Basf Aktiengesellschaft

Basell Polyolefine Gmbh

Other

Basell Poliolefine Italia S.r.l.

Marc Oliver Kristen

Benno Bildstein

Alexander Krajete

Dieter Lilge

Michael Malaun

Christoph Amort

Andrei Gonioukh

Heike Gregorius

Ursula Rief

Peter Jutzi

Markus Schmid

G&uuml;nther Schweier

Stefan Mecking

Ulrich Moll

Mubarik Mahmood Chowdhry

Lambertus Manders

Rolf Mülhaupt

Giampiero Morini

Reinhold J Leyrer

Franz Langhauser

Simona Guidotti

Wolfgang Rohde

David Fischer

Martin Schneider

Alessandro Mignogna

Peter Preishuber-Pflügl

Thomas Redeker

Peter K&ouml;lle

Stephan Lehmann

Florian M Bauers

Gerhard Hauck

Wilhelm Keim

Michael Gepr&auml;gs

Matthias Koch

Peter Eibeck

Markus Klapper

Peter Hofmann

Carsten S&uuml;ling

Klaus M&uuml;llen

Jun Okuda

Laurent Deloux

Masaki Fushimi

Patrik M&uuml;ller

Lenka Richter-Lukesova

Alexander Haunschild

Martin Stork

Wing-Por Leung

Michael Franz Lappert

Dirk Saurenz

Berth-Jan Deelmann

Valentine Reimer

Ralf Krammer

Helmut Sitzmann

Hung-Kay Lee

Martin Koehler

Mengzhen He

Joachim Heinicke

Oliver Kuhnert

Ulrich Siemeling

Holger Braunschweig

Carsten Von Koblinski

Frank Eisentr&auml;ger

Peter Preishuber-Pfl&uuml;gl

Georg Müller

Jochem T M Pater

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

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

The present invention relates to catalysts systems for the polymerization of olefins CH&#x2550;CHR, wherein R is an alkyl, cycloalkyl or aryl radical having 1-12 carbon atoms, comprising (A) a solid catalyst component comprising Ti, Mg, and halogen (B) an aluminum alkyl compound and (C) a brominated cyclic hydrocarbon. Said catalyst systems have improved polymerization activity.

Catalyst for the polymerization of olefins

The present invention relates to new catalyst supports comprising nanofibers, a catalyst system comprising these supports as well as a process for preparing nanocomposites and the nanocomposites prepared. The invention especially concerns a supported catalyst system for polymerization of olefins, comprising a support made of fibers or a fleece of fibers, wherein the mean fiber diameter is less than 1000 nm, preferably less than 500 nm and the mean fiber length is more than 200,000 nm, preferably more than 500,000 nm and especially preferred more than 1,000,000 nm as well as a process for polymerizing olefinic systems in the presence of these catalyst systems and the resulting nanocomposites.

Catalyst system for polymerization of olefinic monomers, process for preparing polymers, and polymers prepared by the process

In a method of selecting polymerization catalysts, in particular Phillips catalysts for the polymerization of olefins, from a multiplicity of catalysts on the basis of their catalytic properties, a multiplicity of catalyst precursors or catalyst supports are converted in parallel into polymerization catalysts in a pretreatment step in an array of reactors, where the pretreatment comprises at least one thermal treatment step at from 250 to 1200&#xb0; C. Furthermore, at least one starting material is converted with the aid of the respective polymerization catalysts under prescribed polymerization conditions into at least one polymer product in a polymerization step and, finally, analysis of the polymer product or products is carried out to determine its composition and/or chosen properties. This makes it possible to carry out a thermal pretreatment of polymerization catalysts quickly under defined conditions which can be varied.

Selection of polymerization catalysts and apparatus for carrying this out

Catalysts for the polymerization of unsaturated compounds

Transition metal catalysts for (co) polymerizing of olefinic monomers

A process for emulsion polymerizing one or more olefins involves reacting it/them with at least one complex compound of the formula Ia or b where M is a transition metal from groups 7 to 10 of the Periodic Table of the Elements and is preferably Ni in aqueous dispersion and at least one radical Rto Rand optionally one radical Rto Rcontains a hydrophilic group X, selection being made from &#x2014;SO, &#x2014;O&#x2014;PO, NH(R), N(R)or &#x2014;(OCHCH)OH, where n is an integer between 1 and 15. For the process of the invention it is optional to use an activator such as, for example, olefin complexes of rhodium or of nickel. This invention further relates to dispersions of polyolefins such as polyethylene and ethylene copolymers in water, for example, and to the use of the aqueous dispersions of the invention for paper applications such as paper coating or surface sizing, paints, adhesive base materials, molded foams such as mattresses, textile and leather applications, carpet back coatings, or pharmaceutical applications.

Method for the emulsion polymerization of olefins

Complexes of the formula I,where M is an element of groups 6 to 10 of the Periodic Table of the Elements, preferably Ni, can be used for the polymerization and copolymerization of olefins, for example in suspension polymerisation processes, gas-phase polymerization processes, bulk polymerization processes or emulsion polymerization processes.

Ligands, complexes and their use for the polymerization of olefins

A method of determining the quality of polymerization catalysts comprises

Determination of the quality of polymerization catalysts

Complexes of the formula Iwhere M&#x2550;Ni, Pd; process for preparing the metal complexes and the use of the complexes obtainable in this way for the polymerization and copolymerization of olefins, for example in suspension polymerization processes, gas-phase polymerization processes and bulk polymerization processes.

Metal complexes of iminohydroxamic acids

Complexes of the formulae Ia and Ibwhere M=Ti, Zr, Hf, V, Nb or Ta, can be used for the polymerization and copolymerization of olefins, for example in suspension polymerization processes, gas-phase polymerization processes and bulk polymerization processes.

Complexed compounds and use thereof for the polymerization of olefins

The invention relates to coordination compounds of the general formulae (Ia) to (Ib), wherein M=Ti, Zr, Hf, V, Nb or Ta. The invention also relates to a method for producing the metal complexes and to the use of the complexes so obtained for the polymerization and copolymerization of olefins. For example in suspension polymerization methods, gas phase polymerization methods and bulk polymerization methods

Coordination compounds and their use for the polymerization of olefins

Complexes of the formulae I a to d,where M is an element of groups 6 to 10 of the Periodic Table of the Elements, preferably Ni, can be used for the polymerization and copolymerization of olefins, for example in suspension polymerization processes, gas-phase polymerization processes, bulk polymerization processes and emulsion polymerization processes.

Complex compounds and their use in olefin polymerization

Complexes of the formula I,where M is an element of group 6 to 10 of the Period Table of the Elements, preferably Ni, can be used for the polymerization and copolymerization of olefins, for example in suspension polymerisation processes, gas-phase polymerization processes, bulk polymerization processes or emulsion polymerization processes.

Ligands, complex compounds and their use for polymerising olefins

Complexes of the formulae Ia and Ibwhere M=Ti, Zr, Hf, V, Nb, Ta, Cr, Ni, Pd, can be used for the polymerization and copolymerization of olefins, for example in suspension polymerization processes, gas-phase polymerization processes and bulk polymerization processes.

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Limburgerhof, Germany

Marc Oliver Kristen