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| Number | Title | Issue Date |
| 6770586 | Solid catalyst component and catalyst for olefins polymerization Solid catalyst components and catalysts which contain (a) magnesium compound, (b) titanium tetrachloride, and (c) a phthalic acid diester or its derivative are useful in the synthesis of olefin polymers in high yields. Particularly, propylene polymers can be obtain ... | 08/03/2004 |
| 6054542 | Ethylene polymer and process for preparing the same An ethylene polymer having small values of Mw/Mn and Mz/Mw, a small proportion of long-chain branches, a high melt tension and a high swell ratio and a process for preparing the same by polymerizing ethylene in the presence of an ethylene polymerization c... | 04/25/2000 |
| 5726261 | Components and catalysts for the polymerization of olefins The present invention relates to spherical solid components of catalysts for the polymerization of olefins comprising, supported on a magnesium dihalide in active form, a titanium compound containing at least one Ti-halogen bond and one OR group, said OR ... | 03/10/1998 |
| 5612427 | Catalyst for the polymerization of diolefins, method for its preparation, and its use for the preparation of polymers A supported solid catalyst which can be used for the polymerization and clymerization of conjugated dienes having as its basis the reaction product of: A) a solid MgCl2 support, B) an ether, preferably THF, as swelling agent for the support, C) a m... | 03/18/1997 |
| 5607655 | Olefin polymerization catalyst and precursor therefor A generally dipyramidal-shaped catalyst precursor is prepared by dissolving magnesium dichloride and a suitable alcohol in a suitable solvent and then cooling to obtain a precipitate of the desired shape. The use of the precursor to prepare catalysts and ... | 03/04/1997 |
| 5604172 | Shape-shifted magnesium alkoxide component for polymerizing olefins A process is provided for preparing a shape-shifted catalyst component comprising (1) contacting a dihydrocarbyloxide magnesium compound with carbon dioxide in the presence of a slurrying agent to form a slurry of a carboxylated dihydrocarbyloxide magnesi... | 02/18/1997 |
| 5597770 | Titanium-based catalyst composition for polymerizing ethylene A catalyst compound of the formula (I) is useful in the polymerization of ethylene into homopolymers or copolymers of high density and high melt flow ratio. The catalyst is prepared with a partial activation step before its complete activation with a co-c... | 01/28/1997 |
| 5594079 | Method for producing a polyolefin A method for producing a stereoregular polyolefin in the presence of a catalyst comprising a transition metal compound and an organometallic compound, which comprises polymerizing at least one olefin in the presence of a catalyst system comprising: (A) a ... | 01/14/1997 |
| 5567665 | Shape-shifted magnesium alkoxide component for polymerizing olefins A process is provided for preparing a shape-shifted catalyst component comprising (1) contacting a dihydrocarbyloxide magnesium compound with carbon dioxide in the presence of a slurrying agent to form a slurry of a carboxylated dihydrocarbyloxide magnesi... | 10/22/1996 |
| 5498676 | Process for olefin polymerization A high activity olefin polymerization catalyst catalyzes the production of polymeric lower -olefin having good properties. The catalyst is produced from an organoaluminum cocatalyst, a selectivity control agent and a novel olefin polymerization pro... | 03/12/1996 |
| 5432244 | Process for the production of polypropylene A process for the polymerization of propylene or a mixture comprising propylene and one or more alpha-olefins and, optionally, one or more diolefins comprising contacting the propylene or the mixture of olefins in at least one reaction zone, under polymer... | 07/11/1995 |
| 5411926 | Olefin polymerization catalyst A high activity olefin polymerization catalyst catalyzes the production of polymeric lower -olefin having good properties. The catalyst is produced from an organoaluminum cocatalyst, a selectivity control agent and a novel olefin polymerization pro... | 05/02/1995 |
| 5354820 | Process for the preparation of olefin polymer This invention relates to a process of producing an olefin polymer having stereoregularity by polymerizing an olefin in the presence of a catalyst obtained from (A) a solid catalyst component obtained by reacting a dialkoxymagnesium represented by the gen... | 10/11/1994 |
| 5344803 | Cocatalyst for transition metal-containing -olefin polymerization catalyst The present invention is directed to a novel halosilane cocatalyst component which, when used in conjunction with an aluminum containing cocatalyst, is effective in increasing the activity of a supported magnesium/titanium containing catalyst in the polym... | 09/06/1994 |
| 5300470 | Components and catalysts for the polymerization of ethylene Solid catalyst components for the preparation of catalysts capable of producing polymers and copolymers of ethylene with ultra high molecular weight are obtained in the form of particles having an average diameter of less than 10 micrometers, by way of re... | 04/05/1994 |
| 5247031 | Olefin polymerization catalyst component, process for production thereof, olefin polymerization catalyst, and process for polymerizing olefins A catalyst component (X") obtained by treating an olefin polymerization catalyst (X) formed from (A) a solid titanium catalyst component comprising magnesium, titanium, halogen and an electron donor as essential ingredients, (B) an organoaluminum compound... | 09/21/1993 |
| 5229344 | Olefin polymerization catalyst An improved high activity olefin polymerization catalyst catalyzes the production of polymeric lower -olefin having good properties and a relatively narrow particle size distribution. The catalyst is produced from an organoaluminum cocatalyst, a se... | 07/20/1993 |
| 5223466 | Olefin polymerization and copolymerization catalyst A process for making a magnesium-containing supported titanium-containing, alpha-olefin polymerization or co-polymerization catalyst or catalyst component having a large particle size, semi-spherical particle shape and high resistance to attrition.... | 06/29/1993 |
| 5212132 | Magnesium chloride particles with a polyhedral structure, catalytic components supported on these particles, resultant catalyst systems, processes for fabricating these products, and polyolefins obtained from these catalytic components Porous particles of MgCl2 having the form of essentially regular polyhedrons with six or eight faces in which the paired symmetrically opposite faces are essentially parallel, two of which faces are large and elongated and form the top face and... | 05/18/1993 |
| 5206314 | Polyolefin polymerization process, process of producing catalyst, and catalyst A polymerization catalyst useful for the polymerization of olefins is prepared by contacting a metal dihalide compound having a metal selected from Group 2 and Group 12 of the Periodic Table and a transition metal compound which is a hydrocarbyloxide of a... | 04/27/1993 |
| 5192729 | Highly active ziegler-natta catalyst for polymerizing HDPE and LLDPE and method for preparation thereof A highly active Ziegler-Natta catalyst for polymerizing HDPE and LLDPE at low temperature and pressure may be prepared by reacting a magnesium compound and a halogen compound with an electron donor compound to dissolve, reacting the resulting solution wit... | 03/09/1993 |
| 5185410 | Olefin polymerization catalyst An improved high activity olefin polymerization catalyst catalyzes the production of polymeric lower -olefin having good properties and a relatively narrow particle size distribution. The catalyst is produced from an organoaluminum cocatalyst, a se... | 02/09/1993 |
| 5182245 | Olefin polymerization and copolymerization catalyst A catalyst or catalyst component for the polymerization or copolymerization of alpha-olefins in the slurry phase is formed by a process comprising forming a solution of a magnesium-containing species in a liquid and precipitating solid particles from the ... | 01/26/1993 |
| 5151397 | Method of producing metal halide catalyst A polymerization catalyst is formed by combining a metal halide compound, a solvent, an effective amount of water to reduce fines and increase particle size, and a transition metal compound to form a first catalyst component and mixing the first catalyst ... | 09/29/1992 |
| 5139985 | Components and catalyst for the polymerization olefins Catalyst components for the polymerization of olefins comprising a titanium or vanadium compound supported on a porous particulate polymeric support which particles have a porosity greater than 0.3 cc/g and a pore distribution such that at least 40% of th... | 08/18/1992 |
| 5137995 | Process for preparation of olefin polymers A process for the preparation of olefin polymers, which comprises polymerizing an olefin in the presence of a catalyst which comprises: (A) a solid catalyst component obtained by contacting a magnesium dihalide such as MgCl2 with a titanium tet... | 08/11/1992 |
| 5124297 | Olefin polymerization and copolymerization catalyst A catalyst or catalyst component for the polymerization of copolymerization of alpha-olefins, which is formed by a process comprising forming a solution of a magnesium-containing species in a liquid comprising at least one alcohol.... | 06/23/1992 |
| 5112786 | Catalyst for polymerization of olefin monomers A catalyst for polymerization of olefin monomers, comprising Component (A) which is a solid catalytic compound obtained by subjecting at least the following three compounds to a contact reaction; Sub-component (i) which is a component for Ziegler catalyst... | 05/12/1992 |
| 5106927 | Process for producing ethylene/propylene/ethylidene norbornene rubbers A process for the production of EPDM comprising reacting ethylene, propylene, ethylidene norbornene, and hydrogen, in the gas phase, in a fluidized bed, under polymerization conditions, in the presence of a catalyst system comprising: (a) a titanium based... | 04/21/1992 |
| 5106926 | Preparation of ethylene/1-octene copolymers of very low density in a fluidized bed reactor A process for preparing ethylene/1-octene copolymers using a titanium based catalyst system under defined polymerization conditions.... | 04/21/1992 |
| 5106807 | Components and catalysts for the polymerization of olefins Disclosed are solid catalyst components for the polymerization of olefins comprising a titanium halide or titanium alkoxy halide, and an electron-donor compound selected from silicon compounds of the formula ##STR1## where R1, R2 | 04/21/1992 |
| 5102842 | Catalyst for the polymerization of alpha-olefins containing trifluoropropyl substituted silane compounds Disclosed are catalysts for the polymerization of alpha-olefins comprising the reaction product of: (A) an Al-alkyl compound; (B) a trifluoropropyl substituted silane compound; (C) a solid component comprising a titanium compound having at least a Ti-halogen b... | 04/07/1992 |
| 5102841 | Process for the production of polyethylene A process for the production of polyethylene comprising contacting ethylene or a mixture comprising ethylene and one or more alpha-olefins and, optionally, one or more diolefins, under polymerization conditions, with a catalyst system comprising: (a) a pa... | 04/07/1992 |
| 5084429 | Catalysts for polymerization of olefins A catalyst for use in polymerization of olefins which comprises a carrier mainly composed of a magnesium compound precipitated from a solution and a catalytic component supported on the carrier and selected from titanium halides, vanadyl halides and vanad... | 01/28/1992 |
| 5082818 | Production of olefin polymers Ziegler polymerization of -olefins is disclosed which is characterized by a solid catalyst component used in the Ziegler-type catalyst. The solid catalyst component, Component (A), comprises Component (i) which is a solid catalyst component for a Z... | 01/21/1992 |
| 5081090 | Dry olefin polymerization catalyst A solid hydrocarbon-insoluble, alpha-olefin polymerization catalyst component with superior activity, stereospecificity and morphology characteristics comprising the product formed by A) forming a solution of a magnesium-containing species from a magnesiu... | 01/14/1992 |
| 5037908 | Process for polymerization of butene-1 An improved process for polymerizing butene-1 in the presence of a polymerization catalyst composed of (a) a catalyst component containing titanium and halogen as essential constituents and (b) an organometallic compound, wherein the improvement comprises... | 08/06/1991 |
| 5034361 | Catalyst precursor production Normally sparingly soluble magnesium alkoxide is solubilized in alkanol by the additional presence of certain acidic materials. The resulting solution is used to produce a mixture of substantially spherical particles, substantially free of fines, containi... | 07/23/1991 |
| 4990477 | Olefin polymerization catalyst component, process for production thereof, olefin polymerization catalyst, and process for polymerizing olefins A catalyst component (X") obtained by treating an olefin polymerization catalyst (X) formed from (A) a solid titanium catalyst component comprising magnesium, titanium, halogen and an electron donor as essential ingredients, (B) an organoaluminum compound... | 02/05/1991 |
| 4946816 | Morphology-controlled olefin polymerization catalyst In a solid hydrocarbon-insoluble, alpha-olefin polymerization catalyst component with superior activity, stereospecificity and morphology characteristics comprising the product formed by (A) forming a solution of a magnesium-containing species from a magn... | 08/07/1990 |
