Bayer Aktiengesellschaft

Lanxess Deutschland Gmbh

Bayer Corporation

Arlanxeo Deutschland Gmbh

Lanxess International Sa

Franz-Josef Mersmann

Werner Obrecht

Paul Wagner

Hanns-Ingolf Paul

Heiko Herold

Zsolt Szentivanyi

Rolf Feller

John Lovegrove

Matthias Soddemann

Thomas Koenig

J&uuml;rgen Schneider

Jorg Kirchhoff

Friedrich Haendeler

Dirk Achten

Leslaw Mleczko

Gilles J Arsenault

Paul Nguyen

Christopher Ong

Stephen D Pask

Rafael Warsitz

Harald Bender

Michael Dauben

Klaus Schebesta

Norbert Schweigler

Claus Riehle

Johann Hohn

Gregor Dudziak

Ignazio Spadola

The present invention relates to a process for the production of water and solvent-free hydrogenated nitrile rubber polymers, to the hydrogenated nitrile rubbers and the use thereof.

Process for the production of water and solvent-free hydrogenated nitrile rubbers

Novel optionally hydrogenated nitrile rubbers distinguised by a very low ruthenium content are provided as well as a process for the removal of ruthenium-containing catalyst residues from a solution of optionally hydrogenated nitrile rubber by using specific functionalized ion-exchange resins.

Process for removing ruthenium-containing catalyst residues from optionally hydrogenated nitrile rubber

The present invention relates to a method for the preparation of purified elastomers prepared by emulsion polymerization, wherein the level of impurity is reduced by up to 99 wt. %, expressed in terms of the unpurified elastomer. The present invention also relates to elastomers which can be obtained by the method according to the present invention, to the use of the elastomers for the production of all types of products, and to the product which is produced by processing the elastomer which can be obtained by the method according to the present invention.

Method for the preparation of purified elastomers from solution

A process is provided for the removal of iron- and rhodium-containing residues from a solution of hydrogenated nitrile rubber. The process utilizes an ion-exchange resin having thiourea functional groups. Further, the resin is both macroporour and monodispersed. The process removes both rhodium and iron from viscous rubber solutions. In a preferred embodiment, the process is carried out in an ion-exchange column.

Process for removing iron-and rhodium-containing catalyst residues from hydrogenated nitrile rubber

The present invention relates to a process for the continuous discharge of pre-classified polymer particles, particularly rubber particles, from a gas phase polymerization reactor, comprising the steps of classifying the polymer in a classifier, discharging the particles with a sufficient size and conveying the undersized particles back into the gas phase polymerization reactor.

Gas-phase polymerization in a bell-shaped reactor

Method and device for extracting rubber from gaseous phase polymerization

The invention relates to a process for the preparation of partially hydrogenated nitrile rubbers with defined residual double bond contents of between 2.0 and 5.0%, preferably 3.0 and 4.5%.

Process for the preparation of partially hydrogenated nitrile rubbers

Growing community of inventors

Bergisch Gladbach, Germany

Franz-Josef Mersmann