Hoechst Aktiengesellschaft

Evonik Oxeno Gmbh

Bayer Aktiengesellschaft

Merck Patent Gmbh

Basell Polyolefine Gmbh

Merck Patent Gesellschaft

Merck Patent Gesellschaft MIT Beschr&auml;nkter Haftung

Carl Robert Eckelmann Ag

Evonik Degussa Gmbh

Walter Kaminsky

Herbert Schumann

Maria Buschermohle

Birgit Corinna Wassermann

Eike Poetsch

Michael Grass

Klaus-Diether Wiese

Franz Nierlich

Dagmara Ortmann

Andrea Eisenhardt

Manfred Arnold

Stefan Schutte

Stefanie Derlin

Andre Laban

Klaus Kulper

Markus Hummert

Sebastian Dechert

Heinrich Hahnsen

Frank Kueber

Wolfgang Nentwig

Berthold Schiemenz

Michael Dauben

Wilfried Wassermann

Hartmut Luker

R&uuml;diger Engehausen

Katrin Koehler

Jana Knorr

Hansjorg Sinn

Volker Scholz

Rudiger Woldt

Stanislav Tysarcyk

Jorg Janning

Regina Spiehl

Kartin Köhler

Stefan Niedoba

Christian Str&uuml;bel

Jens Eichhorn

Heinz Hermann Greve

Frank Freidanck

Ralf Werner

Anne-Meike Schauwienold

Katharina Lange

Katrin K&ouml;hler

Björn Heuer

Sebastiain Dechert

The present invention relates to a copolymer which contains 3-methylbut-1-ene as a comonomer and which contains ethene or propene as a further monomer, the proportion of the incorporated 3-methylbut-1-ene being 0.1 to 40 mol %, and to a process for preparing such copolymers, the polymerization being performed in the presence of a catalyst which comprises at least one cyclopentadienyl group.

Process for preparing polymers from 3-methylbut-1-ene

The invention relates to the use of nitrogenous aluminium organyl complexes of general formula (I) as co-catalysts in heterogeneous polymerisation reactions of propene. In said formula: R, R', Rand R&#x2032; independently of one another represent branched or unbranched C-Calkyl, cycloalkyl, alkenyl, cycloalkenyl, aryl or alkynyl; Rrepresents unsubstituted, monoalkylated or polyalkylated and/or monofluorinated or polyfluorinated aromatic hydrocarbons from group (II); Rand Rindependently of one another represent CH, CFoder C(R); m stands for 0, 1 or 2; n stands for 0, 1 or 2; o stands for 0 or 1, all independently of one another. Said systems exhibit improved characteristics in terms of activity and stereoselectivity in comparison to conventional co-catalysts such as AlEtand can act simultaneously as co-catalysts and stereoselectivity promoters 

Catalyst systems for Ziegler-Natta propene polymerisation

Disclosed are compounds of formula (I) which compounds are useful as cocatalysts in olefinic polymerisation reactions, e.g., as Ziegler-Natta catalysts.

Oxygen-containing organoaluminium complexes as cocatalysts

Described are catalyst systems having aluminium alkyl complexes of the formula (I) described herein applied to magnesium chloride, SiO or SiO in combination with MgCl as support in the presence of titanium halides or vanadium halides and internal and, if desired, external donors act both as cocatalysts and as stereoselectivity promoters in heterogeneous polymerizations of &agr;-olefins. Also described are polymerization methods using these catalyst systems.

Catalyst system for the Ziegler-Natta polymerization of olefins

A stereorigid metallocene compound contains, as ligands, an aryl-substituted cyclopentadienyl radical, linked via a hydrogen bridge, and a substituted or unsubstituted fluorenyl radical. The novel metallocene compound is suitable as a catalyst component for olefin polymerization.

Stereorigid metallocene compounds

The present invention is directed to a catalyst system, the use thereof in the polymerization of dienes in a solution, suspension and vapor phase, and the use of diene rubbers produced therewith, exhibiting a high cis content, an average vinyl content and a low gel content.

Catalyst system, the use thereof in the polymerization of dienes in a solution, suspension and vapor phase and the use of diene rubbers produced therewith

Crystalline, isotactic homopolymers of cycloolefins or elastic copolymers made from cycloolefins and linear olefins are obtained, without ring opening of the cycloolefins, at industrially favorable polymerization temperatures by means of a catalyst which comprises a stereorigid, chiral metallocene compound of groups IVb to VIb of the Periodic Table of the Elements and an aluminoxane.

Process for the preparation of an olefin polymer

Process for the preparation of optically active polyolefins by polymerizing olefins of the formula CH.sub.2 .dbd.CHR in which R.dbd.C.sub.1 C.sub.10 -alkyl in the presence of an optically active catalyst system composed of an optically active transition metal compound containing only enantiomer (R- or S-form) of a stereorigid, chiral transition metal compound and an aluminum-containing compound of the aluminoxane type.

Process for the preparation of optically active polyolefins

Stereoblock polymers of 1-olefins having a broad uni-, bi-, tri- or multimodal molecular weight distribution are obtained when a catalyst which comprises a chiral metallocene containing bridges and an alumoxane is used for the polymerization of the 1-olefins. The polymers are particularly highly suitable for the production of transparent films.

1-olefin stereoblock polymer, and a process for its preparation

Stereoblock polymers of 1-olefins having long isotactic sequences are obtained at industrially favorable polymerization temperatures using a catalyst which comprises a metallocene compound having cyclopentadienyl radicals which are substituted by chiral groups, and an alumoxane.

Process for the preparation of a 1-olefin stereoblock polymer

In the polymerization of propylene and other higher 1-olefins, polymers which have a high degree of isotacticity and a narrow distribution of molecular weight are obtained in the presence of a catalyst system composed of a zirconium compound which is stereo-rigid and chiral and a linear or cyclic aluminoxane. In addition, the catalyst system is exceptionally active.

Process for the preparation of polyolefins

The present invention relates to a process for the preparation of oligomeric alkylaluminoxanes of the general formulae: ##STR1## in which R=C.sub.1 -C.sub.6 -alkyl, preferably methyl, and n=2-40, preferably 10-20, by reacting aluminum salts containing water of crystallization, preferably aluminum sulfate containing water of crystallization, with an aluminum trialkyl, preferably aluminum trimethyl. Aluminoxanes of this type can be used as a catalyst component in the preparation of high-activity, homogeneous Ziegler catalysts.

Process for the preparation of oligomeric aluminoxanes

The invention relates to a process for the preparation of polyolefins by polymerizing olefins of the formula CH.sub.2 CHR in which R=H or C.sub.1 -C.sub.10 alkyl, on their own or as a mixture, if appropriate together with C.sub.4 -C.sub.12 .alpha.,.omega.-diolefins, in solvents, liquid monomers or the gas phase, at temperatures between -50.degree. and 200.degree. C., using a catalyst system composed of a soluble, halogen-containing transition metal compound of the general formula

A fluidized bed reactor for the pyrolysis of pieces of rubber or the like, especially old tires the reactor comprising a container at the lower part of which there is discharge device for non-volatile pyrolysis products; gas blowing nozzles arranged in a zone above the discharge device for supplying a fluidizing gas and for producing a fluidized bed from material such as sand or alumina added to the reactor; preferably a heating device, especially one comprising heating tubes extending across the container; a gas outlet disposed in the zone above the fluidized bed; and supply means for conveying pieces of material to be pyrolized to the container; this apparatus is characterized by the fact that the gas blowing nozzles are arranged to direct the gas downwardly, that at least one group of nozzles are arranged in a common horizontal plane, and that the material supply device is such that its dimensions are comparable with the cross-sectional surface of the fluidized bed.

Apparatus for the pyrolysis of pieces of rubber or like material,

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Pinneberg, Germany

Walter Kaminsky