Basell Polyolefine Gmbh

Harald Schmitz

Shahram Mihan

Rainer Karer

Gerhardus Meier

Bernd Lothar Marczinke

Harilaos Mavridis

Ulf Schueller

Fabiana Fantinel

Manfred Hecker

Elke Damm

Sameer D Mehta

Andreas Maus

Jennifer Kipke

Eric D Day

Sebastian Wilhelm

Dieter Lilge

Guido Funk

Volker Fraaije

Paulus De Lange

Gerd Mannebach

Reynald Chevalier

Jörg Auffermann

Peter Bisson

Maclovio Herrera Salinas

Lenka Richter-Lukesova

Thomas Lindner

Bernd Hoecker

Adrian Popa

Jürgen Hilz

A polyethylene composition particularly suited for producing blow-molded hollow articles, having the following features:

Polyethylene composition for blow molding having an improved swell behavior

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.

Polyethylene composition suitable for the preparation of films and process for preparing the same

A polyethylene for IM having excellent processing properties in terms of spiral flow testing is devised.

Polyethylene for injection moldings

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&#xb0; 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.

Process for the preparation of supported catalysts

A multimodal polyethylene composition comprising at least three ethylene polymer fractions having distinct molecular weights or comonomer contents, the at least three ethylene polymer fractions comprising at least one first ethylene polymer fraction having a first molecular weight, at least one second ethylene polymer fraction having a second molecular weight higher than the first molecular weight, and at least one third ethylene polymer fraction having a third molecular weight higher than the first molecular weight, wherein the at least one first ethylene polymer fraction and the at least third ethylene polymer fraction are prepared by the use of a first and, respectively, third catalyst of the single site type.

Multimodal polyethylene composition, mixed catalyst and process for preparing the composition

Process for supportation of a catalyst system comprising at least two different active catalyst components on a support wherein

Catalyst system for olefin polymerization, its production and use

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.

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

The invention relates to a bimodal or multimodal polyethylene which comprises ethylene homopolymers and/or copolymers of ethylene with &#x3b1;-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.

Polyethylene and catalyst composition and process for the preparation thereof

The present invention relates to a new hybrid catalyst system for the polymerization of olefins and to a polymerization process carried out in the presence of said catalyst. The new hybrid catalyst system comprises a tridendate iron compound and a zirconocene having a bridge of at least three carbon atoms connecting two indenyl ligands.

Hybrid catalyst composition for polymerization of olefins

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.

Iron complexes and their use in polymerization processes

Method of preparing olefin polymers, which comprises the polymerization of at least one &#x3b1;-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.

Method of controlling the relative activity of the different active centers of hybrid catalysts

Process for producing a catalyst system, which comprises the following steps: A) provision of a mixture of at least two different organic transition metal compounds, at least one hydrolyzed organoaluminum compound and a solvent and impregnation of a dry porous support component with the mixture from step A), with the total volume of the mixture being from 0.6 to 1.5 times the total pore volume of the support component, and also catalyst systems obtainable in this way and their use for olefin polymerization.

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Weinheim, Germany

Harald Schmitz