Class / Patent application number | Description | Number of patent applications / Date published |
526113000 | Two or more diverse transition metal atoms in distinct compounds or in the same compound | 81 |
20080214753 | Catalyst systems and their use in polymerization processes - A catalyst system comprising a hafnocene catalyst compound and zirconocene catalyst compound, wherein the hafnocene and/or zirconocene include(s) at least one ligand substituted with at least one linear or iso alkyl group having 3 or more carbon atoms is provided. A process for polymerizing olefin(s) using the same catalyst system is also provided. | 09-04-2008 |
20080234449 | Catalyst Activation and Resins Therefrom - The present invention relates to the removal of hydrocarbon residues from a catalyst and more specifically the air activation of a catalyst containing hydrocarbon residues. It also relates to extruded pipe and utility conduit resins comprising polyethylene, household/industrial chemicals container resins, and to a polyethylene resin particularly suitable for large parts by blow molding and sheet extrusion procedures, wherein the resin is made by a process using an activated chromium and titanium-based catalyst. | 09-25-2008 |
20090275710 | Methods of preparing a polymerization catalyst - A method comprising contacting a support with a chromium-containing compound and a tin-containing compound to produce a catalyst precursor, and activating the catalyst precursor in a temperature range of from about 400° C. to about 700° C. to produce a polymerization catalyst. A method comprising contacting a support with a chromium-containing compound and a tin-containing compound to produce a catalyst precursor, activating the catalyst precursor in a temperature range of from about 400° C. to about 700° C. to produce a polymerization catalyst, and contacting the polymerization catalyst with ethylene in a reaction zone under suitable reaction conditions to form polyethylene wherein the molecular weight distribution of the polyethylene is broadened. | 11-05-2009 |
20100069585 | Chromium-Based Catalysts - The present invention provides a process for preparing a supported chromium-based catalyst for the production of polyethylene comprising the steps of a) providing a silica-based support having a specific surface area of at least 250 m | 03-18-2010 |
20100105850 | METHOD FOR MAKING NITROGEN AROMATIC OLIGOMERS AND POLYMERS - Methods for synthesizing dimeric or polymeric reaction products of nitrogen aromatics comprise contacting a composition comprising the nitrogen aromatic with a catalyst composition. The catalyst comprises a first metal substrate having a second reduced metal coated on the substrate. | 04-29-2010 |
20100121007 | CATALYST FOR PRODUCING OF ACRYLIC ACID, METHOD FOR PRODUCING ACRYLIC ACID USING THE CATLYST AND METHOD FOR PRODUCING WATER-ABSORBENT RESIN USING THE ACRYLIC ACID - The invention provides a catalyst for producing acrylic acid at high yield for a long time, in a method for producing acrylic acid by catalytic gas phase oxidation of propane and/or acrolein in the presence of molecular oxygen or a molecular oxygen-containing gas. This catalyst comprises a complex oxide containing molybdenum, vanadium and X component (here the X component is at least one element selected from antimony, niobium and tin) as the essential components, and is characterized in that its main peak as measured by X-ray diffractiometry using Kα ray of Cu, d=4.00±0.1 angstrom, and in that the particle size of the X component in the catalyst does not exceed 20 μm. | 05-13-2010 |
20110201770 | DUAL METALLOCENE CATALYSTS FOR POLYMERIZATION OF BIMODAL POLYMERS - This invention relates to catalyst compositions, methods, and polymers encompassing at least one first Group 4 metallocene compound comprising bridging η | 08-18-2011 |
20110218307 | Systems and Methods for Fabricating Polymers - The present invention is broadly directed to various methods and systems for gas and liquid phase polymer production. In certain embodiments, the methods are performed in conjunction with a polymerization reactor system such as gas phase reactor system or liquid phase reactor system. The invention is also broadly directed to various systems in which polymer properties are manipulated by addition of DEALE directly to a polymerization reactor system. | 09-08-2011 |
20120046428 | Mixed Metal Catalyst Systems Having a Tailored Hydrogen Response - A polymerization catalyst system and polymerization processes using the catalyst systems are disclosed. The polymerization catalyst systems may include a) a first catalyst compound, and b) a second catalyst compound, wherein the first catalyst compound includes an oxadiazole-containing compound. In some embodiments, the oxadiazole-containing compound has essentially no hydrogen response, thus allowing better and/or tailored control of product properties when producing polymers using the catalyst system. | 02-23-2012 |
20120059134 | Novel Catalyst Systems and Methods of Making and Using Same - A catalyst composition comprising (a) a first metallocene complex represented by the general formula: | 03-08-2012 |
20120214954 | Polymer Compositions for Rotational Molding Applications - A polymer having a density of from about 0.94 g/cm | 08-23-2012 |
20120289667 | Ultra-High Molecular Weight Polyethylene - A novel UHMW polyethylene material, which is displaying excellent abrasion resistance amongst other properties, is devised. | 11-15-2012 |
20120316298 | Linear Low Density Polymers Having Optical and Processing Capabilities of Low Density Polyethylene - The present invention discloses a catalyst system that comprises several bridged bis- or bis-tetrahydro-indenyl components having different substitution patterns in order to prepare polymers having a broad molecular weight distribution. | 12-13-2012 |
20120322959 | CATALYSTS OF THE ZIEGLER-NATTA TYPE FOR THE (CO)POLYMERIZATION OF OLEFINS WITH A HIGH PRODUCTIVITY - Solid catalyst with a high thermal stability for the (co)polymerization of α-olefins, comprising titanium, magnesium, at least one metal selected from hafnium and zirconium, aluminum and chlorine, wherein at least 60% of the titanium is in oxidation state +3, and, when examined by means of XPS spectroscopy, has an absorption band characteristic of a binding energy ranging from 455 to 458 eV. Said catalyst, used in combination with a suitable co-catalyst in (co)polymerization processes of α-olefins at a high temperature, shows an improved productivity, a high incorporation of co-monomers in the copolymerization of ethylene and an increased thermal stability with respect to the systems so far in use. | 12-20-2012 |
20130053523 | Polymerization Process for Producing Bimodal Polymers - Catalyst compositions comprising a first metallocene compound, a second metallocene compound, an activator-support, and an organoaluminum compound are provided. An improved method for preparing cyclopentadienyl complexes used to produce polyolefins is also provided. | 02-28-2013 |
20130079477 | Dual Metallocene Catalyst Systems for Decreasing Melt Index and Increasing Polymer Production Rates - The present invention provides dual catalyst systems and polymerization processes employing these dual catalyst systems. The disclosed polymerization processes can produce olefin polymers at higher production rates, and these olefin polymers may have a higher molecular weight and/or a lower melt index. | 03-28-2013 |
20130137839 | Long Chain Branched Polymers and Methods of Making Same - A polymer having a long chain branching content peaking at greater than about 20 long chain branches per million carbon atoms, and a polydispersity index of greater than about 10 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution. A polymer having a long chain branching content peaking at greater than about 8 long chain branches per million carbon atoms, a polydispersity index of greater than about 20 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution. A polymer having a long chain branching content peaking at greater than about 1 long chain branches per chain, and a polydispersity index of greater than about 10 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution. | 05-30-2013 |
20130144017 | Methods of Preparing a Catalyst - A method of preparing a catalyst comprising contacting an acidic colloidal silica suspension with a titanium-containing compound to form a mixture, adjusting the pH of mixture to about neutral to form a catalyst support, and contacting the catalyst support with chromium-containing compound to from a chromium-supported catalyst. A catalyst support prepared by contacting a colloidal silica suspension and a titanium-containing compound under acidic conditions to form a mixture, and contacting the mixture with a basic material in an amount sufficient to increase the pH of the mixture to about 7. | 06-06-2013 |
20130158215 | MODIFIED ZIEGLER-NATTA CATALYST SYSTEMS - This invention relates to modified Ziegler-Natta catalyst systems that have an excellent activity in homo- or co-polymerisation of ethylene and alpha-olefins and are able to produce polymers having reduced molecular weight distribution and improved incorporation of hexene with respect to conventional Ziegler-Natta catalyst systems. | 06-20-2013 |
20130245210 | Dual Metallocene Catalyst Systems for Decreasing Melt Index and Increasing Polymer Production Rates - The present invention provides dual catalyst systems and polymerization processes employing these dual catalyst systems. The disclosed polymerization processes can produce olefin polymers at higher production rates, and these olefin polymers may have a higher molecular weight and/or a lower melt index. | 09-19-2013 |
20130289226 | Use of Hydrogen and an Organozinc Compound for Polymerization and Polymer Property Control - Methods of controlling polymerization reactions using a synergistic amount of hydrogen and an organozinc compound are disclosed. The resulting polymers have lower molecular weights and higher melt flow indices. | 10-31-2013 |
20130317184 | CATALYST PRECURSOR AND CATALYST FOR THE HIGH-TEMPERATURE (CO)POLYMERIZATION OF ALPHA-OLEFIN - A precursor for the formation of catalysts for the (co)polymerization of α-olefins, comprising titanium, magnesium, at least one metal selected from hafnium and zirconium, aluminum and chlorine, obtained with a process comprising treatment with a siloxane compound. Said solid precursor, used in combination with a suitable co-catalyst in high-temperature (co)polymerization processes of α-olefins, shows an improved productivity, a high incorporation of co-monomers in the copolymerization of ethylene and an increased thermal stability with respect to the systems so far in use. | 11-28-2013 |
20140024789 | ADJUSTING POLYMER COMPOSITION - A scavenger is used to indirectly control the ratio of polymer components in a polyethylene composition made using a combination catalyst comprising an inorganic chromium catalyst, and a group 4 single site catalyst. | 01-23-2014 |
20140088274 | Metallocene and Half Sandwich Dual Catalyst Systems for Producing Broad Molecular Weight Distribution Polymers - Disclosed herein are polymerization processes for the production of olefin polymers. These polymerization processes can use a dual catalyst system containing a zirconium or hafnium based metallocene compound and a titanium based half-metallocene compound containing an indenyl group. | 03-27-2014 |
20140179882 | Systems and Methods for Fabricating Polymers - The present invention is broadly directed to various methods and systems for gas and liquid phase polymer production. In certain embodiments, the methods are performed in conjunction with a polymerization reactor system such as gas phase reactor system or liquid phase reactor system. The invention is also broadly directed to various systems in which polymer properties are manipulated by addition of DEALE directly to a polymerization reactor system. | 06-26-2014 |
20140179883 | Catalyst and Process for Producing a Polymer Containing a High Molecular Weight Tail - The present invention provides metal-containing sulfated activator-supports, and polymerization catalyst compositions employing these activator-supports. Methods for making these metal-containing sulfated activator-supports and for using such components in catalyst compositions for the polymerization of olefins are also provided. | 06-26-2014 |
20140213744 | Novel Catalyst Compositions and Methods of Making and Using Same - A catalyst composition comprising (i) a metal salt complex of an imine bis(phenol) compound characterized by Structure 1: | 07-31-2014 |
20140303332 | CATALYST FOR OLEFIN POLYMERIZATION AND COPOLYMERIZATION, AND OLEFIN POLYMERIZATION OR COPOLYMERIZATION METHOD USING SAME - The provided is an olefin (co)polymerization catalyst with an excellent catalyst activity, wherein the catalyst component is prepared by using a metallocene compound and titanocene compound or a half-titanocene compound so as to provide polyolefins having a high molecular weight and a low melt index, and also a method for olefin (co)polymerization using said catalyst. | 10-09-2014 |
20150025204 | Hybrid Supported Metallocene Catalyst, Method for Preparing the Same, and Process for Preparing Polyolefin Using the Same - Provided are a hybrid supported metallocene catalyst, a method for preparing the same, and a process for preparing an olefin polymer using the same, and more particular, a hybrid supported metallocene catalyst characterized in that two kinds of metallocene compounds containing a new cyclopenta[b]fluorenyl transition metal compound are supported on an inorganic or organic porous carrier surface-treated with an ionic compound and a co-catalyst, a method for preparing the same, and a process for preparing an olefin polymer using the hybrid supported metallocene catalyst. | 01-22-2015 |
20150080540 | NOVEL SUPPORTED DOUBLE CENTER HYBRID POLYETHYLENE CATALYST, PROCESS FOR PREPARING THE SAME AND USE THEREOF - The present invention relates to a carriered hybrid vanadium-chromium-based catalyst, characterized in the catalyst is carriered on a porous inorganic carrier and a V active site and an organic Cr active site are present on the porous inorganic carrier at the same time. The present invention further relates to a process for producing a carriered hybrid vanadium-chromium-based catalyst. The catalyst of the present invention can be used for producing ethylene homopolymers and ethylene/α-olefin copolymers. The hybrid vanadium-chromium-based catalyst can have high activity and produce polyethylene polymers having the properties of broad molecular weight distribution (Part of the products are bimodal distribution) and excellent α-olefin copolymerization characteristic. | 03-19-2015 |
20150099855 | GAS PHASE POLYMERISATION OF ETHYLENE - The present invention is directed to a process for the gas phase polymerisation of ethylene in the presence of a catalyst composition comprising a support material carrying a chromium compound and a magnesium containing compound represented by the formula R | 04-09-2015 |
20150141592 | BIMODAL POLYMERIZATION PROCESS UTILIZING CHROMIUM/SILICA CATALYSTS - The present invention relates to novel methods for producing a bimodal or broad distribution of molecular weight polyolefin polymers using Cr/silica catalysts. In some aspects the methods utilize different pressures of hydrogen to tailor the properties of the polymer. In particular aspects, a method of preparing a polyolefin having a bimodal molecular weight distribution, comprising:
| 05-21-2015 |
20150361007 | METHOD FOR PRODUCING AN OLEFIN BY CATALYTIC CONVERSION OF AT LEAST ONE ALCOHOL - The invention relates to a method for preparing an olefine, a diene or a polyene, by catalytic conversion of at least one alcohol having a carbon chain of at least three carbon atoms and different from propan-2-ol, in the presence of at least one catalyst based of at least one phosphate of a metal or several metals M, M being chosen from among the 15 lanthanides (Lanthanum, Cerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, Lutetium), Yttrium, Scandium and Boron, and the applications of this method. | 12-17-2015 |
20160168304 | OLEFIN BLOCK COPOLYMER AND PREPARATION METHOD THEREOF | 06-16-2016 |
526114000 | Contains non-transition elemental metal, hydride thereof, or carbon to non transition metal atom bond | 30 |
20100041842 | DUAL METALLOCENE CATALYSTS FOR POLYMERIZATION OF BIMODAL POLYMERS - This invention relates to catalyst compositions, methods, and polymers encompassing at least one first Group 4 metallocene compound comprising bridging η | 02-18-2010 |
20100160581 | Catalyst Composition for Polymerization of Olefins, Polymerization Process Using the Same, and Method for Its Preparation - The present invention relates to a supported catalyst composition for polymerization of olefins comprising at least two catalytic components; and a polymerization process using that catalyst composition; and a method for its preparation. | 06-24-2010 |
20100227987 | PROPYLENE-BASED POLYMER, PRODUCTION METHOD THEREFOR, COMPOSITION USING THE SAME, AND APPLICATION THEREOF - A propylene-based polymer which is suitably applicable to foam molding, sheet molding, blow molding or the like, because of having good flow characteristics, high melt tension, high swell ratio and thus good molding workability. | 09-09-2010 |
20110021726 | PREPOLYMERIZATION CATALYST COMPONENT AND PROCESS FOR PRODUCING THE SAME - The purpose of the invention is to provide a process for producing a prepolymerization catalyst component which is homogeneous and does not a tendency that it adheres to a wall surface of a dryer and that the prepolymerization catalyst component are aggregated with each other. The process comprises the following steps (1) to (4): | 01-27-2011 |
20110288248 | Reduced reactor fouling - Fouling in a dispersed phase reactor in the presence of a phosphinimine catalyst and MAO may be reduced by reducing the loading of the phosphinimine catalyst to provide from 0.02 to 0.031 mmol of transition M per g of catalyst while still maintaining a productivity of not less than 2500 g of polymer/gram of catalyst. The catalyst may optionally be used in the presence of an antistatic agent. | 11-24-2011 |
20120010375 | CATALYSTS FOR PRODUCING BROAD MOLECULAR WEIGHT DISTRIBUTION POLYOLEFINS IN THE ABSENCE OF ADDED HYDROGEN - The present invention provides a polymerization process utilizing a dual metallocene catalyst system for the production of broad or bimodal molecular weight distribution polymers, generally, in the absence of added hydrogen. Polymers produced from the polymerization process are also provided, and these polymers can have a Mn in a range from about 9,000 to about 30,000 g/mol, and a short chain branch content that decreases as molecular weight increases. | 01-12-2012 |
20120252991 | METHOD FOR PREPARING SUPPORTED METALLOCENE CATALYST AND SUPPORTED METALLOCENE CATALYST PREPARED USING THE SAME - The present invention provides a method for preparing a supported metallocene catalyst, a supported metallocene catalyst prepared by the method, and a method for preparing a polyolefin using the supported metallocene catalyst. The supported metallocene catalyst according to the present invention contains catalyst components uniformly distributed deep into the whole porous carrier particles to secure a high catalytic activity and facilitates polymerization of polyolefins with high bulk density. | 10-04-2012 |
20120259077 | MIXED METALLOCENE CATALYST COMPOSITION AND METHOD FOR PREPARING POLYOLEFIN USING THE SAME - The present invention relates to a mixed metallocene catalyst composition including a first metallocene catalyst and a second metallocene catalyst, and a method for preparing a polyolefin using the catalyst composition. According to the catalyst composition and the preparation method, provided is a polyolefin having a wide molecular weight distribution and superior mechanical properties and processability. | 10-11-2012 |
20130072646 | NOVEL CATALYST COMPOSITION AND PROCESS FOR PREPARING OLEFIN POLYMER USING THE SAME - The present invention relates to a catalyst composition and a process for preparing an olefin polymer using the same. More specifically, the present invention relates to a novel catalyst composition comprising at least two types of catalysts and a process for preparing an olefin polymer having excellent heat resistance using the same. The present invention can provide an olefin polymer having excellent activity and high heat resistance, and also can control the values of density, heat resistance and melt index (MI) of the olefin polymer. | 03-21-2013 |
20130158216 | Use of Hydrogen and an Organozinc Compound for Polymerization and Polymer Property Control - Methods of controlling polymerization reactions using a synergistic amount of hydrogen and an organozinc compound are disclosed. The resulting polymers have lower molecular weights and higher melt flow indices. | 06-20-2013 |
20130211020 | CATALYST COMPOSITION FOR OLEFIN POLYMERIZATION AND PREPARATION METHOD FOR POLYOLEFIN USING THE SAME - The present invention relates to a catalyst composition comprising a novel transition metal compound and a preparation method for polyolefin using the same. The catalyst composition of the present invention has high catalytic activity for polymerization of olefin-based monomers and enables it to control the fine-structure characteristics of the polyolefin, such as molecular weight distribution, in a wide range, thereby easily providing a polyolefin with desired properties. | 08-15-2013 |
20130289227 | PROCESS OF MAKING MODIFIED METALLOCENE CATALYST, CATALYST PRODUCED AND USE THEREOF - Olefin polymerization catalysts or catalyst systems comprising a mixture, contact product, reaction product or complex comprising as elements or components: (A) at least one metallocene pre-catalyst compound or polymerization active metallocene compound; (B) at least one titanium containing metallocene compound; and when (A) is a metallocene pre-catalyst compound, (C) at least one activator; provided however: (I) the titanium-containing metallocene compound is inactive or substantially inactive for the polymerization of olefins prior to or concurrently with the use of the catalyst system for olefin polymerization. Also disclosed are processes for producing the catalyst system and polyolefins having desirable combinations of properties, including melt index and molecular weight distribution, which properties are particularly desirable for the manufacture of polyolefin film products, especially LLDPE film A preferred catalyst comprises a zirconium or hafnium metal containing metallocene, an inactivated titanocene and a SiO2 support carrier. | 10-31-2013 |
20140235804 | Dual Metallocene Catalyst Systems for Decreasing Melt Index and Increasing Polymer Production Rates - The present invention provides dual catalyst systems and polymerization processes employing these dual catalyst systems. The disclosed polymerization processes can produce olefin polymers at higher production rates, and these olefin polymers may have a higher molecular weight and/or a lower melt index. | 08-21-2014 |
20160024236 | Low Density Polyolefin Resins With Low Molecular Weight and High Molecular Weight Components, and Films Made Therefrom - Disclosed herein are ethylene-based polymers produced using dual metallocene catalyst systems. These polymers have low densities, high molecular weights, and broad molecular weight distributions, as well as having the majority of the long chain branches in the lower molecular weight component of the polymer, and the majority of the short chain branches in the higher molecular weight component of the polymer. Films produced from these polymers have improved impact and puncture resistance. | 01-28-2016 |
526115000 | Contains Group VIII metal atom (Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt) | 5 |
20090054606 | CATALYST COMPOSTIONS AND POLYOLEFINS FOR EXTRUSION COATING APPLICATIONS - This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, including polymerization methods using a supported catalyst composition. In one aspect, the present invention encompasses a catalyst composition comprising the contact product of a first metallocene compound, a second metallocene compound, at least one chemically-treated solid oxide, and at least one organoaluminum compound. The new resins were characterized by useful properties in impact, tear, adhesion, sealing, extruder motor loads and pressures at comparable melt index values, and neck-in and draw-down. | 02-26-2009 |
20090118445 | Hybrid Catalyst Systems Supported On Magnesium Halide - The present invention relates to a catalyst system comprising at least two different transition metal coordination compounds supported on an adduct containing magnesium halide and an organoaluminum compound and it relates to a polymerisation process in the presence of said catalyst system. | 05-07-2009 |
20110092654 | Reactor continuity - Single site reactor/catalyst continuity in a dispersed phase reaction in terms of initial activation and subsequent deactivation may be improved by treating the support with a metal salt. The activator and catalyst are then deposited on the treated support. The resulting catalyst has a lower consumption of ethylene during initiation and a lower rate of deactivation. Preferably the catalyst is used with an antistatic agent. | 04-21-2011 |
20110294969 | Catalyst System for Olefin Polymerization, Its Production and Use - Process for supportation of a catalyst system comprising at least two different active catalyst components on a support wherein
| 12-01-2011 |
20150329657 | CATALYST SYSTEM FOR THE PREPARATION OF POLYOLEFINS - A catalyst system obtainable by contacting:
| 11-19-2015 |
526116000 | At least one Group IVB metal atom (Ti, Zr, Hf) and at least one Group VB meta l (V, Nb, Ta) | 11 |
20080287617 | Catalyst System For Olefin Polymerization And Polymers Produced Therefrom - This invention relates to a catalyst system comprising:
| 11-20-2008 |
20080312390 | Process for preparation of polyolefin alloy - A process for preparing polypropylene compositions having high impact strength at low temperatures is disclosed in which the reaction is catalyzed by Ziegler-Natta/metallocene hybrid catalysts by the in-situ polymerization of one or more olefins of the formula CH | 12-18-2008 |
20100168349 | PROCESS FOR PRODUCING ALPHA-OLEFIN POLYMERIZATION CATALYST - A production process of an α-olefin polymerization catalyst, comprising the steps of (1) reducing a titanium compound represented by a defined formula with an organomagnesium compound in the presence of an Si—O bond-containing silicon compound, (2) contacting the resultant solid catalyst component precursor, a halogenating compound and an internal electron donor with one another, and (3) contacting the resultant solid catalyst component, an organoaluminum compound and a Si-containing external electron donor represented by a defined formula with one another; and a production process of an olefin polymer using the above catalyst. | 07-01-2010 |
20100292418 | PROCESS FOR POLYMERIZING OLEFIN-BASED POLYMERS - A process for producing an olefin-based polymer, said process comprising polymerizing at least one monomer, in the gas phase, or in a slurry process, in the presence of at least the following components:
| 11-18-2010 |
20100324236 | NANO-LINKED HETERONUCLEAR METALLOCENE CATALYST COMPOSITIONS AND THEIR POLYMER PRODUCTS - The present invention provides polymerization catalyst compositions employing novel heterodinuclear metallocene compounds. Methods for making these new dinuclear metallocene compounds and for using such compounds in catalyst compositions for the polymerization of olefins are also provided. | 12-23-2010 |
20110015356 | OXYGEN-BRIDGED BIMETALLIC COMPLEX AND POLYMERIZATION PROCESS - An oxygen-bridged bimetallic complex of the general formula (I) | 01-20-2011 |
20110184132 | Catalyst Compositions Comprising Support Materials Having an Improved Particle-Size Distribution - A catalyst composition that includes a support material having an improved particle-size distribution is provided. Processes for producing polyolefin composition also are provided. Polymers and films also are provided. An example of a catalyst composition is a supported multi-transition-metal catalyst composition that includes: (a) at least two catalyst components selected from the group consisting of: a nonmetallocene catalyst component and a metallocene catalyst component; (b) a support material that has a D | 07-28-2011 |
20110319575 | Catalyst Compositions and Polyolefins for Extrusion Coating Applications - This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, including polymerization methods using a supported catalyst composition. In one aspect, the present invention encompasses a catalyst composition comprising the contact product of a first metallocene compound, a second metallocene compound, at least one chemically-treated solid oxide, and at least one organoaluminum compound. The new resins were characterized by useful properties in impact, tear, adhesion, sealing, extruder motor loads and pressures at comparable melt index values, and neck-in and draw-down. | 12-29-2011 |
20120149857 | CATALYST SYSTEM AND A PROCESS FOR THE PRODUCTION OF POLYETHYKLENE - The invention relates to a catalyst system comprising I. a solid reaction product obtained by reaction of: (a) a hydrocarbon solution comprising (1) an organic oxygen containing magnesium compound (2) an organic oxygen containing titanium compound and (3) at least one compound containing zirconium and/or hafnium (b) a mixture comprising a metal compound having the formula MeR | 06-14-2012 |
20140288249 | Methods for Producing Polyolefins With Catalyst Systems - Described herein are methods comprising contacting one or more olefins with a catalyst system in a polymerization reactor at conditions sufficient to produce a polyolefin, wherein the catalyst system comprises a first metallocene catalyst compound comprising a first transition metal atom, two cyclopentadienyl ligands bound to the first transition metal atom, and two leaving groups bound to the first transition metal atom, wherein at least one leaving group is selected from the group consisting of a halo-phenoxy and a halo-alkoxy; wherein the first metallocene catalyst compound has a catalyst productivity that is at least 20% greater than a comparative metallocene catalyst compound used to produce the same polyolefin, wherein the comparative metallocene catalyst compound is the same as the first metallocene catalyst compound except neither leaving group is a halo-phenoxy or a halo-alkoxy. | 09-25-2014 |
20160194420 | Processes for Preparing Metallocene-Based Catalyst Systems | 07-07-2016 |
526117000 | Contains Group VIII metal atom (Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt) | 17 |
20080293896 | Diene polymerisation - A process and catalyst for producing homopolymers or copolymers of conjugated dienes by polymerising the monomer with a catalyst system comprising (A) a first transition metal compound selected from Cr, Mo and W compounds, and a second transition metal compound selected from Fe Co and Ni compounds (B) a catalyst modifier (eg triphenyl phosphine) and optionally (C) one or more catalyst activators (eg MAO). The cis, trans and 1,2-vinyl microstructure of the produced diene polymer can be controlled. | 11-27-2008 |
20090043056 | Process for the Preparation of an Improved Double Metal Cyanide Complex Catalyst, Double Metal Cyanide Catalyst and Use of Such Catalyst - Process for the preparation of a double metal cyanide (DMC) catalyst comprising a) preparation of a DMC catalyst; b) dispersing the catalyst of step a) in a dispersion agent, yielding a catalyst dispersion; c) allowing sedimentation of part of the catalyst from the catalyst dispersion obtained in step b), yielding a sedimentated catalyst and a dispersed catalyst; d) separating the dispersed catalyst from the sedimentated catalyst. | 02-12-2009 |
20100004410 | HYDROSILYLATION INHIBITOR, HYDROSILYLATION CATALYST COMPOSITION, AND CURABLE COMPOSITION - A hydrosilylation inhibitor comprising a reaction product of (1) a titanium compound having an alkoxy group in its ligand, and (2) an organosilicon compound having at least one hydrogen atom bonded to silicon atom per molecule is provided. This hydrosilylation inhibitor exhibits inhibitory activity for catalytic activity of a PGE (platinum group element)-bearing hydrosilylation catalyst in an oxygen atmosphere of up to 100 ppm and/or a moisture atmosphere of up to 100 ppm. By using the present invention, catalytic function of the hydrosilylation catalyst is reliably inhibited in the absence of oxygen and moisture while the same catalytic function is easily provided in the presence of the oxygen or the moisture. | 01-07-2010 |
20100022724 | Diene Polymerisation - A process for producing homopolymers or copolymers of conjugated dienes comprising contacting monomeric material comprising at least one conjugated diene with a catalyst system comprising two or more different transition metal compounds and optionally one or more activators. Preferred transition metal compounds are based on cobalt and chromium, especially complexes thereof having benzimidazole ligands. | 01-28-2010 |
20100324237 | POLYMERIZATION OF OLEFINS - Mixtures of different polyolefins may be made by direct, preferably simultaneous, polymerization of one or more polymerizable olefins using two or more transition metal containing active polymerization catalyst systems, at least one of which contains cobalt or iron complexed with selected ligands. The polyolefin products may have polymers that vary in molecular weight, molecular weight distribution, crystallinity, or other factors, and are useful as molding resins and for films. | 12-23-2010 |
20110130527 | METHOD FOR TRANSITIONING BETWEEN INCOMPATIBLE OLEFIN POLYMERIZATION CATALYST SYSTEMS - A method for transitioning from a first to a second catalyst system for the olefin polymerization reaction in one reactor, wherein the first catalyst system is incompatible with the second catalyst system, is described. The method comprises the steps of a) discontinuing a first olefin polymerization reaction performed in the presence of the first catalyst system; and b) performing a second olefin polymerization reaction in the presence of the second catalyst system comprising catalyst components (A) and (B) producing, respectively, a first and a second polyolefin fraction, wherein the M | 06-02-2011 |
20110130528 | POLYMERIZATION OF OLEFINS - Mixtures of different polyolefins may be made by direct, preferably simultaneous, polymerization of one or more polymerizable olefins using two or more transition metal containing active polymerization catalyst systems, at least one of which contains cobalt or iron complexed with selected ligands. The polyolefin products may have polymers that vary in molecular weight, molecular weight distribution, crystallinity, or other factors, and are useful as molding resins and for films. | 06-02-2011 |
20110230629 | Impact Resistant LLDPE Composition and Films Made Thereof - Method of polymerizing ethylene with C3-C20-olefine-comonomer, comprising the step of carrying out the olymerization in a single gas phase reactor with a mixed catalyst system herein the catalyst system has a catalyst mileage of higher than 6000 g polymer product/g catalyst. | 09-22-2011 |
20110251360 | Process for the Polymerization of Ethylene, and Ethylene Polymers Having Broad Molecular Weight Distribution and Long-Chain Branching - New ethylene polymers having broad molecular weight distribution and long-chain branching, above all at high molecular weight fractions; the polymers have strain hardening equal or higher than 1.4 (at constant elongational rate of 0.5 s | 10-13-2011 |
20110282012 | Process for preparing ethylene copolymers - A process for preparing polyethylene which comprises ethylene homopolymers and/or copolymers of ethylene with 1-alkenes and has a molar mass distribution width M | 11-17-2011 |
20120232234 | Safe removal of volatile, oxidizable compounds from particles, in particular polymer particles - In a method of removing volatile oxidizable compounds from particles present in a container, a gas stream is continuously introduced into the container, the gas stream takes up the oxidizable compound from the particles in the container and a gas stream laden with the oxidizable compound is discharged from the container. In the method of the present invention, oxygen is added to the gas stream which has been discharged and the oxidizable compound present in the discharged gas stream is subsequently at least partly catalytically oxidized by means of the oxygen and this oxidized gas stream forms at least part of the gas stream introduced, so that the gas stream is circulated. This makes safe and inexpensive removal of the oxidizable compounds from the particles possible. | 09-13-2012 |
20130041119 | OLEFIN POLYMER PRODUCING METHOD, ETHYLENE POLYMER, AND MOLD PRODUCT - A method for producing an olefin polymer, including: polymerizing olefin monomers using the following substance (A1), the following substance (A2), and an activating agent (B): | 02-14-2013 |
20130116392 | Polyethylene Composition And Method For Obtaining Same - New plastomer material for use in automotive parts such as bumpers is devised here, which is a novel polyethylene produced by a gas phase process. | 05-09-2013 |
20130123444 | ETHYLENE POLYMERIZATION USING DISCRETE NICKEL(II) IMINOPHOSPHONAMIDE COMPLEXES - The present invention generally relates to a new method of polymerizing ethylene. In one embodiment, the present invention relates to compounds utilized in the polymerization of ethylene and to a synthesis/polymerization method that uses same. In another embodiment branched polyethylene is synthesized from an ethylene monomer using, in this embodiment, at least one nickel iminophosphonamide (PN | 05-16-2013 |
20140088275 | PROCESS FOR THE MANUFACTURE OF A MIXED CATALYST SYSTEM FOR THE COPOLYMERIZATION OF ETHYLENE WITH C1-C12 ALPHA-OLEFINS - A novel process for the manufacture of a mixed catalyst system by combining a Ziegler catalyst and a tridentate iron complex is described, which is characterized in that the reaction of a tridentate ligand with an iron compound is performed in an organic solvent containing less than 10 percent by weight, based on the total amount of the organic solvent, of electron donor compounds selected from the group consisting of ethers, aliphatic esters, aromatic esters, tertiary amines, amides, silanes, silazanes or orthoesters. | 03-27-2014 |
20140329978 | PROCESS FOR CONTROLLING THE POLYMER COMPOSITION OF AN ETHYLENE COPOLYMER OBTAINED BY A CATALYST SYSTEM COMPRISING A TRANSITION METAL CATALYST COMPONENT AND A 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
| 11-06-2014 |
20150018501 | METAL CYANIDE COMPLEX CATALYST AND ITS PREPARATION AND APPLICATION - A metal cyanide complex catalyst and its preparation and application are disclosed. The formula of this catalyst is M | 01-15-2015 |