halide adduct and the catalyst component; use of the magnesium halide adduct for preparing the catalyst component, use of the catalyst component in a catalyst for olefin polymerization and use of the catalyst in olefin polymerization; and a process of olefin polymerization. | 11-29-2012 |
20120316299 | Amide Ester Internal Electron Donor and Process - Disclosed is a process for producing a procatalyst composition having an amide ester internal electron donor. The process includes pre-halogenating a procatalyst precursor before reaction with the amide ester and forming the procatalyst composition. Ziegler-Natta catalyst compositions containing the present procatalyst composition exhibit improved catalyst activity and/or improved catalyst selectivity and produce propylene-based olefins with broad molecular weight distribution. | 12-13-2012 |
20120322962 | Procatalyst Composition with Substituted Amide Ester Internal Electron Donor - Disclosed are procatalyst compositions having an internal electron donor which includes a substituted amide ester and optionally an electron donor component. Ziegler-Natta catalyst compositions containing the present procatalyst compositions exhibit improved catalyst activity and/or improved catalyst selectivity and produce propylene-based olefins with broad molecular weight distribution. | 12-20-2012 |
20130012672 | CATALYST FOR HIGH TEMPERATURE OLEFIN POLYMERIZATION - An olefin polymerization catalyst is prepared by (a) in a diluent, combining a diorganomagnesium compound with less than 2 molar equivalents of a first source of chloride to produce a “chloride deficient” magnesium chloride support; (b) without isolating any solids, adding a second source of chloride which reduces the amount of soluble un-reacted diorganomagnesium compound present; (c) without isolating any solids present, adding a tetravalent titanium species and; (d) adding an activator. The catalyst is active for solution polymerization of olefins. | 01-10-2013 |
20130041120 | CATALYST COMPONENT FOR OLEFIN POLYMERIZATION REACTION AND CATALYST COMPRISING SAME - A catalyst component for olefin polymerization comprising magnesium, titanium, halogen and electron donor, wherein the electron donor is selected from at least one of the diol diester compounds, when the diol diester comprised contains a certain amount of isomer with Fischer projection formula as shown in Formula (II), the activity and stereospecificity of the catalyst are greatly improved, especially in the production of polymers with high melt index, the isotactic index of the obtained polymers is improved substantially. | 02-14-2013 |
20130072647 | OLEFIN POLYMERIZATION CATALYST AND PREPARATION METHOD AND USE THEREOF - An olefin polymerization catalyst and preparation method and use thereof are provided. The components of the catalyst comprise an active magnesium halide, a titanium compound containing at least one Ti-halide bond loaded on the active magnesium halide, and an internal electron donor selected from one or more silicon esters compounds having formula (I). The method for preparing the catalyst components is that: adding spherical magnesium chloride alcoholate particles and the electron donor into the solution of titanium compound in sequence, and processing with the titanium compound for one or more times to obtain the catalyst. The catalyst system used for the olefin polymerization comprises the catalyst components, a cocatalyst and an external electron donor. The catalyst has high activity for the propylene polymerization, and the activity is 4399 gPP/gTi·h(50° C., 1 h, slurry polymerization at atmospheric pressure), and the isotacticity of the polymer is 98%. | 03-21-2013 |
20130102744 | Catalyst Systems for the Polymerization of Olefins - A catalyst system comprising the product obtained by contacting (a) a solid catalyst component containing Mg, Ti, halogen and at least an electron donor compound selected from 1,3-diethers;
| 04-25-2013 |
20130190464 | PROCESS FOR PRODUCING SOLID CATALYST COMPONENT FOR OLEFIN POLYMERIZATION - The present invention relates to a process for producing a solid catalyst component (A) for olefin polymerization, the process comprising the steps of:
| 07-25-2013 |
20130190465 | ETHYLENE/ALPHA-OLEFIN INTERPOLYMER SUITABLE FOR USE IN FIBER APPLICATIONS, AND FIBERS MADE THEREFROM - The instant invention provides an ethylene/alpha-olefin interpolymer suitable for use in fiber applications, and fibers made therefrom. The ethylene/alpha-olefin interpolymer according to the present invention has a CDBI of less than 60%, and comprises at least two fractions in crossfractionation of the ethylene/alpha-olefin interpolymer, eluting from 85° C. to 90° C. and from 90° C. to 95° C., comprising a weight fraction ratio of >0.68 and a molecular weight homogeneity index of greater than 0.65; wherein the weight fraction ratio is the ratio of the weight of polymer in each fraction divided by the weight of polymer eluting between 95° C. and 100° C. and the molecular weight homogeneity index is the ratio of the weight average molecular weight of the polymer in the fraction divided by the weight average molecular weight of the polymer eluting between 95° C. and 100° C., and wherein the ethylene/alpha-olefin interpolymer has a density in the range of from 0.920 to 0.965 g/cm | 07-25-2013 |
20130190466 | POLYETHYLENE EXTRUDED ARTICLES - Extruded articles, particularly films, comprising an ethylene polymer obtained by a polymerization process carried out in the presence the products obtained by contacting the following components: (a) a solid catalyst component comprising a magnesium halide, a titanium compound having at least a Ti-halogen bond and optionally one or more internal electron donor compounds, (b) an aluminum hydrocarbyl compound, (c) optionally an external electron donor compound, and (d) a polyalcohol partially esterified with carboxylic acids with alkyl groups having at least 10 carbon atoms. | 07-25-2013 |
20130197171 | METHOD FOR FEEDING AN ANTISTATIC COMPOUND TO A POLYMERIZATION REACTOR - A method for feeding an antistatic compound to a polymerization reactor comprising the steps of: a) dispersing, under mixing conditions, a catalyst powder and an antistatic compound in an oil, so as to form a suspension of catalyst powder and antistatic compound in said oil; b) successively adding, under mixing conditions, a molten thickening agent to said suspension from step a), while maintaining said suspension at a temperature such that said thickening agent solidifies on contact with said suspension; c) transferring the product obtained from b) to a polymerization reactor. | 08-01-2013 |
20130197172 | MAGNESIUM DICHLORIDE-ALCOHOL ADDUCTS AND CATALYST COMPONENTS OBTAINED THEREFROM - Adducts comprising a MgCl | 08-01-2013 |
20130197173 | CATALYST SYSTEM FOR THE POLYMERIZATION OF OLEFINS - A catalyst system comprising the product obtained by contacting (a) a solid catalyst component containing Mg, Ti, halogen and at least an electron donor compound selected from diolesters of a specific formula (b) an alkylaluminum cocatalyst and (c) an ester of formula R′OOC—(CR″ | 08-01-2013 |
20130211021 | METHOD FOR PREPARING POLYPROPYLENE USING TRANSITION METAL COMPOUND CONTAINING THIOPHENE-FUSED CYCLOPENTADIENYL LIGAND - The present invention relates to a preparation method for polypropylene that comprises polymerizing a propylene monomer in the presence of a catalyst comprising a novel transition metal compound. Using the novel transition metal compound as a catalyst, the preparation method for polypropylene according to the present invention can not only acquire high catalytic activity for polymerization to achieve high efficiency of the process but allow it to easily control the fine-structure characteristics of the polymer, thereby providing polypropylene having desired properties with ease. | 08-15-2013 |
20130217844 | PROCESS FOR THE POLYMERIZATION OF OLEFINS - A process for the (co)polymerization of propylene carried out at a temperature ranging from 77 to 95° C. in the presence of a catalyst comprising the product obtained by reacting: —an organo-aluminium compound, with—-a solid catalyst component comprising Mg, Ti and electron donor compound selected from specific diolesters. | 08-22-2013 |
20130245211 | ORGANIC SEMICONDUCTOR MATERIALS, PREPARATION METHODS AND APPLICATIONS THEREOF - Disclosed are organic semiconductor material having the general formula (I), Wherein R | 09-19-2013 |
20130253151 | ORGANIC SEMICONDUCTOR MATERIAL, PREPARATION METHODS AND USES THEREOF - Disclosed are organic semiconductor material, preparation methods and uses thereof. The organic semiconductor material is shown as the following formula (P), in which R | 09-26-2013 |
20130274426 | DENTAL CURABLE COMPOSITION - The present invention provides a dental curable composition which has excellent curability and which cures into a cured product that is less susceptible to discoloration by hydrogen sulfide in an oral environment. The present invention is a dental curable composition containing: a polymerizable monomer (a) having an acidic group, as a polymerizable monomer component; and a copper compound (b) and a benzotriazole compound (c) represented by the following general formula (1) and/or a benzimidazole compound (c) represented by the following general formula (2), as polymerization initiator components (symbols used in the formulae are as described in the description). | 10-17-2013 |
20130274427 | PROCESS FOR CONTROLLING THE RELATIVE ACTIVITY OF ACTIVE CENTERS OF CATALYST SYSTEMS COMPRISING AT LEAST ONE LATE TRANSITION METAL CATALYST COMPONENT AND AT LEAST ONE ZIEGLER CATALYST COMPONENT - A method of controlling the polymer composition of an ethylene copolymer in a process for preparing ethylene copolymers by copolymerizing ethylene and at least one other olefin in the presence of a polymerization catalyst system comprising at least one late transition metal catalyst component (A) having a tridentate ligand which bears at least two ortho, ortho′-disubstituted aryl radicals, at least one Ziegler catalyst component (B), and at least one activating compound (C) by varying the polymerization temperature, a process for copolymerizing ethylene and at least one other olefin in the presence of such a polymerization catalyst system comprising utilizing the controlling method, a method for altering the polymer composition of an ethylene copolymer obtained by copolymerizing ethylene and at least one other olefin in the presence of such a polymerization catalyst system by varying the polymerization temperature and a method for transitioning from one ethylene copolymer grade to another by using the method for altering the polymer composition. | 10-17-2013 |
20130331529 | METHOD FOR ADJUSTING THE AVERAGE PARTICLE SIZE OF A SPHERICAL CATALYST SUPPORT - A method for adjusting the average particle size of a spherical catalyst support, in particular a spherical catalyst support comprising a magnesium dihalide-ethanol-adduct, a spherical catalyst support obtained by the method, a solid catalyst composition comprising the spherical catalyst support, and the use of the solid catalyst composition for the polymerization of an olefins. | 12-12-2013 |
20140163185 | CATALYST COMPONENT FOR OLEFIN POLYMERIZATION, PREPARATION METHOD THEREFOR AND CATALYST THEREOF - A catalyst component (A) for olefin polymerization is prepared by contacting a solid component (a) containing magnesium, titanium, halogen and an internal electron donor compound with an organosilicon compound (b), wherein the organosilicon compound (b) is one or more selected from a Si—H functional group containing chainlike polysiloxane (b1) represented by formula (I | 06-12-2014 |
20140249282 | PROCESS FOR THE PREPARATION OF A COPOLYMER OF ETHYLENE - A process for the preparation of an elastomeric polymer of ethylene which comprises polymerizing, in suspension, a mixture of monomers comprising ethylene, at least one a-olefin having from 3 to 12 carbon atoms, possibly at least one non-conjugated diene having from 4 to 20 carbon atoms, in the presence of a catalytic system comprising:—a suspension in oil of at least one catalyst selected from compounds containing vanadium;—-at least one co-catalyst, as such, selected from compounds containing aluminium; at least one activator, as such, selected from compounds containing chlorine. | 09-04-2014 |
20140256892 | Olefin Olegomerization Process - An olefin oligomerization process comprises contacting an olefin feed with a catalyst composition. The catalyst composition includes a crystalline aluminosilicate having FAU, EMT or a combination of FAU and EMT framework type. The crystalline aluminosilicate has cobalt and at least one alkaline earth metal selected from calcium, barium, strontium and mixtures thereof within its intra-crystalline cages. | 09-11-2014 |
20140343237 | SOLID CATALYST COMPONENT FOR POLYMERIZATION OF OLEFIN, CATALYST FOR POLYMERIZATION OF OLEFIN, AND METHOD FOR PRODUCING OLEFIN POLYMER - A solid catalyst component for olefin polymerization includes titanium, magnesium, a halogen, and a compound represented by the following formula (1): R | 11-20-2014 |
20140357815 | HIGH PERFORMANCE ZIEGLER-NATTA CATALYST SYSTEMS, PROCESSES FOR PRODUCING SUCH CATALYST SYSTEMS, AND USE THEREOF - A catalyst system for the polymerization of olefins may include a first solid catalytic component and a second solid catalytic component. The first solid catalytic component may include: a spherical MgCl | 12-04-2014 |
20140357816 | PROPYLENE RANDOM COPOLYMER - Propylene random copolymers with low randomness and being free of from catalyst originating phthalates. | 12-04-2014 |
20140378630 | Bulk Polymerization Process For Producing Polydienes - A process for preparing a polydiene, the process comprising the steps of: polymerizing conjugated diene monomer with a metallocene complex catalyst system within a polymerization mixture that includes less than 20% by weight of solvent based on the total weight of the polymerization mixture, where the metallocene complex catalyst system includes the combination or reaction product of: (a) metallocene complex, (b) an alkylating agent, and optionally (c) a non-coordinating anion. | 12-25-2014 |
20150011719 | Methods for Making Catalyst Compositions and Polymer Products Produced Therefrom - Methods for making olefin polymerization catalysts and methods for making polymers using the catalysts are provided. The method for making the catalyst can include combining one or more supports with one or more magnesium-containing compounds under reaction conditions to form a first reacted product. One or more chlorinating compounds selected from the group consisting of aluminum alkyl chlorides and chloro substituted silanes can be combined with the first reacted product under reaction conditions to form a second reacted product. One or more titanium-containing compounds selected from the group consisting of titanium alkoxides and titanium halides can be combined with the second reacted product under reaction conditions to form a catalyst. | 01-08-2015 |
20150073107 | ANSA-METALLOCENE COMPOUND AND METHOD FOR PREPARING SUPPORTED CATALYST USING THE SAME - This disclosure relates to an ansa-metallocene compound of a novel structure that can provide various selectivities and activities to polyolefin copolymers, a preparation method thereof, and a method for preparing polyolefins using the ansa-metallocene compound. | 03-12-2015 |
20150299346 | PROCATALYST COMPOSITION WITH SUBSTITUTED 1,2-PHENYLENE AROMATIC DIESTER INTERNAL DONOR AND METHOD - Disclosed are procatalyst compositions having an internal electron donor which include a substituted phenylene aromatic diester and optionally an electron donor component. Ziegler-Natta catalyst compositions containing the present procatalyst compositions exhibit high activity and produce propylene-based olefins with broad molecular weight distribution. | 10-22-2015 |
20150344594 | MAGNESIUM DICHLORIDE-ALCOHOL ADDUCTS AND CATALYST COMPONENTS OBTAINED THERE-FROM - Spherical adducts comprising a MgCl | 12-03-2015 |
20160075802 | PREPARATION METHOD OF CATALYST FOR POLYMERIZATION OF POLYOLEFIN AND PROCESS FOR POLYMERIZATION OF POLYOLEFIN USING THE SAME - This disclosure relates to a method for preparing a catalyst for synthesis of a polyolefin and a process for synthesis of a polyolefin using the same. More particularly, this disclosure relates to a method for preparing a catalyst for synthesis of a polyolefin including: reacting a magnesium compound with an alkane diol having a carbon number of 3 to 15 unsubstituted or substituted with an alkyl group having a carbon number of 1 to 5, and a benzoyl halide compound to prepare a magnesium compound solution; reacting the magnesium compound solution with a first transition metal compound to prepare a support; and reacting the support with a second transition metal compound to produce a solid catalyst, and a process for synthesis of a polyolefin using the same. | 03-17-2016 |
20160108169 | EFFICIENT SYNTHESIS OF RIGID LADDER POLYMERS - A molecule includes at least one moiety represented by: | 04-21-2016 |
20160115260 | Oxalic Acid Diamides As Modifiers For Polyolefin Catalysts - The present invention relates to the use of oxalic acid diamides as modifiers in conjunction with solid Ziegler-Natta type catalyst in processes in which polyolefins such as polypropylene are produced. The modified catalyst compositions produce polypropylene with good productivity and higher sterospecificity than systems without such modification. | 04-28-2016 |
20160152738 | Supported Catalyst for Olefin Polymerization, Preparation Method and Use Thereof | 06-02-2016 |
20160251457 | SPHERICAL CARRIERS FOR OLEFIN POLYMERIZATION CATALYST, CATALYST COMPONENTS, CATALYST, AND PREPARATION METHODS THEREFOR | 09-01-2016 |