Basell Polyolefine Gmbh

Hoechst Aktiengesellschaft

Clariant Corporation

Hostalen Polyethylen Gmbh

Bassell Poliolefine Gmbh

Joachim Berthold

Heinz Vogt

Gerhardus Meier

Bernd Lothar Marczinke

Ludwig Böhm

Ludwig B&ouml;hm

Iakovos Vittorias

Ludwig Bohm

Diana Doetsch

Johannes-Friedrich Enderle

Wolfgang Strobel

Rainer Franke

Bernd Diedrich

Rainer Lecht

Ulrich Schulte

Werner Schafer

Lutz-Gerd Heinicke

Jurgen Hartlapp

Albert Weber

Johannes-Gerhard Müller

Shahram Mihan

Dieter Lilge

Gerd Hohner

Hans-Friedrich Herrmann

Martin Schneider

Kaspar Evertz

Manfred Hecker

Gerd Mannebach

Elke Damm

Peter Kölle

Friedhelm Gundert

Peter Bisson

Hartmut Luker

Rainer Sattel

Diana Dötsch

Reinhard Schubbach

Werner Breuers

Frank Peter Alt

Paul-Richard Sch&ouml;neborn

Werner Rothhöft

Manfred Fleissner

Peter Krümpel

Hansjörg Nitz

James Stern

Hans Joachim Vetter

Heiner Bromstrup

Rainer Mantel

Johannes Friedrich Enderle

Johannes Friederich Enderle

Rainer M&uuml;nnig

Diana (nee Boos) Doetsch

Hans-Jörg Nitz

Klaus Föttinger

Diana DÖTSCH

Diana Boos

Werner Rothhoeft

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 &#x3bc;m. The molding composition has a density at a temperature of 23&#xb0; C. in the range from 0.953 to 0.960 g/cmand an MFRof the final product after extrusion in the range from 0.10 to 0.50 dg/min. The composition comprises from 30 to 60% by weight of a first ethylene polymer fraction made of a homopolymer A having a first molecular weight, from 22 to 40% by weight of a second ethylene polymer fraction made of a further homopolymer or first copolymer B of ethylene and at least one first comonomer from the group of olefins having from 4 to 8 carbon atoms, the first copolymer B having a second molecular weight higher than the first molecular weight, and from 10 to 30% by weight of a third ethylene polymer fraction made of a second copolymer C having a third molecular weight higher than the second molecular weight. The molding composition of the invention allows to produce thin films having improved processability without impairing the mechanical properties.

Polyethylene molding composition for producing blown films having improved processability

A novel polyethylene formed by Ziegler catalyst is devised, for use in blow moulding.

Trimodal polyethylene for use in blow moulding

Novel polyethylenes having defined molecular weight distribution and LCB structure are devised, for films or moldings.

Polyethylene composition and finished products made thereof

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.

Multimodal polyethylene molding composition for producing pipes having improved mechanical properties

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&#xb0; C. in the range from 0.940 to 0.957 g/cm, an MFR (190&#xb0; C./2.16 kg) in the range from 0.5 to 4 dg/min and a viscosity number VNof the mixture of ethylene homopolymer A, copolymer B and ethylene copolymer C, measured in accordance with ISO/R 1191 in decalin at a temperature of 135&#xb0; C., in the range from 150 to 300 cm/g. The invention further relates to the use of such a molding composition for producing injection-molded finished parts, and to finished parts produced by injection molding.

Polyethylene molding composition for producing injection-molded finished parts

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 moldings, especially rotomoulded articles.

Adhesive polymer composition

A solid catalyst component comprising the product of a process comprising (a) reacting a magnesium alcoholate of formula Mg(OR)(OR) compound, in which Rand Rare identical or different and are each an alkyl radical having 1 to 10 carbon atoms, with titanium tetrachloride carried out in a hydrocarbon at a temperature of 50-100&#xb0; C., (b) subjecting the reaction mixture obtained in (a) to a heat treatment at a temperature of 110&#xb0; C. to 200&#xb0; C. for a time ranging from 3 to 25 hours (c) isolating and washing with a hydrocarbon the solid obtained in (b), said solid catalyst component having a Cl/Ti molar ratio higher than 2.5.

Catalyst component for the polymerization of olefins

A novel polyethylene composition is described. The composition is suitable for manufacturing especially stretched bands or tapes, also coined raffia in the art.

Polyethylene moulding composition

A blown film having a thickness from 8 to 200 &#x3bc;m 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; an MFR, from 0.10 to 0.50 dg/min; comprising:

Films having improved mechanical properties

The invention relates to a polyethylene molding composition having a multimodal molecular mass distribution and comprising a first ethylene homopolymer fraction (I), a second ethylene copolymer fraction (II) and a third ethylene copolymer fraction (III). The molding composition has a density at a temperature of 23&#xb0; C. in the range from 0.945 to 0.953 g/cm, an MFR (190&#xb0; C./5 kg) in the range from 2 to 7 g/10 min and a viscosity number VNof the total mix of ethylene homopolymer fraction (I), copolymer fraction (II) and ethylene copolymer fraction (III), measured in accordance with ISO/R 1191 in decalin at a temperature of 135&#xb0; C., in the range from 200 to 250 cm/g. The invention further relates to the use of such a molding composition for producing high-strength injection-molded screw cap closures for bottles comprising beverages, especially carbonated beverages.

PE moulding composition for producing injection-molded screw cap closures and high-strength screw cap closure for carbonated beverages produced therewith

The invention relates to a polyethylene molding composition which has a multimodal molar mass distribution and is particularly suitable for producing external sheathing of electric or information transmission cables. The molding composition has a density at a temperature of 23&#xb0; C. in the range from 0.94 to 0.95 g/cmand an MFIin the range from 1.2 to 2.1 dg/min. It comprises from 45 to 55% by weight of a low molecular weight ethylene homopolymer A, from 30 to 40% by weight of a high molecular weight copolymer B of ethylene and another olefin having from 4 to 8 carbon atoms and from 10 to 20% by weight of an ultra high molecular weight ethylene copolymer C. The invention also relates to an electric or information transmission cable having an external sheath of the polyethylene molding composition which has a thickness in the range from 0.2 to 3 cm.

Polyethylene molding composition for external sheathing of electric cables

The invention relates to a continuous process for preparing polyolefins having a bimodal or multimodal molar mass distribution in suspension in at least two reactors R, R.x, R.y which are connected in series and in which different reaction conditions are set. In this process, the offgases A, A.x, A.y, Aand Aleaving all the reactors connected in series are firstly collected, the collected offgases are then compressed in a compression stage, the compressed offgases are subsequently cooled and the cooled material is separated into a gaseous fraction and a liquid fraction. The separated fractions are then recirculated to the polymerization process at different points. The process of the invention allows the total conversion of the polymerization, based on monomer and comonomer used, to be increased to a surprising extent.

Process for preparing polyolefins in suspension

The invention relates to a polyethylene molding composition which has a multimodal molar mass distribution and is particularly suitable for producing protective coatings on steel pipes. The molding composition has a density at a temperature of 23&#xb0; C. in the range from 0.94 to 0.95 g/cmand an MFIin the range from 1.2 to 2.1 dg/min. It comprises from 45 to 55% by weight of a low molecular weight ethylene homopolymer A, from 30 to 40% by weight of a high molecular weight copolymer B of ethylene and another olefin having from 4 to 8 carbon atoms and from 10 to 20% by weight of an ultra high molecular weight ethylene copolymer C.

Polyethylene molding composition for coating steel pipes

The invention relates to a polyethylene composition with multi-modal molecular mass distribution, which is particularly suitable for blow molding of small containers with a volume in the range of from 200 to 5000 cm(=ml). The composition has a density in the range of from 0.955 to 0.960 g/cmat 23&#xb0; C. and an MFRin the range from 0.8 to 1.6 dg/min. It composition from 45 to 55% by weight of a low-molecular-mass ethylene homopolymer A, from 20 to 35% by weight of a high-molecular-mass copolymer B made from ethylene and from another 1-olefin having from 4 to 8 carbon atoms, and from 20 to 30% by weight of an ultrahigh-molecular-mass ethylene copolymer C.

Polyethylene blow molding composition for producing small containers

The invention relates to a method for producing a poly-1-olefin by polymerization of a 1-olefin of the formula RC&#x2550;CH, in which Ris hydrogen or an alkyl radical having from 1 to 10 carbon atoms, in suspension, in solution or in the gas the gas phase, at a temperature of from 20 to 200&#xb0; C. and a pressure of from 0.5 to 50 bar, in the presence of a catalyst which consists of the product of the reaction of a magnesium alkoxide with a transition-metal compound (component a) and an organometallic compound (component b), whose component (a) has been produced by reacting a transitionmetal compound of titanium, zirconium, vanadium or chromium with a gelatinous dispersion of the magnesium alkoxide in an inert hydrocarbon. In accordance with the invention, the gelatinous dispersion is obtained by stirring, using a stirring element, or shearing, using a high-performance shearing tool, a suspension of a magnesium alkoxide powder having a mean particle size, expressed as the dvalue, in the range from 50 to 1000 um, in an aliphatic hydrocarbon in which the magnesium alkoxide particles are insoluble. The suspension has, before conversion into the dispersion, been subjected to heat treatment at a temperature in the range from 40 to 150&#xb0; C. over a period of from 10 to 100 hours.

Method for producing a poly-1-olefin in the presence of a Ziegler catalyst

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Kelkheim, Germany

Joachim Berthold