Bayer Aktiengesellschaft

Lanxess Deutschland Gmbh

Arlanxeo Deutschland Gmbh

Rhein Chemie Rheinau Gmbh

Continental Aktiengesellschaft

Bayer Materialscience Ag

Lanxess Corporation

Bayeraktiengesellschaft

Lanxess International Sa

Elcomax Membranes Gmbh

Technische Universitat Munchen

Ems-patent Ag

Futurecarbon Gmbh

Werner Obrecht

Oskar Nuyken

Peter Wendling

Thomas Früh

Thomas Scholl

Eberhard Muller

Winfried Jeske

Julia Maria Müller

Torsten Ziser

Rudiger Musch

Anthony Sumner

Norbert Steinhauser

Wilhelm Gobel

Ulrich Eisele

Christopher Ong

Wolfgang Baade

Martin Schneider

Julia Maria Jeschko

Patrick Galda

Gerd Sylvester

Zsolt Szentivanyi

Ludger Heiliger

Achim Fessenbecker

Rudolf Casper

Heike Windisch

Franz-Josef Mersmann

Sarah David

Michael Well

Andreas Bischoff

Christian Ohm

Cristina Stere

Paul Wagner

Gisbert Michels

Hanns-Ingolf Paul

Rolf Feller

John Lovegrove

Gerhard Langstein

Michael Klimpel

Zhenli Wei

Susanna Lieber

Claus Wrana

Qingchun Liu

Matthias Soddemann

Martin Mezger

Thomas Koenig

Michael Happ

Hubert Sutter

Jorg Kirchhoff

Hans-Josef Buysch

Dirk Achten

Peter Panster

Hugo Vernaleken

Botho Hoffmann

Leslaw Mleczko

Aurel Wolf

Adolf Schmidt

Hartmuth Buding

Stefan Wieland

Burkhard Köhler

Heinrich Schrage

Johannes Kaulen

Leonid Modestovich Kustov

Claus Dreisbach

Joachim Thormer

Oliver Gronwald

Hans Magg

Volker Michele

John W Goossens

Georg Stoeppelmann

Sigurd Buchholz

Jens Herwig

Reiner Rudolf

Martin Bohnenpoll

Stephen D Pask

Dieter Melzner

Hans-Wilhelm Engels

Heiko Tebbe

Wolfgang Wieder

Karola Schneiders

Lothar Reif

Christian Münnich

Domnik Bayer

Georg Stöppelmann

Daniel Gordon Duff

Andreas Kaiser

Annette Reiche

Judit E Puskas

Thomas Gross

Hiyam Salem

Wilfried Braubach

Manfred Abele

Uwe Denninger

Kurt-Peter Meurer

Lothar Steger

Thomas Fr&uuml;h

Karl-Heinz Schabel

Irene Moll

Udo Sondermann

Peter Kueker

Axel M&uuml;ller

The present invention relates to a process for preparing nitrile rubbers having reduced molecular weight by metathesis of a first nitrile rubber in the presence of specific ruthenium complex catalysts that have particular N-heterocyclic carbene ligands.

Process for producing nitrile rubbers using ruthenium complex catalysts

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

The present invention relates to functionalized copolymer rubbers containing nitrile groups and to the preparation thereof, to vulcanizable mixtures comprising functionalized copolymer rubbers containing nitrile groups and to the preparation thereof, and to vulcanizates based on functionalized copolymer rubbers containing nitrile groups, to the preparation thereof and to the use thereof as technical material.

Functionalized copolymer rubber containing nitrile groups

Catalyst compositions based on Ruthenium- or Osmium-based complex catalysts and specific co-catalysts are provided for selectively hydrogenating nitrile rubbers in the presence of such catalyst compositions.

Catalyst compositions and their use for hydrogenation of nitrile rubber

This invention relates to novel catalyst compositions based on Ruthenium- or Osmium-based complex catalysts of the Grubbs-Hoveyda, Grela or Zhan type and specific co-catalysts comprising at least one vinyl group, pref. ethyl vinyl ether, and to a process for selectively hydrogenating nitrile rubbers in the presence of such catalyst compositions, preferably with a preceding metathesis step using the same complex catalyst as in the hydrogenation step.

A copolymer rubber includes, based on a total amount of 100% by weight of all monomer units, &#x3b1;,&#x3b2;-ethylenically unsaturated nitrile units, conjugated diene units, and &#x3b1;,&#x3b2;-ethylenically unsaturated monocarboxylic acid monoester units selected from the group consisting of methoxyethyl (meth)acrylates, and polyethylene glycol (meth)acrylates. The rubber has a glass transition temperature lower than &#x2212;20&#xb0; C., an oil swelling of not more than 20 vol %, and provides a balance of good low-temperature stability and oil resistance.

Copolymer rubber containing nitrile groups

The present invention is related to a process for the preparation of polymers containing amino groups by hydrogenation of nitrile groups containing polymers by heterogeneous catalysis.

Process for the preparation of polymers containing amino groups employing a heterogeneous iron catalyst

Provided are new functionalized nitrile rubbers, which may optionally also be in partially or wholly hydrogenated form, and also a process for preparing them by metathesis of nitrile rubbers in the presence of a metathesis catalyst and at least one functionalized allyl compound. The new functionalized nitrile rubbers are suitable for producing vulcanizable mixtures and allow the production of vulcanizates having very stable networks. Also made possible, in particular, is the synthesis of block copolymers.

Functionalized nitrile rubbers and the production thereof

A process of degrading nitrile rubbers comprises subjecting them to a metathesis reaction in the presence of specific catalysts with increased activity.

Process for degrading nitrile rubbers in the presence of catalysts having an increased activity

A method and apparatus for disintegrating an elastomer is provided. The elastomer is moved across a base relative to a cutting tool and toward the cutting tool. The cutting tool has a cutting wedge, which has a cutting edge and a rake face adjacent to the cutting edge. After the cutting wedge comes into contact with the elastomer, the elastomer is first at least partially compressed only by the rake face between the rake face and the base before the cutting edge cuts through the elastomer. An elastic evasive movement of the elastomer is avoided because of the initial planar compression of the elastomer by the rake face. Thus, it is possible to cut off significantly thinner pieces from the elastomer.

Method for disintegrating an elastomer and disintegrator

Provided are new partially hydrogenated nitrile rubbers which are distinguished by a specific ratio of viscosity to molecular weight, and also vulcanizable mixtures and vulcanizates based on said rubbers, and also the associated preparation processes. The partially hydrogenated nitrile rubbers lead to compounded formulations having advantageous processing properties in conjunction with excellent vulcanizate properties.

Partially hydrogenated nitrile rubbers

A novel vulcanizable composition is provided, based on at least one hydrogenated nitrile rubber, on at least one peroxide, on at least one unsaturated carboxylic acid and/or salts thereof, and also on specific microgels. These vulcanizable compositions can be used to obtain vulcanized products which can in particular be used for drive belts, roll coverings, hoses and cables.

Microgel-containing vulcanizable composition based on hydrogenated nitrile rubber

An improved polymerization and process method allows the production of special nitrile rubbers which are characterized by a specific anion content and an excellent storage stability and allow a particularly good vulcanization rate and moreover result in vulcanized materials that have advantageous properties, especially with regard to the contact with metal components of molded parts based on said vulcanized materials.

Nitrile rubbers which optionally contain alkylthio terminal groups and which are optionally hydrogenated

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Moers, Germany

Werner Obrecht