Basf Aktiengesellschaft

Basell Polyolefine Gmbh

Martin Lux

Dieter Lilge

Wolfgang Rohde

Peter Bauer

Roland Saive

Guido Funk

Andreas Deckers

David Fischer

Hans-Helmut Goertz

Rainer Konrad

Shahram Mihan

Franz Langhauser

Rainer Karer

Martin Schneider

Paulus De Lange

Heinz Vogt

Joachim Wulff-Döring

Philipp Rosendorfer

Volker Rauschenberger

Günther Schweier

Peter Kölle

Hans-Joachim Mueller

Godofredo Follmer

Ulrike Reissmann

Frank Edelmann

Roland Hingmann

Thomas Kessler

Gunther Schweier

Rolf Muelhaupt

Josef Wunsch

Wolfgang Micklitz

Uwe Faller

Ruger Schlund

Thomas Bl&uuml;mel

R&uuml;ger Schlund

Helmut Frank

Novel supported, titanized chromium catalysts for the homopolymerization of ethylene and the copolymerization of ethylene with &#x3b1;-olefins, a process for preparing them and to their use for the polymerization of olefins.

Supported, titanized chromium catalyst and its use for preparing homopolymers and copolymers of ethylene

The invention relates to a process for preparing a catalyst for the polymerization of olefins, which comprises:

Polymerization catalyst used for producing polyolefins that have excellent combined properties

Novel supported, titanized chromium catalysts can be used for the homopolymerization of ethylene and the copolymerization of ethylene with &#x3b1;-olefins.

Suspended chrome catalyst containing titanium and the use thereof for producing ethylene homopolymers and copolymers

Bimodal polyethylene blends are made from a high-molecular-weight ethylene copolymer and a low-molecular-weight ethylene homo- or copolymer and have a melt flow rate MFR 190/21.6 of from 6 to 14 g/10 min, a density of from 0.94 to 0.97 g/cm , an environmental-stress-cracking resistance ESCR>150 h and a value of less than 3 when the quality of blending in the blend is measured to ISO 13949. A process prepares polyethylene blends of this type by melting and homogenization in a mixing apparatus and discharge via a gear pump. The blends are used to produce moldings, in particular hollow articles and pressure pipes.

High mixture-quality bi-modal polyethylene blends

In a low-odor polyethylene blend made from a high-molecular-weight ethylene copolymer obtainable by polymerization in the presence of a Ziegler catalyst and from a low-molecular-weight ethylene homopolymer or ethylene copolymer obtainable by polymerization in the presence of a chromocene catalyst on an oxidic support, the Al content of the high-molecular-weight component is from 5 to 60 mg/kg, the Al content of the low-molecular-weight component is from 0 to 5 mg/kg and the Al content of the blend is from 1 to 55 mg/kg. Processes are described for preparing blends of this type. Their use is described for producing moldings, in particular hollow articles and pipes. Moldings, in particular hollow articles and pipes, are produced from low-odor polyethylene blends.

Low-odor polyethylene blends

A polymer mixture comprises at least 40 but less than 85% by weight of an ethylene copolymer (A) which has a density of from 0.91 to 0.93 g/cm , an HLMFR (190&deg; C./21.6 kg) of from 5 to 60 g/10 min and a molar mass distribution M /M &lE;3, and more than 15 but at most 60% by weight of an ethylene copolymer (B) which has a density of from 0.93 to 0.945 g/cm , an HLMFR (190&deg; C./21.6 kg) of from 8 to 20 g/10 min and a molar mass distribution M /M &gE;7, where the percentages by weight are in each case based on the total mass of the components (A) and (B).

Polymer mixture with good workability

Polymer blends contain at least 85% by weight of ethylene/&agr;-olefin copolymers (A) prepared by metallocene catalysis and from 1 to 15% by weight of essentially linear ethylene/&agr;-olefin copolymers (B) prepared using another catalyst, the percentages in each case being based on the total weight of the polymer blend.

Polymer mixture

Amidinato catalyst systems for the polymerization of olefins

Polymerisates of ethylene with a high degree of resistance to stress crack, and a catalyst system for the production thereof

Polymers of C.sub.2 -C.sub.12 -alk-1-enes are prepared at from -50 to 300.degree. C. and from 0.5 to 3000 bar in the presence of a catalyst system by a process in which the catalyst system used is one which contains

Preparation of polymers of alk-1-enes in the presence of a supported

Process for producing polymers of vinyl aromatic compounds using

Preparation of polymers of ethylene by suspension polymerization

Catalyst systems which are suitable for the polymerization of olefinically unsaturated hydrocarbons contain, as active components,

A process for the preparation of a supported catalyst for the polymerization of .alpha.-olefins, in which

Preparation of a supported catalyst for the polymerization of

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Schwarzenbach, Germany

Martin Lux