Bayer Aktiengesellschaft

Wolfgang Nentwig

Peter Schertl

Michael Dauben

R&uuml;diger Engehausen

Manfred Beck

Walter Kaminsky

Wolfgang Wieder

Dieter Kuhlmann

J&uuml;rgen Schneider

Hans-Rafael Winkelbach

Michael Arndt-Rosenau

Maud Guillemot

Oliver Pyrlik

Heinz Hermann Greve

Volker Scholz

Christian Str&uuml;bel

This invention relates to a catalyst system containing bisiminopyridyl complexes of cobalt and/or iron with bulky substituents on the bisiminopyridyl ligand, to a method for the polymerization of &agr;-olefins, particularly ethylene, and to the use of the polyolefins which can be produced by said method for the production of moldings of all types.

Catalyst system for olefin polymerization

The present invention relates to a process for the avoidance of instability during the gas polymerization of rubber comprising the feeding of low volatility monomers supported in a particulate material into a fluidized bed reactor.

Method for avoiding instabilities during gas phase polymerization of rubber

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

Process for the preparation of supported polymerization catalyst systems and use thereof in the homo-and co-polymerization of unsaturated monomers

The production of diene rubbers polymerized by means of Nd catalysts and having reduced cold flow and low intrinsic odor is effected by the polymerization of diolefines adiabatically at temperatures of -20.degree. to 150.degree. C. in the presence of inert organic solvents and in the presence of metallo-organic mixed catalysts based on neodymium carboxylate, by subsequently depressurizing the reaction mixture obtained in this manner by reducing the pressure, and by treating the reaction mixture thereafter with disulphur dichloride, sulphur dichloride and/or thionyl chloride.

Process for producing diene rubbers polymerized by means of Nd catalysts

The production of impact-resistant polystyrene with EPDM simplifies the process and produces improved products if a modified ethylene/propylene rubber consisting of styrene/butadiene- or diene polymers, ethylene, optionally propylene and an unconjugated diene are used as the elastifying component. The modified EPDM rubbers consisting of (a) from 20 to 90% by weight of ethylene units, (b) from 1 to 25% by weight of units of a butadiene/styrene copolymer containing a quantity of from 10 to 90% by weight of styrene, (c) from 0 to 10% by weight of units of an unconjugated diolefin and (d) C.sub.3 -C.sub.18 .alpha.-monolefin units to make up the difference to 100% by weight, are a further subject of this invention.

Modified EPDM rubbers, the production thereof and the use thereof for

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Bergisch Gladbach, Germany

Wolfgang Nentwig