Basell Polyolefine GmbH Patent applications |
Patent application number | Title | Published |
20160130376 | POLYMERIZATION PROCESS IN THE PRESENCE OF AN ANTISTATIC COMPOSITION - A process for the preparation of polyolefins by polymerizing olefins at temperatures of from 20 to 200° C. and pressures of from 0.1 to 20 MPa in the presence of a polymerization catalyst and an antistatically acting composition in a polymerization reactor, wherein the antistatically acting composition is a mixture comprising an oil-soluble surfactant and water and the use of an antistatically acting composition comprising an oil-soluble surfactant and water as antistatic agent for the polymerization of olefins at temperatures of from 20 to 200° C. and pressures of from 0.1 to 20 MPa in the presence of a polymerization catalyst. | 05-12-2016 |
20160108148 | PROCESS FOR THE GAS-PHASE POLYMERIZATION OF ETHYLENE OR ETHYLENE MIXTURES - A process for the gas-phase polymerization of ethylene or a mixture of ethylene and one or more 1 olefins in the presence of a polymerization catalyst system comprising the steps
| 04-21-2016 |
20160108147 | MULTISTAGE PROCESS FOR THE POLYMERIZATION OF OLEFINS - A process for polymerizing olefins in at least two serially connected gas-phase polymerization reactors, the process for transferring polyolefin particles from a first gas-phase polymerization reactor to a second gas-phase polymerization reactor comprising the steps of:
| 04-21-2016 |
20150274947 | POLYETHYLENE COMPOSITION HAVING HIGH MECHANICAL PROPERTIES - Polyethylene composition with improved balance of environmental stress cracking resistance (FNCT) and impact resistance (Charpy), particularly suited for preparing pipes, said composition having the following features:
| 10-01-2015 |
20140336327 | POLYOLEFIN MASTERBATCH BASED ON GRAFTED POLYPROPYLENE AND METALLOCENE CATALYZED POLYPROPYLENE - The present disclosure provides masterbatch compositions comprising a polypropylene grafted with a grafting monomer selected from maleic anhydride, acrylic acid or other acid or anhydride functional groups that could be grafted to a polypropylene backbone and a metallocene catalyzed polypropylene base resin. Additionally, the present disclosure provides a polymer composition which includes from 0.1 to 10.0 wt. % of the masterbatch composition, and from 50 to 90% of a third polypropylene, and from 5 to 45% of a filler. | 11-13-2014 |
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 |
20140309384 | MULTISTAGE PROCESS FOR THE POLYMERIZATION OF OLEFINS - Process for transferring polyolefin particles from a first gas-phase polymerization reactor to a second gas-phase polymerization reactor in a multistage polymerization of olefins carried out in at least two serially connected gas-phase polymerization reactors, | 10-16-2014 |
20140243475 | POLYETHYLENE PROCESSES AND COMPOSITIONS THEREOF - Embodiments of the present disclosure relate to a method of preparing polyethylene compositions comprising polymerizing ethylene in a first gas-phase reactor and polymerizing ethylene in a second gas-phase reactor in the presence of hydrogen; wherein at least one of the first or second gas-phase reactors comprises a first and second polymerization zone; wherein a hydrogen pressure of the first and second polymerization zones are different such that at least a portion of the second ethylene cycles through the first and second polymerization zones and a gas mixture of each polymerization zone is partially or totally prevented from entering the other zone. | 08-28-2014 |
20140145376 | PROCESS FOR HOMOGENIZING AND PELLETIZING A POLYETHYLENE COMPOSITION - A process for homogenizing and pelletizing a polyethylene composition comprising the steps of
| 05-29-2014 |
20140114038 | METHOD AND APPARATUS FOR DISCHARGING A POLYMER FROM A GAS-PHASE REACTOR - Process for discharging polyolefin particles from a gas-phase polymerization reactor of a pressure from 1.0 MPa to 10 MPa to a discharge vessel of a pressure from 0.1 MPa to 1.0 MPa wherein the discharging is carried out discontinuously through at least two discharge lines in which the polyolefin particles are transported horizontally or upwards, process for polymerizing olefins at temperatures of from 30° C. to 160° C. and pressures of from 1.0 MPa to 10 MPa in the presence of a polymerization catalyst in a gas-phase polymerization reactor comprising discharging the obtained polyolefin particles from the gas-phase polymerization reactor by the process for discharging polyolefin particles and apparatus for polymerizing olefins in the gas-phase comprising a polymerization reactor, a discharge vessel and at least two pipes connecting the polymerization reactor and the discharge vessel for discharging polyolefin particles, wherein the discharge lines are constructed in a way that the polyolefin particles conveyed from the polymerization reactor to the discharge vessel are transported horizontally or upwards. | 04-24-2014 |
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 |
20140045988 | NOVEL POLYMER COMPOSITION FOR USE IN BLOW MOULDING - A novel polymer composition is described comprising ethylene homopolymers and/or copolymers of ethylene with C | 02-13-2014 |
20130333832 | PROCESS FOR PREPARING ETHYLENE HOMOPOLYMERS OR COPOLYMERS IN A TUBULAR REACTOR WITH AT LEAST TWO REACTION ZONES HAVING DIFFERENT CONCENTRATIONS OF CHAIN TRANSFER AGENT - Process for preparing ethylene homopolymers or copolymers in the presence of free-radical polymerization initiator and at least one chain transfer agent at pressures in the range of from 110 MPa to 350 MPa and temperatures in the range of from 100° C. to 350° C. in a tubular reactor with at least two reaction zones having different concentrations of the chain transfer agent, wherein the concentration of the chain transfer agent in the first reaction zone is less than 70% of the concentration of the chain transfer agent in the reaction zone with the highest concentration of the chain transfer agent, ethylene homopolymers or copolymers obtainable by such a process, the use of the ethylene homopolymers or copolymers for extrusion coating and a process for extrusion coating a substrate selected from the group consisting of paper, paperboard, polymeric film, and metal, with such ethylene homopolymers or copolymers. | 12-19-2013 |
20130317185 | POLYETHYLENE POLYMERISATION IN GAS PHASE REACTOR - A novel gas phase polymerisation method is devised, for polymerisation of low and ultralow density polyethylene. | 11-28-2013 |
20130313266 | METHOD TO IMPROVE THE BARRIER PROPERTIES OF COMPOSITE GAS CYLINDERS AND HIGH PRESSURE GAS CYLINDER HAVING ENHANCED BARRIER PROPERTIES - Method to improve the barrier properties of composite gas cylinders and high pressure gas cylinder having enhanced barrier properties. | 11-28-2013 |
20130306652 | METHOD TO IMPROVE THE BARRIER PROPERTIES OF COMPOSITE GAS CYLINDERS AND HIGH PRESSURE GAS CYLINDER HAVING ENCHANCED BARRIER PROPERTIES - Method to improve the barrier properties of composite gas cylinders and high pressure gas cylinder having enhanced barrier properties | 11-21-2013 |
20130295289 | Process for the Preparation of Ethylene Copolymers in the Presence of Free-Radical Polymerization Initiator by Copolymerizing Ethylene, a Bi- or Multifunctional Comonomer and Optionally Further Comonomers - Process for preparing ethylene copolymers in the presence of free-radical polymerization initiator at pressures in the range of from 160 MPa to 350 MPa and temperatures in the range of from 100° C. to 350° C. in a tubular reactor by copolymerizing ethylene, a bi- or multifunctional comonomer and optionally further comonomers, wherein the bi- or multifunctional comonomer bears at least two different functional groups, of which at least one is a unsaturated group, which can be incorporated into the growing polymer chain, and at least another functional group can act as chain transfer agent in radical ethylene polymerization, ethylene copolymers obtainable by such a process, the use of the ethylene copolymers for extrusion coating and a process for extrusion coating a substrate selected from the group consisting of paper, paperboard, polymeric film, and metal, with such ethylene copolymers. | 11-07-2013 |
20130274424 | PROCESS FOR MONITORING THE POLYMERIZATION OF ETHYLENE OR ETHYLENE AND COMONOMERS IN A TUBULAR-REACTOR AT HIGH-PRESSURES - Process for monitoring the polymerization of ethylene or ethylene and comonomers in the presence of free-radical polymerization initiator at pressures in the range of from 160 MPa to 350 MPa and temperatures in the range of from 100° C. to 350° C. in a tubular reactor with one or more reaction zones, which is equipped with cooling jackets for cooling the tubular reactor with a cooling medium, comprising the steps of a) measuring as process parameters the temperature profile and the pressure of the reaction medium and the flow and temperature profile of the cooling medium along the reactor, b) monitoring the feeds of ethylene, if present comonomer, free-radical polymerization initiator and chain-transfer agent to all reaction zones, c) calculating, based on the measured process parameters and on a model for the polymerization process, concentrations for free-radical polymerization initiator, chain-transfer agent, ethylene and, if present, comonomers at at least so many positions along the reactor, that at least one calculation is carried out all 10 s for a volume unit flowing through the reactor, d) calculating, based on the measured process parameters and the calculated concentrations, the cooling power, the generation of heat, and the concentration of radicals, e) calculating, based on the calculated data of the cooling power, of the generation of heat, and of the concentration of radicals, the potential of a thermal runaway of the reaction mixture at the positions along the reactor which have the highest temperatures, and f) outputting an alarm signal if the calculated value for the potential of a thermal runaway exceeds a predefined value and process for polymerizing ethylene or ethylene and comonomers comprising such a monitoring process. | 10-17-2013 |
20130273291 | POLYPROPYLENE COMPOSITION WITH HIGH ELASTICITY AND TRANSPARENCY - A propylene polymer composition comprising (percent by weight referring to the sum of A+B): A) 60%-90% of a crystalline propylene copolymer containing from 1.0% to 5.0% of ethylene derived units; B) 10%-40% of a copolymer of propylene with from 18% to 32% of ethylene derived units, said propylene polymer composition having a melt flow rate value according to ISO 1133 (230° C., 2.16 kg) of from 1.0 to 2.0 g/10 min. | 10-17-2013 |
20130267407 | METHOD OF PREPARING METALLOCENE CATALYSTS - Methods of preparing silica-supported catalysts useful for olefin polymerization are described. The catalysts comprise a metallocene complex. An activator mixture made from a boron acid compound and methylalumoxane is combined with either: (i) the metallocenecomplex, followed by calcined or chemically treated silica to give a supported catalyst; or (ii) calcined or chemically treated silica, followed by the metallocenecomplex to give a supported catalyst. The methods provide active supported catalysts. | 10-10-2013 |
20130245209 | METHOD FOR ACTIVATION OF CHROMIUM CONTAINING CATALYST PRECURSOR FOR POLYMERIZATION AND THE RESULTING POLYMERIZATION CATALYST - Method for activation of chromium containing catalyst precursor for polymerization and improved polymerization catalyst resulting The instant invention relates to an activation of a polymerization catalyst precursor by heat treatment comprising a support material and a catalyst precursor deposited thereon in a fluidized bed activator and to the use of the activated polymerization catalyst in the manufacture of polyolefins. The Method is performed in a cylindrical activator ( | 09-19-2013 |
20130243990 | NOVEL TRIMODAL POLYETHYLENE FOR USE IN BLOW MOULDING - A novel polyethylene formed by Ziegler catalyst is devised, for use in blow moulding. | 09-19-2013 |
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 |
20130158213 | PROCESS FOR THE PREPARATION OF A POLYOLEFIN POLYMER WITH IMPROVED WAX DEPOSITION - Process for the preparation of a polyolefin polymer by continuously polymerizing one or more olefin monomers in suspension at temperatures of from 40° C. to 120° C. and pressures of from 0.1 to 10 MPa in the presence of a polymerization catalyst in at least one polymerization reactor, comprising a) withdrawing a suspension of solid polyolefin particles in a suspension medium from the polymerization reactor, wherein the suspension has a temperature of from 65° C. to 120° C.; b) feeding the suspension withdrawn from the polymerization reactor to a moderating vessel; c) keeping the suspension in the moderating vessel at a temperature of from 60° C. to 85° C. for a time sufficiently long that the mean residence time of the suspension in the moderating vessel is at least 5 min; d) withdrawing suspension from the moderating vessel; e) cooling the suspension withdrawn from the moderating vessel to a temperature of from 20° C. to 55° C.; and f) mechanically separating the solid polyolefin particles from the liquid suspension medium, and method for controlling the content of hydrocarbons with from 14 to 300 carbon atoms in a polyolefin polymer prepared by polymerizing one or more olefin monomers in suspension. | 06-20-2013 |
20130131300 | PROCESS AND APPARATUS FOR MIXING AND SPLITTING FLUID STREAMS - A process for continuously mixing at least two fluid streams and splitting the stream of the mixture into at least two partial streams, comprising a) providing streams of the at least two fluids via separated conduits; b) combining the streams of the fluids and forming a homogeneous mixture; c) measuring the pressure in the conduit conveying the mixture of the fluids; d) splitting the stream of the mixture of the fluids into at least two partial streams and feeding each of the partial streams to a conduit equipped with a flow control device controlled by a controller; and e) adjusting the flow rates of the partial streams of the mixture of the fluids by feeding the pressure information measured in step c) as process variable to the controllers controlling the flow control devices, a process for feeding a mixture of at least two fluids via at least two feeding points, an apparatuses for carrying out such processes and a process for polymerizing olefins. | 05-23-2013 |
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 |
20130085243 | Catalyst Components For the Polymerization of Olefins and Catalysts Therefrom Obtained - A catalyst component for the polymerization of olefins obtained by: | 04-04-2013 |
20130072652 | Process for preparing a supported catalyst system for olefin polymerization, the catalyst system and its use - The invention refers to a process for preparing a supported catalyst system for the polymerization of olefins comprising at least one active catalyst component on a support, the process comprising
| 03-21-2013 |
20130064995 | Polymer Filament or Fiber - A polymer filament or fiber comprising a polyethylene material (I) having the following features:
| 03-14-2013 |
20130025778 | Multistage Process for Producing Hollow Plastic Articles From Half Shells - The present invention relates to a multistage process for producing hollow plastic articles, encompassing the following steps:
| 01-31-2013 |
20120328502 | Preparation of Metal Oxide Nanotubes - The present invention relates to a preparation process for metal oxide nanotubes, the SiO | 12-27-2012 |
20120322956 | Process for the preparation of ethylene homopolymers or copolymers in a high-pressure reactor controlled by a model based predictive controller - Process for the preparation of ethylene homopolymers or copolymers in the presence of free-radical polymerization initiator at from 100° C. to 350° C. and pressures in the range of from 160 MPa to 350 MPa in a high-pressure polymerization unit comprising a high-pressure reactor with one or more reaction zones, to each of which free-radical polymerization initiator is fed, which is controlled by a model based predictive controller carrying out the steps a) feeding target values for density and melt flow rate (MFR) of the ethylene homopolymer to be prepared as setpoint ranges to the controller if an ethylene homopolymers is prepared or feeding target values for density, MFR and copolymer composition of the ethylene copolymer of to be prepared as set-point ranges to the controller if an ethylene copolymer is prepared; b) measuring data in the high-pressure polymerization unit and calculating by means of a model based on these data a value for the density of the ethylene homopolymer or copolymer currently prepared in the high-pressure reactor; c) independently of step b), measuring data in the high-pressure polymerization unit and calculating by means of a model based on these data a value for the MFR of the ethylene homopolymer or copolymer currently prepared in the high-pressure reactor; d) if an ethylene copolymer is prepared, independently of steps b) and c), measuring data in the high-pressure polymerization unit and calculating by means of a model based on these data a value for the copolymer composition of the ethylene copolymer currently prepared in the high-pressure reactor, e) feeding the calculated values for the density, for the MFR and, if an ethylene copolymer is prepared, for the copolymer composition as controlled variables to the controller; and f) measuring data in the high-pressure polymerization unit and calculating by means of the controller based on these measured data, the setpoint ranges fed in step a) and the values calculated in steps b), c) and d) as outputs setpoint ranges for manipulated variables of the high-pressure polymerization unit including setpoint ranges for feeding the free-radical polymerization initiator, wherein the calculation of the setpoint ranges for feeding the free-radical polymerization initiator is repeated at least every 3 minutes, method of controlling a process for the preparation of ethylene homopolymers or copolymers in a high-pressure reactor and method for transitioning from one grade to another in a process for the preparation of ethylene homopolymers or copolymers in a high-pressure reactor. | 12-20-2012 |
20120283400 | Process for the Preparation of Supported Catalysts - The present invention refers to a process for the preparation of supported catalysts for the polymerization of olefins comprising at least a late transition metal complex, wherein the process comprises two steps. In the first step a catalytically active component comprising at least one late transition metal complex, optionally in the presence of one or more cocatalysts is mixed with a support; and in the second step the obtained mixture is treated at a reduced pressure under a flow of inert gas at a temperature equal to or below 40° C. to obtain a supported catalyst. The method is especially useful for the preparation of dual supported catalysts, useful in the gas-phase polymerization of olefins. | 11-08-2012 |
20120283396 | Process for the preparation of a multimodal polyolefin polymer with improved hydrogen removal - Process for the preparation of a multimodal polyolefin polymer at temperatures of from 40 to 150° C. and pressures of from 0.1 to 20 MPa in the presence of a polymerization catalyst in a first and a second polymerization reactor connected in series, wherein further polymerization reactors can be connected to said reactors upstream or downstream of said reactors, in which in the first polymerization reactor a first polyolefin polymer is prepared in suspension in the presence of hydrogen and in the second polymerization reactor a second polyolefin polymer is prepared in the presence of a lower concentration of hydrogen than in the first polymerization reactor, comprising
| 11-08-2012 |
20120283369 | Polymerization process in the presence of an antistatic agent - Process for the polymerization of olefins at temperatures of from −20 to 200° C. and pressures of from 0.1 to 20 MPa in the presence of a polymerization catalyst and an antistatic agent, wherein
| 11-08-2012 |
20120264895 | CATALYST COMPONENTS FOR THE POLYMERIZATION OF OLEFINS AND CATALYSTS THEREFROM OBTAINED - A catalyst component for the polymerization of olefins comprising Mg, Ti and Cl obtained by a process comprising the following steps:
| 10-18-2012 |
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 |
20120220738 | HIGH PRESSURE LDPE FOR MEDICAL APPLICATIONS - A novel LDPE from radical, high pressure polymerization is devised. | 08-30-2012 |
20120214926 | Novel Trimodal Polyethylene for use in Blow Moulding - A novel polyethylene formed by Ziegler catalyst is devised, for use in blow moulding. | 08-23-2012 |
20120208968 | CATALYST COMPONENTS FOR THE POLYMERIZATION OF OLEFINS AND CATALYSTS THEREFROM OBTAINED - A catalyst component for the polymerization of olefins obtainable by:
| 08-16-2012 |
20120189772 | Process for preparing a polyolefin pipe having inherent resistance to thermooxidative degradation - A process for producing a pipe having improved resistance to thermooxidative degradation, the process comprising melting a polyolefinic molding composition in an extruder, extruding the molten molding composition through an annular die and subsequently cooling it, wherein the inner surface of the pipe is exposed to the action of a halogen-comprising treatment gas before or after cooling. | 07-26-2012 |
20120149834 | Polyethylene for Rotomoulding - A novel polyethylene is devised which polyethylene is particularly advantageous for manufacturing rotomoulded articles. | 06-14-2012 |
20120148892 | Housing for Electrical Power Cells in Electrically Driven Automotive Vehicles - A housing suitable to comprise multiple electrical power cells in electrically driven motor vehicles comprises at least one lower receiving part and one upper covering part. Both parts fit together and create inside a hollow space. Both parts are prepared from a multilayered material comprising at least one support layer of thermoplastic polymer and at least one cover layer of metal adhering to each other. Such housing is perfectly suitable to protect the power cells inside against mechanical damage and against the influence of fire and/or electromagnetic radiation. | 06-14-2012 |
20120148777 | Polyethylene for Rotomoulding - A novel polyethylene is devised which polyethylene is particularyl advantageous for manufacturing rotomoulded articles. | 06-14-2012 |
20120148776 | Polyethylene for Rotomoulding - A novel polyethylene is devised which polyethylene is particularly advantageous for manufacturing rotomoulded articles. | 06-14-2012 |
20120142874 | Organometallic Transition Metal Compound, Catalyst System and Preparation of Polyolefins - The present invention relates to non-symmetrical organometallic transition metal compounds of the compound of the formula (I) | 06-07-2012 |
20120142873 | CATALYST COMPONENT FOR THE POLYMERIZATION OF OLEFINS - A solid catalyst component comprising the product of a process comprising (a) reacting a magnesium alcoholate of formula Mg(OR | 06-07-2012 |
20120141714 | METHOD TO IMPROVE THE BARRIER PROPERTIES OF ETHYLENE POLYMER AGAINST PERMEATION OF HYDROCARBONS AND PLASTIC FUEL TANK HAVING IMPROVED BARRIER PROPERTIES - A method for the improvement of the barrier properties of ethylene homo- or copolymer compositions against permeation of hydrocarbons comprised in liquid fuels or mineral oils is disclosed. The ethylene homo- or copolymer comprises at least one sterically hindered amine compound in an amount of from 100 to 10 000 ppm, calculated on total weight of the polymer. At least one surface of a hollow body made of said ethylene homo- or copolymer is subjected to fluorination. | 06-07-2012 |
20120108766 | Polyethylene Composition and Finished Products Made Thereof - Novel polyethylenes having defined molecular weight distribution and LCB structure are devised, for films or mouldings. | 05-03-2012 |
20120108752 | Polyethylene Moulding Composition - A novel polyethylene composition is described. The composition is suitable for manufacturing especially stretched bands or tapes, also coined raffia in the art. | 05-03-2012 |
20120065335 | Polyethylene composition suitable for the preparation of films and process for preparing the same - A polyethylene composition, in particular suitable for the preparation of films, and a process for preparing the same are described. The polyethylene composition of the invention comprises from 50 to 89% by weight of a first polyethylene component comprising at least one multimodal polyethylene including a plurality of ethylene polymer fractions having distinct molecular weights and comonomer contents, at least one of said plurality of ethylene polymer fractions being prepared by the use of a single site catalyst, and from 50 to 11% by weight of a second polyethylene component comprising a low or medium density polyethylene. | 03-15-2012 |
20120064269 | Multilayered Composite Plastic Material Containing an Adhesion Promoter Interlayer - A multilayered composite structure comprises at least one layer (A) consisting of an ethylene homopolymer or copolymer, at least one layer (B) comprising a barrier material and at least one layer (C) comprising an adhesion promoter material serving to improve the adhesion between these layers, wherein the adhesion promoter material comprises an adhesive polymer composition comprising a) 20 to 95% (w/w) of an ethylene homo- or copolymer which is a copolymer of ethylene with C3-C20-alkene, and b) 5 to 80% (w/w) of a polar copolymer of ethylene with at least one comonomer which comonomer is selected from the group consisting of an acrylate and acrylic acid. The composite structure can be used for fuel containers, especially fuel tanks in automotive vehicles. | 03-15-2012 |
20120031495 | Thermoplastic Polymeric Composition with Improved Resistance to Thermo-Oxidative Degradation and Use Thereof for Producing Pipes - A polyolefinic moulding composition is suitable for producing pipes with improved resistance to thermo-oxidative degradation when these pipes are in extended contact with liquids which contain disinfectants with an oxidative action. Beside thermoplastic polyolefins, the moulding composition additionally contains specific aromatic amines which are liquid under standard conditions as an additive. The invention also relates to a pipe made from the moulding composition and to a process for improving the long-term resistance of water pipework made of plastics to damage by disinfectants with an oxidative action from the water by the use of this moulding composition. | 02-09-2012 |
20120010377 | Catalyst System for the Polymerization of Alpha-Olefins - The invention refers to a catalyst system for the polymerization of olefins including a diorganohydroborane molecular weight modifier. By addition of diorganohydroborane to the catalyst system it is possible to control the molecular weight of a polyolefin to higher values. | 01-12-2012 |
20120010374 | Multistage Process for the Polymerization of Ethylene - The present invention relates to a slurry process for preparing an ethylene polymer having a melt flow ratio F/P, according to ASTM 1238, of higher than 25, carried out in two or more stages of polymerization at temperatures in the range from 60 to 120° C., in which at least two of the said two or more polymerization stages are carried out under different concentration of a molecular weight regulator, said process being carried out in the presence of a catalyst system comprising the product obtained by contacting (A) a solid catalyst component comprising Ti, Mg, halogen, and having a porosity (P | 01-12-2012 |
20110318559 | Films having improved mechanical properties - A blown film having a thickness from 8 to 200 μm and dart drop impact DDI of more than 400 g, comprising a polyethylene molding composition having a multimodal molar mass distribution; a density from 0.940 to 0.948 g/cm | 12-29-2011 |
20110313111 | Ethylene Copolymers, Catalyst System and Process for Preparing the Same - An ethylene copolymer, a catalyst system suitable to prepare the ethylene copolymer, and a process to prepare such ethylene copolymer are described. The use of the ethylene copolymer as impact modifier in polyethylene and as compatibilizer in a polymer blend are also described. The ethylene copolymer has a density from 0.855 g/cm | 12-22-2011 |
20110301307 | Ethylene Polymerization in a High Pressure Reactor with Improved Initiator Feeding - Process for the preparation of ethylene homopolymers or copolymers in a high pressure reactor with at least two spatially separated initiator injection points by polymerizing ethylene and optionally further monomers in the presence of at least two different mixtures of free-radical polymerization initiators at from 100° C. to 350° C. and pressures in the range of from 160 MPa to 350 MPa, wherein the process comprises the following steps:
| 12-08-2011 |
20110294975 | Polyethylene Copolymers - A multimodal ethylene copolymer having the following properties:
| 12-01-2011 |
20110294972 | Olefin Polymerization Catalysts - The invention relates to transition metal complexes comprising a metal of group 3, 4, or 6 of the Periodic Table of the Elements and one, or two mono-anionic triazole ligands It has been found that these transition metal complexes which comprise at least one triazole fragment having a substituent with an unsaturated fragment are suitable as precatalysts for the polymerization of olefins. In these complexes one carbon atom of the unsaturated fragment is bound directly or via a bridge to a triazole group and the other carbon atom is bound to the transition metal. The complexes are useful as catalysts for olefin polymerization, a catalyst system comprising these complexes and a process for the polymerization of olefins under the use of the catalyst system. | 12-01-2011 |
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 |
20110294967 | Method for Ethylene Polymerization in a Tubular Reactor with Reduced Output - Process for the preparation of ethylene homopolymers or copolymers in the presence of free-radical polymerization initiators at from 100° C. to 350° C. and pressures in the range of from 160 MPa to 350 MPa in a tubular reactor with at least two spatially separated initiator injection points, wherein injecting initiator rises the temperature of the reaction mixture in the reaction zone following the injection point, and the first initiator injection point of the tubular reactor is not provided with initiator or is provided with so little initiator that the temperature of the reaction mixture does not rise more than 20° C. in the first reaction zone and method for reducing the output of a high pressure tubular reactor for the homo- or copolymerization of ethylene in the presence of free-radical polymerization initiators with at least two initiator injection points, wherein feeding of free-radical polymerization initiator to the first initiator injection point is discontinued or reduced to a level that the temperature of the reaction mixture in the first reaction zone does not rise more than 20° C. | 12-01-2011 |
20110294957 | Method for Transitioning Between Incompatible Olefin Polymerization Catalyst Systems - A method for transitioning from a Ziegler-Natta to a Phillips catalyst system for the olefin polymerization reaction in one reactor, preferably a gas phase reactor, is described. The method comprises the steps of a) discontinuing a first olefin polymerization reaction performed in the presence of the Ziegler-Natta catalyst system; b) performing a second olefin polymerization reaction in the presence of a further catalyst system comprising catalyst components (A) and (B) producing, respectively, a first and a second polyolefin fraction, wherein the M | 12-01-2011 |
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 |
20110281722 | Catalyst composition for preparation of polyethylene - Catalysts suitable for preparation of a polyethylene which comprises ethylene homopolymers and/or copolymers of ethylene with 1-alkenes and has a molar mass distribution width M | 11-17-2011 |
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 |
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 |
20110223406 | Impact Resistant LLDPE Composition and Films Made Thereof - A novel PE material is devised showing excellent mechanical/optical properties and process ability, e.g. for film extrusion. The polyethylene of the invention is produced in one single e.g. gas phase reactor. | 09-15-2011 |
20110218309 | Preparation of ultra high molecular mass polyethylene and ultra high molecular mass polyethylene having improved crosslink ability prepared thereb - The invention pertains to a method for the preparation of ultra high molecular mass polyethylene by polymerization in suspension or in gas phase in the presence of a chromium catalyst sitting on an alumosilicate support material. The chromium catalyst has been subjected to a fluorinating treatment and the polymerization is performed under low temperature conditions within a temperature range of from 50 to 100° C. The invention pertains also to ultra high molecular mass polyethylene prepared by that method and having a density in the range of from 0.930 to 0.950 g/cm | 09-08-2011 |
20110217537 | Impact Resistant LLDPE Composition and Films Made Thereof - A novel PE material is devised showing excellent mechanical/optical properties and process ability, e.g. for film extrusion. The polyethylene of the invention is produced in one single e.g. gas phase reactor. | 09-08-2011 |
20110217500 | Injection Stretch Blow-Molding Process for the Preparation of Polyethylene Containers, Preform and Bottle - Injection stretch blow-molding process for the preparation of polyethylene containers wherein use is made, as the polyethylene material, of an ethylene (co)polymer having density equal to or greater than 0.945 g/cm | 09-08-2011 |
20110217499 | Polyethylene for Injection Moldings - A polyethylene for IM having excellent processing properties in terms of spiral flow testing is devised. | 09-08-2011 |
20110212315 | Impact Resistant LLDPE Composition and Films Made Thereof - A novel PE material is devised showing excellent mechanical/optical properties and process ability, e.g. for film extrusion. The polyethylene of the invention is produced in one single e.g. gas phase reactor. | 09-01-2011 |
20110212283 | Impact Resistant LLDPE Composition and Films Made Thereof - A novel PE material is devised showing excellent mechanical/optical properties and process ability, e.g. for film extrusion. The polyethylene of the invention is produced in one single e.g. gas phase reactor. | 09-01-2011 |
20110192487 | Polyethylene Pipes - A new polymeric composition of extruded conduits and pipes is described, which is free of fluoroelastomer processing additive whilst maintaining superior processability. | 08-11-2011 |
20110172362 | Process for preparing a polyethylene molding composition - The invention relates to a polyethylene molding composition having a multimodal molar mass distribution particularly suitable for blow molding films having a thickness in the range from 8 to 200 μm. The molding composition has a density at a temperature of 23° C. in the range from 0.948 to 0.953 g/cm | 07-14-2011 |
20110171450 | Process for preparing a blown film from a polyethylene molding composition - The invention relates to a polyethylene molding composition having a multimodal molar mass distribution particularly suitable for blow molding films having a thickness in the range from 8 to 200 μm. The molding composition has a density at a temperature of 23° C. in the range from 0.948 to 0.953 g/cm | 07-14-2011 |
20110160361 | ETHYLENE POLYMER HAVING IMPROVED RESISTANCE AGAINST THERMOOXIDATIVE DEGRADATION IN THE PRESENCE OF LIQUID FUELS COMPRISING BIODIESEL AND OXYGEN AND PLASTIC FUEL TANK MADE OF IT - An ethylene homo- or copolymer composition is stabilized by suitable stabilizers conferring improved resistance against thermo-oxidative degradation, which occurs in the presence of liquid fuels comprising biodiesel, such as vegetable oil esters, in combination with oxygen. The stabilizers comprise a combination of at least two sterically hindered amine compounds or N-hydroxy- or N-oxylderivatives thereof in an amount of from 100 to 10 000 ppm. Such ethylene homo- or copolymer composition is highly suitable for articles of plastic and components for the transport and storage of liquid fuels comprising biodiesel, such as vegetable oil esters, preferably for plastic fuel tanks for automotive vehicles. | 06-30-2011 |
20110045295 | ADHESIVE POLYMER COMPOSITION - A novel adhesive composition suitable for composing multilayered coatings onto large, industrial equipment such as pipeline tubes is devised. The composition is a blend based on a polyethylene which determines the blend's favorable properties, which polyethylene itself can be used further in coating cables and for producing mouldings, especially rotomoulded articles. | 02-24-2011 |
20110003948 | MULTISTAGE PROCESS FOR THE POLYMERIZATION OF OLEFINS - A multistage process for the homo or copolymerization of ethylene carried out in the presence of a catalyst system comprising at least one polymerization catalyst (A) based on a late transition metal component having a tridentate ligand which bears at least two ortho.ortho-disubstituted aryl radicals, at least one Ziegler polymerization catalyst (B), and at least a Lewis acid activating compound (C), wherein the molar ratio of the metal of the activating compound (C) to the late transition metal of catalyst (A) is different in the two polymerizations steps. Catalysts (A) and (B) may be selectively controlled by varying the amount of activating compound (C). | 01-06-2011 |
20100331502 | GAS-PHASE PROCESS FOR THE POLYMERIZATION OF ALPHA-OLEFINS - A continuous gas-phase process for the polymerization of alpha-olefins, in particular ethylene, comprising passing an alpha-olefin monomer stream through an oil filter in order to reduce the amount of oil to less than 8 ppm, and polymerizing the thus purified monomer feed in gas-phase reactor; the reduction of the amount of oil improves the operability of the plant over time. | 12-30-2010 |
20100317755 | Process For Preparation Of Ethylene Polymers For Blown Films - Process for preparation of ethylene homopolymers or copolymers, comprising the steps of a) polymerization of ethylene or of ethylene with one or more other 1-olefins in the presence of a chromium catalyst at temperatures of from 20 to 200° C. and at pressures of from 0.1 to 20 MPa, where the chromium catalyst can be prepared via application of one or more chromium compounds to a silicate support and subsequent thermal activation under oxidative conditions at temperatures of from 620 to 900° C.; b) mixing of the polyethylene in the melt in the presence of from 1000 to 2000 ppm of an antioxidant comprising at least one sterically hindered phenol and comprising at least one phosphite in a mixing ratio of from 1:5 to 5:1, with specific energy input of at least 0.17 kWh/kg. | 12-16-2010 |
20100301054 | POLYETHYLENE MOLDING COMPOSITION FOR PRODUCING HOLLOW CONTAINERS BY THERMOFORMING AND FUEL CONTAINERS PRODUCED THEREWITH - The present invention relates to a polyethylene molding composition which has a multimodal molar mass distribution and is particularly suitable for thermoforming to produce fuel containers having a capacity in the range from 20 to 200 I. The molding composition has a density at a temperature of 23° C. in the range from 0.948 to 0.953 g/cm | 12-02-2010 |
20100298501 | ETHYLENE TERPOLYMERS - A copolymer of ethylene, a catalyst system suitable to prepare the copolymer, and a process to prepare such copolymer are described. The copolymer comprises from 60 to 80% by weight of ethylene and from 20 to 40% by weight of at least one first α-olefin comonomer having n carbon atoms and at least one second α-olefin comonomer having (n−1) carbon atoms, n being from 4 to 13, has a polydispersity M | 11-25-2010 |
20100267910 | CATALYST SYSTEM FOR OLEFIN POLYMERIZATION COMPRISING PHENANTHROLINE-COMPRISING IRON COMPLEXES - Catalyst system for olefin polymerization comprising (a) at least one phenanthroline-comprising iron complex, (b) an organic or inorganic support, (c) optionally one or more activators, (d) optionally one or more metal compounds of group 1, 2 or 13 of the Periodic Table and (e) optionally further catalysts suitable for olefin polymerization, and also their use in the polymerization of olefins. | 10-21-2010 |
20100267901 | PROCESS FOR OBTAINING POLYMERS OF ETHYLENE AND CYCLOOLEFINS - A terpolymer containing:
| 10-21-2010 |
20100249346 | METALLOCENE COMPOUNDS BASED ON ETHANEDIYL-BRIDGED INDENE AND CYCLOPENTADITHIOPHENE LIGANDS - A metallocene compound of formula (I) | 09-30-2010 |
20100249345 | PROCESS FOR THE PREPARATION OF CATALYST PASTE AND PRODUCTS THEREOF - A process for the preparation of a catalyst paste comprising the following steps:
| 09-30-2010 |
20100247250 | PROCESS FOR FEEDING A CATALYST IN A POLYMERIZATION REACTOR - A process for introducing a catalyst powder into a polymerization reactor comprising: | 09-30-2010 |
20100234548 | PHENANTHROLINE-COMPRISING COMPLEXES - Phenanthroline-comprising complexes and catalyst systems obtained therefrom, and also their use in the polymerization of olefins. | 09-16-2010 |
20100222601 | SYNTHESIS OF CYCLOPENTADIENE DERIVATIVES - A process for preparing cyclopentadiene derivatives having formula (I) | 09-02-2010 |
20100144988 | Monomodal Copolymer of Ethylene for Injection Molding and Process for its Preparation - Monomodal copolymers of ethylene and molding compositions comprising such copolymers, wherein the copolymers have a density determined according to DIN EN ISO 1183-1, variant A in the range from 0.938 to 0.944 g/cm | 06-10-2010 |
20100137543 | 1-BUTENE ETHYLENE COPOLYMERS - A 1-butene ethylene copolymer having an ethylene derived units content ranging from 15.10% by molto 18.00% by mol having the following properties: a) distribution of molecular weight lower than 3; preferably b) hardness shore A (measured according to ISO 868) lower than 65; c) tension set lower than 30% at 100% of deformation (ISO 2285) d) no melting pointdetectable at the DSC; e) Melting enthalpy measured after 10 days of aging at room temperature comprised between 4 and 15 J/g. | 06-03-2010 |
20100130708 | Method of Controlling the Relative Activity of the Different Active Centers of Hybrid Catalysts - Method of preparing olefin polymers, which comprises the polymerization of at least one α-olefin in the presence of a hybrid catalyst to produce a polymer comprising at least a higher molecular weight polymer component and a lower molecular weight polymer component in the presence of water in an amount of from 2 to 100 mol ppm and/or carbon dioxide in an amount of from 2 to 100 mol ppm, in each case based on the total reaction mixture, in order to alter the ratio of the higher molecular weight polymer component to the lower molecular weight polymer component. This enables the ratio of the higher molecular weight component to the lower molecular weight component to be controlled selectively. | 05-27-2010 |
20100121015 | 1-BUTENE PROPYLENE COPOLYMER COMPOSITIONS - A 1-butene/propylene copolymer composition having a content of propylene derived units from 4 to 10% by weight, wherein at least 50% of the polymer is present in the thermodynamically stable, trigonal form 1 after 100 hours at room temperature, said composition comprising:
| 05-13-2010 |
20100121011 | 1-BUTENE PROPYLENE COPOLYMER COMPOSITIONS - A 1-butene/propylene copolymer composition having a content of propylene derived units from 1 to 4% by weight, wherein at least 50% of the crystalline polymer is present in the thermodynamically stable, trigonal Form I (detected by DSC analysis) after 100 hours of the first melting at room temperature comprising: b) from 5% by weight to 95% by weight of an atactic 1-butene propylene copolymer having the following features: i) distribution of molecular weight Mw/Mn equal to or lower than 4; ii) no enthalpy of fusion detectable at a differential scanning calorimeter (DSC); and iii) infrared crystallinity lower than 0.5%; b) from 5% by weight to 95% by weight of an isotactic 1-butene propylene copolymer having the following features: isotactic pentads (mmmm) measured by C-NMR, higher than 80%; i) ii) melting point (Tm(II)) higher than 70° C.; and iii) distribution of molecular weight Mw/Mn equal to or lower than 4. | 05-13-2010 |
20100119753 | Polylefin Pipe Having Inherent Resistance To Thermooxidative Degradation - The invention relates to a plastic pipe having improved resistance to thermooxidative degradation when this pipe is in long-term contact with liquids which comprise disinfectants having an oxidizing action. To achieve this, the pipe according to the invention has a fluorine coating on its inner surface. | 05-13-2010 |
20100119567 | INSECTICIDAL COMPOSITION AND ARTICLES OBTAINED THEREOF - A material having insecticidal and acaricidal properties comprising:
| 05-13-2010 |
20100093956 | POLYETHYLENE AND CATALYST COMPOSITION AND PROCESS FOR THE PREPARATION THEREOF - The invention relates to a bimodal or multimodal polyethylene which comprises ethylene homopolymers and/or copolymers of ethylene with α-olefins, has a polydispersity index Mw/Mn of the low molecular weight component of less than 10 and can be prepared using a polymerization catalyst based on a Ziegler component and a late transition metal component having a tridentate ligand which bears at least two ortho,ortho-disubstituted aryl radicals and also a catalyst system and a process for preparing the polyethylene and also fibers, moldings, films and polymer blends comprising this material. | 04-15-2010 |
20100093953 | POLYETHYLENE, PROCESS AND CATALYST COMPOSITION FOR THE PREPARATION THEREOF - A multimodal polyethylene having an inverse comonomer distribution, as well as a process carried out in a single reactor in the presence of a mixed catalyst composition comprising two different polymerization catalysts, are described. The multimodal polyethylene has a density of 0 915-0 970 g/cm | 04-15-2010 |
20100090181 | FLEXIBLE AND/OR RIGID PHOTOCHROMIC ITEMS FOR PACKAGING ITEMS SENSITIVE TO LIGHT - Use for packaging items sensitive to light of a polymer composition in the form of film or moulded articles comprising a polymeric resin and one or more photochromic additive. | 04-15-2010 |
20100087607 | IRON COMPLEXES AND THEIR USE IN POLYMERIZATION PROCESSES - Specific iron complexes (A), a catalyst system for polymerization of olefins comprising at least one metal complex (A) and/or (A′), a prepolymerized catalyst system, the use of these catalyst systems for the polymerization of olefins, and a process for the preparation of polyolefins by polymerization or copolymerization of olefins in the presence of one of the described catalyst systems. | 04-08-2010 |
20100076136 | MULTIMODAL POLYETHYLENE MOLDING COMPOSITION FOR PRODUCING PIPES HAVING IMPROVED MECHANICAL PROPERTIES - The sagging problem in the manufacture of thick walled pipes is solved using a polyethylene molding composition having a multimodal molecular mass distribution and comprising from 45 to 55% by weight of a first low molecular weight ethylene homopolymer A, from 20 to 40% by weight of a second high molecular weight copolymer B comprising ethylene and another olefin having from 4 to 8 carbon atoms and from 15 to 30% by weight of a third ultrahigh molecular weight ethylene copolymer C prepared in the presence of a Ziegler catalyst in a three-stage polymerization process comprising additionally an organic polyoxy compound or an organic polyhydroxy compound in an amount of from 0.01 to 0.5% by weight. | 03-25-2010 |
20100010163 | Polyethylene Molding Composition for Producing Injection-Molded Finished Parts - The invention relates to a polyethylene molding composition which has a multimodal molecular mass distribution and comprises a low molecular weight ethylene homopolymer A, a high molecular weight ethylene copolymer B and an ultrahigh molecular weight ethylene copolymer C. The molding composition has a density at a temperature of 23° C. in the range from 0.940 to 0.957 g/cm | 01-14-2010 |
20090311453 | Molding compostion comprsing polyethlene for preparing films and process for preparing the molding composition in the presence of a mixed catalyst - Molding composition comprising polyethylene and having a density in the range from 0.915 to 0.955 g/cm, an MI in the range from 0 to 3.5 g/10 min, an MFR in the range from 5 to 50, a polydispersity M | 12-17-2009 |
20090306324 | Polyethylene molding compositions for injection molding applications - Monomodal molding compositions based on polymers of ethylene, wherein the density of the molding compositions is in the range from 0.940 to 0.96 g/cm | 12-10-2009 |
20090306299 | Multimodal polyethylene composition, mixed catalyst and process for preparing the composition - A multimodal polyethylene composition, in particular suitable for the preparation of films, but also textile articles, blow molded articles and injection molded articles is described. The polyethylene composition of the invention comprises at least three ethylene polymer fractions having distinct molecular weights or comonomer contents, said at least three ethylene polymer fractions comprising at least one first ethylene polymer fraction having a first molecular weight, a first comonomer content lower than a predetermined value and a first density; at least one second ethylene polymer fraction having a second molecular weight higher than said first molecular weight, a second comonomer content higher than said first comonomer content, and a second density; and at least one third ethylene polymer fraction having a third molecular weight higher than said first molecular weight, a third comonomer content lower than a predetermined value, and a third density; wherein said at least one first ethylene polymer fraction and said at least third ethylene polymer fraction are prepared by the use of a first and, respectively, third catalyst and said at least one second ethylene polymer fraction is prepared by the use of a second catalyst of the single site type. The films prepared from the composition of the invention have improved water vapor barrier properties. Furthermore, a mixed catalyst system comprising at least three catalyst components and a process particularly suitable to prepare the composition of the invention are described. | 12-10-2009 |
20090286671 | Process for Preparing a Support for Olefin Polymerization Catalysts - The invention relates to a process for preparing an essentially spherical support for olefin polymerization catalysts, which comprises the steps: preparation of a hydrogel comprising a cogel of silicon oxide and at least one further metal oxide, if appropriate, washing of the hydrogel until the content of alkali metal ions is less than 0.1% by weight, based on the weight of solids, extraction of the water from the hydrogel until the water content is less than 5% by weight, based on the total content of liquid, and drying of the hydrogel to form a xerogel. According to the invention, the extraction step comprises at least one batchwise extraction with an organic solvent which is at least partially miscible with water down to a water content of less than 50% by weight, followed by at least one continuous extraction with an organic solvent which is at least partially miscible with water. | 11-19-2009 |
20090275712 | Metallocene Compounds - A bridged metallocene compound of formula (I) | 11-05-2009 |
20090259009 | Propylene Polymers - A polypropylene resin comprising a propylene polymer endowed with the following characteristics: a) distribution of molecular weight Mw/Mn lower than 4; b) the melt-viscosity measured at a temperature of 250° C. in the shear rate range between 1000 1/s and 40000 1/s meet the following relationship: c) h 9*e(−0.00006*sr)+2 a. wherein h represents the melt-viscosity in Pas and sr the shear rate in 1/s d) the isotactic pentads (mmmm) measured with by | 10-15-2009 |
20090259007 | Process for the polymerization of olefins - A multistep process comprising the following steps:
| 10-15-2009 |
20090246431 | Polypropylene containers having a barrier layer for the packaging, storage and preservation of foods - The present invention relates to the use of polypropylene containers for the packaging, storage and preservation of foods, with the containers having wall thicknesses of at least 0.4 mm and the polypropylene preferably being a transparent propylene homopolymer or propylene copolymer which has a haze value of ≦40%, based on a layer thickness of the polypropylene of 1 mm and measured on injection-molded test specimens, and has a tensile modulus of elasticity of ≧700 MPa, in the case of a homopolymer preferably ≧1500 MPa, and a Charpy notched impact toughness at 0° C. of ≧3 kJ/m | 10-01-2009 |
20090234084 | Metallocene Compounds - A metallocene compound of formula (I) wherein M is zirconium titanium or hafnium; X is hydrogen, halogen or an hydrocarbon group; R | 09-17-2009 |
20090171047 | Metallocene Compounds - A bridged metallocene compound of formula (I) | 07-02-2009 |
20090137739 | Polypropylene for Injection Molding - A polypropylene resin comprising a propylene polymer having the following features:
| 05-28-2009 |
20090124770 | Supported Metal Alkyl Compound and Process for the Polymerization of Olefins in Its Presence - The present invention relates to pulverulent solids obtainable by reaction of a metal alkyl compound of a divalent or higher-valent metal and a finely divided support which on its surface bears functional groups which can form a chemical bond between the metal atom of the metal alkyl compound and the surface of the support, wherein the particles of the finely divided support have particle diameters of less than 1000 nm and less than 5% by weight of the metal alkyl compound is extractable in a single extraction of the pulverulent solid with 20 ml of heptane per gram of solid at 50° C. In addition, the invention relates to a process for preparing the pulverulent solids, a catalyst composition for the polymerization of olefins which comprises the pulverulent solids and polymerization processes using the catalyst composition. | 05-14-2009 |
20090118522 | Synthesis of Cyclopentadienedithiophene Derivatives - A process for preparing cyclopentadiene derivatives having formula (I) wherein T | 05-07-2009 |
20090118451 | Polypropylene Random Copolymers Having High Melt Flow Rates for Injection Molding and Melt Blown Applications - Polypropylene resin comprising a propylene copolymer said polypropylene resins is endowed with the following features:
| 05-07-2009 |
20090118449 | PROCESS FOR THE PREPARATION OF ETHYLENE COPOLYMERS - A polymerization process comprising contacting under polymerization conditions ethylene and at least one alpha olefin of formula CH2=CHA wherein A is a C | 05-07-2009 |
20090105422 | Multimodal polyethylene molding composition for producing pipes having improved mechanical properties - A polyethylene molding composition having a multimodal molecular mass distribution and comprising from 45 to 55% by weight of a low molecular weight ethylene homopolymer A, from 20 to 40% by weight of a high molecular weight copolymer B comprising ethylene and another olefin having from 4 to 8 carbon atoms and from 15 to 30% by weight of an ultrahigh molecular weight ethylene copolymer C can be prepared in the presence of a Ziegler catalyst in a three-stage process and is highly suitable for producing pipes having excellent mechanical properties. | 04-23-2009 |
20090105414 | METHOD OF METERING PROCESS ADDITIVES, IN PARTICULAR ANTISTICS, INTO POLYMERIZATION REACTORS - Method for metering polar, antistatically acting process auxiliaries into a polymerization reactor in which the process auxiliaries are present in solution in a nonpolar solvent, wherein the electrical conductivity of the solution is measured and the amount of the process auxiliary metered in is determined from the electrical conductivity. | 04-23-2009 |
20090099315 | Polyethylene Composition Suitable for the Preparation of Films and Process for Preparing the Same - A polyethylene composition, in particular suitable for the preparation of films, and a process for preparing the same are described. The polyethylene composition of the invention comprises from 50 to 89% by weight of a first polyethylene component comprising at least one multimodal polyethylene including a plurality of ethylene polymer fractions having distinct molecular weights and comonomer contents, at least one of said plurality of ethylene polymer fractions being prepared by the use of a single site catalyst, and from 50 to 11% by weight of a second polyethylene component comprising a low or medium density polyethylene. | 04-16-2009 |
20090069518 | Process for the polymerization of 1-butene - A process for polymerizing 1-butene comprising the step of contacting under polymerization conditions 1-butene and optionally from 0 to 20% by mol of an alpha olefin with a catalyst system obtainable by contacting a bridget metallocene compound of formula (I) wherein R | 03-12-2009 |
20090069477 | Polyolefinic molding composition having improved resistance to thermooxidative degradation and its use for the production of pipes - A molding composition is suitable for the production of pipes having improved resistance to thermooxidative degradation when these pipes are in long-term contact with liquids comprising disinfectants having an oxidizing effect. Such molding composition comprises, in addition to thermoplastic polyolefins, a polyoxy compound and/or a polyhydroxy compound as additive in an amount of from 0.01 to 1.0% by weight. In addition, the molding composition can further comprise an unsaturated aliphatic hydrocarbon in an amount of up to 5% by weight. The invention also relates to a process for improving the long-term resistance of water pipes to damage caused by oxidizing disinfectants from the water by use of this molding composition. | 03-12-2009 |
20090062486 | Method of Changing Between Incompatible Polymerization Catalysts in a Gas-Phase Fluidized-Bed Reactor - Method of changing from a polymerization using a first catalyst to a polymerization using a second catalyst which is incompatible with the first catalyst in a gas-phase reactor, which comprises the steps a) stopping of the polymerization reaction using the first catalyst, b) flushing of the reactor under polymerization conditions with at least one deactivating agent comprising a volatile constituent and a nonvolatile constituent in a weight ratio of from 0.1 to 1000, c) introduction of the second catalyst into the reactor and d) continuation of the polymerization using the second catalyst. | 03-05-2009 |
20090054609 | Process for the Preparation of Unsymmetric Bis(Imino) Compounds - Process for the preparation of monoimine compounds, wherein a dicarbonyl compound is reacted in an aliphatic, non-aromatic solvent with aniline. Monoimine compounds having electron-withdrawing substituents in the ortho position and unsymmetric bis(imino) compounds and unsymmetric iron complexes prepared therefrom and the use thereof in the polymerization of olefins. | 02-26-2009 |
20090048099 | Process for Preparing a Support for Olefin Polymerization Catalysts - The invention relates to a process for preparing an essentially spherical support for olefin polymerization catalysts, which comprises the steps: preparation of a hydrogel comprising a cogel of silicon oxide and at least one further metal oxide, if appropriate, washing of the hydrogel until the content of alkali metal ions is less than 0.1% by weight, based on the weight of solids, extraction of the water from the hydrogel until the water content is less than 5% by weight, based on the total content of liquid, and drying of the hydrogel to form a xerogel. According to the invention, the extraction step comprises at least one first extraction with a first organic solvent which is at least partially miscible with water down to a water content of 50% by weight, followed by at least one second extraction with a second organic solvent which is at least partially miscible with water. | 02-19-2009 |
20090030166 | Preparation of supported catalyst systems containing reduced amounts of aluminoxanes - The present invention relates to a process for preparing a catalyst solid for olefin polymerization, comprising a finely divided support, an aluminoxane and a metallocene compound, which comprises: a) firstly combining the finely divided support with the aluminoxane and subsequently b) adding the reaction product of a metallocene compound with at least one organometallic compound to the modified support, catalyst solids obtainable by this process, catalyst systems comprising these catalyst solids, their use for the polymerization of olefins and a process for the polymerization of olefins. | 01-29-2009 |
20090023873 | Process for the polymerization of olefins - A multistep process comprising the following steps: step a) polymerizing propylene and optionally one or more monomers selected from ethylene or alpha olefins of formula CH | 01-22-2009 |
20090018292 | Monocyclopentadienyl Complexes - Monocyclopentadienyl complexes in which the cyclopentadienyl system bears at least one bridged keto, thioketo, imino or phosphino group, a catalyst system comprising at least one of the monocyclopentadienyl complexes and a process for preparing polyolefins by polymerization or copolymerization of olefins in the presence of the catalyst system. | 01-15-2009 |
20090017710 | Propylene Melt Blown Resins, Propylene Melt Blown Resin Fibers and Non-Woven Fabric Made From the Same, and Methods of Making the Same - A polypropylene homopolymer melt blown resin comprising a melt flow rate of about 300 to about 2500 g/10 min. at 230° C., a polydispersion index of about 1.3 to about 2.9, and a melting point of at least 160° C. | 01-15-2009 |
20090012239 | Process for Producing Thermoformed Articles - A process for obtaining thermoformed articles, comprising the following steps: a) forming a sheet comprising a propylene resin; b) thermoforming the sheet obtained in step a); wherein said propylene resin has the following characteristics: a) distribution of molecular weight Mw/Mn lower than 4; preferably lower than 3; b) 2.1 insertions measured with by 13C-NMR lower than 0.50%; preferably lower than 0.40%; c) eta* and the frequency ω meet the following relation for ω comprised between 0.1 and 1: eta*>3700ω(−0 13) d) melt flow rate (MFR) (ISO 1133) lower than 5; preferably lower than 4; more preferably lower than 3; wherein the polypropylene resin comprises: (i) from 10 to 100% by weight of a propylene homopolymer or a propylene copolymer containing from 0.1% to 10% by mol of derived units of ethylene or an alpha-olefin of formula CH2═CHZ wherein Z is a linear or branched C2-C20 radical; and (ii) from 0 to 90% by weight of a propylene copolymer containing from 0.1% to 10% by mol of derived units of ethylene or an alpha-olefin of formula CH2═CHZ wherein Z is a linear or branched C2-C20 radical, said propylene copolymer having a content of ethylene or an alpha-olefin of formula CH2═CHZ different from the propylene copolymer (i). | 01-08-2009 |
20090008824 | Polyethylene Composition for Stretched Tape Products - A polyethylene composition, in particular suitable for the preparation of monofilaments, mono-tapes and stretched tapes, is described. The polyethylene composition of the invention comprises 95.1%-99.5% by weight of polyethylene having a density above 0.930 g/cm and a polydispersity M | 01-08-2009 |
20090005571 | Process for Preparing Imino Compounds - Process for preparing imine compounds, in which a carbonyl compound is reacted with a primary amine. The imine compound obtained in this way can be reacted further with a metalalkyl and subsequently a carbonyl compound to form an imine compound. | 01-01-2009 |
20080319135 | 1-Butene Polymers Composition - A 1-butene polymer composition comprising:
| 12-25-2008 |
20080306224 | Supported Metal Alkyl Compound And Its Preparation - Pulverulent solid which consists essentially of at least one metal alkyl compound bound chemically and/or physically to a finely divided, porous, mechanically stable and chemically inert support, has a proportion by weight of metal alkyl compound of at least 5% by weight, based on the support, and has an angle of repose, determined in accordance with ISO 4324, of up to 48°. The solid allows trouble-free metering as active component into a reactor. | 12-11-2008 |
20080287692 | Synthesis of cyclopentadiene derivatives - A compound of formula (X): | 11-20-2008 |
20080286509 | Polyethylene and Catalyst Composition for Its Preparation - A polyethylene which comprises ethylene homopolymers and/or copolymers of ethylene with 1-alkenes and has a molar mass distribution width M | 11-20-2008 |
20080281062 | Catalyst System for the Polymerization of Olefin - A catalyst system solution obtainable by a process comprising the following steps:
| 11-13-2008 |
20080281061 | Process for Polymerizaing 1-Hexene or Higher Alpha-Olefins - A process for preparing a polymer containing derived units of one or more alpha olefins of formula CH | 11-13-2008 |
20080275254 | Process for polymerizing 1-butene - A process for polymerizing 1-butene, optionally with up to 30% by mol of ethylene, propylene or an alpha olefin of formula CH | 11-06-2008 |
20080269445 | Monocyclopentadienyl Complexes - Monocyclopentadienyl complexes in which the cyclopentadienyl system bears at least one bridged donor and at least one arylalkyl group and a catalyst system comprising at least one of the monocyclopentadienyl complexes, and also methods for preparing them, the use of the catalyst system for the polymerization or copolymerization of olefins and a process for preparing polyolefins by polymerization or copolymerization of olefins in the presence of the catalyst system and the preparation of the associated cyclopentadienyl system. | 10-30-2008 |
20080269437 | Catalyst Comprising Chromium and Zirconium for the Polymerization and/or Copolymerization of Olefins - Catalyst for the polymerization and/or copolymerization of olefins which is obtainable by application to a finely divided inorganic support and concluding calcination at temperatures of from 350 to 1050° C. and has a chromium content of from 0.1 to 5% by weight and a zirconium content of from 0.5 to 10% by weight, in each case based on the element in the finished catalyst, with the molar ratio of zirconium to chromium being from 0.6 to 5. | 10-30-2008 |
20080249273 | Isotactic 1-butene copolymers - An isotactic 1-butene copolymer having a content up to 30% by mol of at least one alpha-olefin of formula CH | 10-09-2008 |
20080200708 | Preparation of Partially Hydrogenated Rac-Ansa-Metallocene Complexes - The invention relates to a process for preparing hydrogenated or partially hydrogenated, racemic ansa-metallocene complexes by reacting bridged or unbridged transition metal complexes with alkali metal compounds or alkaline earth metal compounds, heating the resulting reaction mixture to a temperature in the range from −78 to 250° C. and at least partially hydrogenating the reaction products in the presence of a suitable catalyst, to the corresponding hydrogenated or partially hydrogenated metallocenes and to their use as catalysts or as a constituent of catalysts for the polymerization of olefinically unsaturated compounds or as reagents or catalysts in stereoselective synthesis. | 08-21-2008 |
20080200622 | Nmr Method of Determining and Regulating the Composition of Polymer Mixtures in Polymerization - Method of determining the composition of polymer mixtures comprising defined polymer components of differing mean molar masses M | 08-21-2008 |
20080199674 | Polyethylene Molding Composition for Producing Blown Films Having Improved Mechanical Properties and Processability - The invention relates to a polyethylene molding composition having a multimodal molar mass distribution particularly suitable for blow molding films having a thickness in the range from 8 to 200 μm. The molding composition has a density at a temperature of 23° C. in the range from 0.948 to 0.953 g/cm | 08-21-2008 |