Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 7276152 | Oxidative desulfurization and denitrogenation of petroleum oils A robust, non-aqueous, and oil-soluble organic peroxide oxidant is employed for oxidative desulfurization and denitrogenation of hydrocarbon feedstocks including petroleum fuels. Even at low concentrations, the non-aqueous organic peroxide oxidant is extremely activ... | 10/02/2007 |
| 7256239 | Polymer film A film of a polyethylene produced by polymerization catalysed by a single site catalyst and comprising as comonomers to ethylene at least two C4-12 alpha olefins, preferably but-1-ene and hex-1-ene. ... | 08/14/2007 |
| 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 |
| 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 |
| 7126035 | Catalyst composition for oxychlorination The present invention relates to a catalyst composition for the oxychlorination of ethylene, comprising a mixture of metal salts on a support, where said metal salts are applied to the support in such ratios that the catalyst composition comprises a) fr... | 10/24/2006 |
| 7101939 | Ethylene/α-olefin copolymer made with a non-single-site/single-site catalyst combination, its preparation and use An ethylene/α-olefin copolymer comprising a component produced by a non-single-site polymerization catalyst and a component produced by a single-site polymerization catalyst, its preparation and use are described. The copolymer has an α-olefin content of 5 to 20 p... | 09/05/2006 |
| 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 |
| 6919396 | Mg-Al-based hydrotalcite-type particles, chlorine-containing resin composition and process for producing the particles A chlorine-containing resin composition for covering an electric wire of the present invention, has a heat stability of not less than 240 minutes and a volume resistivity of 5.0×1013 to 1.0×1016 Ω·cm when measured according to JIS K6723, an... | 07/19/2005 |
| 6468938 | Prepolymerized catalyst components for the polymerization of olefins The invention provides new prepolymerized catalyst components for the (co)polymerization of olefins CH2.dbd.CHR, wherein R is hydrogen or a C1-C12 alkyl group, characterized by comprising a solid catalyst component, comprising Ti, Mg, halogen a... | 10/22/2002 |
| 6265338 | Monocyclopentadienyl titanium metal compounds for ethylene--olefin copolymer production catalysts The invention is a catalyst system including a monocyclopentadienyl titanium compound, where the monocyclopentadienyl group is bonded to a silylene-imido moiety which is further bonded to the titanium atom, and an alumoxane component which is highly produ... | 07/24/2001 |
| 5994255 | Allyl containing metal complexes and olefin polymerization process Catalysts for olefin polymeriztion comprising metal complexes corresponding to the formula: ##STR1## or a dimer, solvated adduct, chelated derivative or mixture thereof, wherein: L is a cyclic group or Y*, that is bound to M by means of a delocalized... | 11/30/1999 |
| 5846896 | Metallocene catalyst systems A catalyst system for polymerization of olefins having increased molecular weight and melting point is disclosed. A chiral, stereorigid metallocene compound having a silicon hydrocarbyl compound as an interannular bridge between two cyclopentadienyl or su... | 12/08/1998 |
| 5824620 | Heterogeneous metallocene catalysts and use thereof in olefin polymerization process This invention is related to a method for the preparation of heterogeneous catalysts, useful for the production of poliolefins. The method is characterized because said catalysts are obtained by supporting onto solids soluble metallocenes possessing one o... | 10/20/1998 |
| 5744414 | Process for preparing an olefin polymerisation catalyst The present invention relates to a process for the preparation of a solid catalytic component of a catalyst of Ziegler-Natta type, comprising contacting (i) at least one compound (A) of a transition metal (TM) with (ii) a solid product (B) comprising a ma... | 04/28/1998 |
| 5585447 | Catalyst for the (co)polymerization of alpha-olefins, a process for its preparation and (co)polymerization process making use thereof This catalyst has the general formula VX3, mAIX3, nZ, wherein X is a halogen atom, Z is at least one at least partially halogenated, branched or unbranched, saturated hydrocarbon, m is between 0.1 and 10, and n is between 1 and 300. ... | 12/17/1996 |
| 5556820 | Catalyst component for olefin polymerization and process for producing polyolefins A solid product as a catalyst component for an olefin polymerization catalyst is obtained by the reaction of metallic magnesium, an alcohol, and a halogen in an amount ranging from 0.019 to 0.06 gram-atom per one mole of metallic magnesium. Alternatively,... | 09/17/1996 |
| 5498770 | Catalyst for the polymerization of olefins and process for the polymerization of olefins A catalyst for the polymerization of olefins comprising (A) a solid catalyst component essentially containing magnesium, titanium, an electron donor compound, and a halogen which is prepared by contacting a magnesium compound, a titanium halide compound, ... | 03/12/1996 |
| 5488022 | Catalyst component for olefin polymerization A catalyst component for olefin polymerization which comprises an intimate mixture of: Component (A1) which is a solid component for Ziegler catalysts comprising titanium, magnesium and a halogen as essential components in a particulate form; and Componen... | 01/30/1996 |
| 5480850 | Ethylene/propylene copolymer rubbers A catalyst system comprising: (a) a catalyst precursor consisting essentially of the reaction product of vanadium (acetylacetonate)3 and a compound having the formula AlR.sub.(3-a) Xa wherein each R is independently alkyl having 1 to 14 ... | 01/02/1996 |
| 5399622 | System of chromium catalyst and yttrium catalyst, olefin polymerization process, and polymer A catalyst system for the polymerization of alpha-olefins comprising a chromium-containing catalyst and an yttrium-containing catalyst wherein the yttrium-containing catalyst is represented by the formula (Cp2 YXx)y.M.sub.z | 03/21/1995 |
| 5387567 | Catalyst components for polymerization of olefins A catalyst component is disclosed for use in the homo-or copolymerization of olefinic hydrocarbons. The catalyst component is comprised of a first compound of the formula Me1 (OR1)p R2q X14-... | 02/07/1995 |
| 5376612 | Chromium catalysts and process for making chromium catalysts Novel chromium-containing compounds, such as, for example, chromium pyrrolides, are prepared by forming a mixture of a chromium salt, a metal amide, and an electron pair donor solvent, such as, for example, an ether. These novel chromium-containing, or ch... | 12/27/1994 |
| 5366947 | Initiators for materials which can be polymerized cationically Initiator compositions for materials which can be polymerized cationically are described, these containing i) an anhydride of a polycarboxylic acid, a polyisocyanate, a cyclic carbonate, a lactone or a mixture of such compounds, and dissolved therein ii) at le... | 11/22/1994 |
| 5324697 | Phillips catalyst and its use for preparing ethylene homopolymers and copolymers A novel Phillips catalyst for the homopolymerization of ethylene and the copolymerization of ethylene with -olefins contains as catalytically active components a specific chromium catalyst on an aluminum phosphate support and cocatalysts of the for... | 06/28/1994 |
| 5318935 | Amido transition metal compound and a catalyst system for the production of isotatic polypropylene Certain bridged and unbridged amido transition metal compounds of the Group IV-B metals are disclosed. These compounds may be used in a catalyst system comprising the amido transition metal compound and an alumoxane. Also disclosed is a process using the ... | 06/07/1994 |
| 5275991 | Supported high activity polyolefin catalyst component with regular distribution of magnesium values provided utilizing a controlled drying protocol A novel catalyst support and a method for preparation thereof, characterized by the presence of selected amounts of a hydrocarbon soluble magnesium-containing compound applied to the support relative to solvent, wherein a surface uniformly and essentially... | 01/04/1994 |
| 5223465 | Olefin polymerization catalyst The present invention aims at providing an olefin polymerization catalyst comprising, as a component, a transition metal compound having two ligands such as ଲ-diketone, etc. coordinated, and having excellent properties as a polymerization catalyst i... | 06/29/1993 |
| 5206198 | Catalytic solid usable for the stereospecific polymerization of alpha-olefins, process for preparing it and process for polymerizing alpha-olefins in its presence Catalytic solids based on titanium trichloride complex, usable for the stereospecific polymerization of alpha-olefins, obtained by heat treatment, in the presence of a halogenated activating agent, of the liquid material resulting from bringing TiCl4... | 04/27/1993 |
| 5204305 | Cocatalytic composition which is usable for the polymerization of alpha-olefins Cocatalytic composition resulting from bringing an organoaluminium halide (A) into contact with an electron-donating organic compound (ED) selected from esters, amides and ketones, the organoaluminium halide (A) possessing an atomic ratio halogen (X)/alum... | 04/20/1993 |
| 5177042 | High activity vanadium-based catalyst A vanadium-based catalyst system is treated with an ether as a means of enhancing catalyst activity and polymer productivity.... | 01/05/1993 |
| 5177043 | -olefin polymerization catalyst component This invention relates to a catalytic component for the polymerization of -olefins and provides a catalytic component of magnesium support type capable of exhibiting a high stereoregularity while maintaining an improved strength as well as a high c... | 01/05/1993 |
| 5153158 | Solid catalyst components for olefin polymerization and processes for the polymerization of olefin using same The present invention relates to solid catalyst components for olefin polymerization formed by prepolymerizing at least two types of -olefin on an olefin polymerization catalyst comprising a solid titanium catalyst component, an organometallic comp... | 10/06/1992 |
| 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 |
| 5147839 | Production of -olefin polymers Ziegler polymerization of -olefins is disclosed which is characterized by a solid catalyst component. The solid catalyst component, Component (A), comprises Sub-component (i) which is a solid catalyst component for Ziegler catalysts comprising Ti, ... | 09/15/1992 |
| 5143880 | Solid catalyst component for use in polymerization of -olefins A solid-catalyst component for use in the polymerization of -olefins obtained by reducing a titanium compound represented by the following general formula: Ti(OR1)n x4-n wherein R1 represents a hydrocarbon group h... | 09/01/1992 |
| 5139986 | Catalyst composition for production of linear low-density ethylene-hexene copolymers and films thereof The invention relates to catalysts for ethylene polymerization or copolymerization to produce film quality product which exhibits improved FDA hexane extractables. The invention also relates to catalysts for ethylene polymerization or copolymerization to ... | 08/18/1992 |
| 5114896 | Process for the production of a catalytic component for the polymerization of olefins This invention relates to a process for the production of a catalytic component for the polymerization of olefins, in particular, for the production of a catalytic component capable of exhibiting a high polymerization activity in the polymerization of ole... | 05/19/1992 |
| 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 |
| 5096869 | High activity vanadium-based catalyst A vanadium-based catalyst system is treated with an aluminum alkoxide as a means of enhancing catalyst activity and polymer productivity.... | 03/17/1992 |
| 5089460 | Vanadium catalyst systems for olefin polymerization A catalyst system for the polymerization of alpha-olefins comprising: (a) a solid precursor comprising the reaction product of (i) a halogenated vanadium compound wherein the vanadium has a valence of 2 to 5; (ii) a magnesium compound; and (iii) an inside elec... | 02/18/1992 |
