Bayer Aktiengesellschaft

Lanxess Deutschland Gmbh

Kernforschungsanlage Julich Gesellschaft MIT Beschrankter Haftung

Bayer Akteingesellschaft

Gerd Sylvester

Josef Witte

Heike Windisch

Gunter Marwede

Werner Obrecht

Hugo Vernaleken

Helmut Waniczek

Kurt P Meurer

Steffen Maiwald

Rudolf Taube

Rudolf Casper

Wolfgang Baade

Christian Ohm

Hugo Zimmermann

Thomas Knauf

Herbert Bartl

Manfred Beck

Rudolf Schulten

Akhtar Osman

Karl-Heinz Reichert

Gottfried Pampus

Kurt-Peter Meurer

Michael Dauben

J&uuml;rgen Schneider

Claudia Schmid

Udo Sondermann

Peter Marquardt

Jasbir Singh

Theodor Overhoff

Cristina Stere

G&uuml;nter Marwede

Bernhard Will

Bernhard A Wolf

Jurgen Giesemann

Thomas Ruhmer

Christopher Eberstein

Birgit Garmatter

J&uuml;rgen Giesemann

Thomas Rosenstock

Bernd Stollfuss

Nobert Steinhauser

Kurt P Meuer

Kurt P Neurer

The random, hydrogenated copolymers according to the present invention of unsubstituted conjugated dienes and substituted conjugated dienes, having a glass transition temperature of &#x2266;&#x2212;60&#xb0; C., an enthalpy of fusion of &#x2266;100 J/g and a content of residual double bonds in the range from 0 to 80%, are suitable for the production of rubber moldings of all kinds which have good resistance to ageing and high resilience at low temperatures. In particular, various tire components and industrial rubber articles may be mentioned as rubber moldings. The copolymers are also suitable for the rubber modification of brittle thermoplastics.

Hydrogenated copolymers of unsubstituted and substituted conjugated dienes

The present invention relates to a process for the copolymerization of conjugated diolefins with non-conjugated olefins in the presence of rare earth metal catalysts. The advantages of the process according to the invention are in particular the high selectivity, good space-time yield and the possibility of being able to vary the reaction conditions within a wide range.

Copolymerization of conjugated dienes with non-conjugated olefins by means of rare earth catalysts

The present invention relates to a catalyst system for gas phase polymerization of conjugated dienes, consisting of a rare earth compound, an aluminum organic compound, a further Lewis acid, optionally a conjugated diene, an inert inorganic or organic support and a co-catalyst applied to an inorganic support, in order to improve the flowability of rubber thus produced.

Catalyst system for gas phase polymerization of conjugated dienes

This invention relates to a method for the suspension polymerization of conjugated dienes in hydrocarbon mixtures comprising a fraction by volume greater than 80% of C hydrocarbons wherein polymerization is conducted in the presence of a rare earth compound, of one or more aluminum compounds, and optionally of an additional Lewis acid. The invention further relates to the polymers which can be produced according to the present invention and to the use thereof for the production of moldings of all types, particularly tires and industrial rubber products, and for blending with polystyrene (HIPS).

Method for the suspension polymerization of conjugated dienes

This invention relates to a process for the production of polydienes having controlled Mooney viscosity, carried out by means of catalysts based on rare earth compounds, which is characterized in that the conjugated dienes used are polymerized in the presence of from 0.005 to 80 wt. % of 1,2-dienes, based on the sum of conjugated dienes used and of 1,2-dienes used. The polydienes thus produced are used particularly in the manufacture of car tires.

Method for the production of polydienes with regulated mooney viscosity

Compounds of the rare earths and their use as polymerization catalysts for unsaturated compounds

The present invention relates to a supported cobalt catalyst consisting of

Supported cobalt catalyst, production thereof and use thereof for the

Gas-phase polymerisation of conjugated dienes in the presence of rare

Diene rubbers are produced in the gas phase by first polymerizing the dienes or diene mixtures in the presence of a catalyst system, which is based on rare earth compounds, at temperatures of from 0 to 150.degree. C. and at pressures of from 1 mbar to 50 bar, so that a pourable diene rubber having a Mooney viscosity ML (1+4', 100.degree. C.) of 70 to 180 Mooney units is obtained, and subsequently subjecting the pourable diene rubber obtained to a chemical or thermal decomposition reaction until a Mooney viscosity of 10 to 70 Mooney units is obtained.

Method for the production of diene rubbers in the gas phase

Catalyst its production and its use for the gas-phase polymerization of

Catalyst for the gas-phase polymerisation of conjugated dienes

Catalyst, its production and its use for the gas-phase polymerization of

A solution polymerisation process carried out continuously in a cascade produces high molecular weight gel-free ethylene terpolymers having on the one hand high resistance to fuels, oils and organic solvents and on the other hand high flexibility even at low temperatures when narrow ranges are adhered to in respect of solvent content, pressure, temperature control and degree of conversion.

Continuous process for the production of ethylene/vinyl ester terpolymers

Ethylene/vinyl acetate copolymers containing very high molecular weight components and having a reduced tendency to tackiness may be obtained by a further addition of ethylene during the process of solution polymerization at a moderate pressure.

Process for the preparation of ethylene/vinyl acetate copolymers with

The present invention relates to poly-(C.sub.2 -C.sub.10 -.alpha.-olefine)-carboxylic acids of Mw (weight average) 2000 to 350,000, to their preparation by oxidative degradation of polyolefines or by reaction of 'Living' polyolefines with CO.sub.2, to their conversion into poly-(C.sub.2 -C.sub.10 -.alpha.-olefine)-carbonyl halides and to their use for preparing polyolefine/polycarbonate block copolymers and the block copolymers obtainable by the process according to the invention.

Polyolefinecarboxylic acids, their preparation and their use for

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Leverkusen, Germany

Gerd Sylvester