Lanxess Deutschland Gmbh

Bayer Aktiengesellschaft

Other

Stephen D Pask

Lothar Reif

Dirk Achten

Sharon X Guo

Christopher Ong

Werner Obrecht

Hui Li

Oskar Nuyken

Rudiger Musch

Zsolt Szentivanyi

Rafael Warsitz

Wolfgang Wieder

Claus Wrana

Franz-Josef Mersmann

Brigitte Isabell Voit

Christian Ohm

Lan Lu

Karl-Heinz Schabel

Kay Varnhorn

Michael Walter

Franz Mersmann

Gregor Dudziak

Carsten Fischer

Thomas Knepper

Axel Vischer

Andre Damman

Stephan Schroeder

The present invention provides a vulcanizable composition containing a specific hydrogenated nitrile rubber, at least one cross-linking agent and carbon nanotubes, a process for preparing such composition and the use thereof for preparing vulcanizates. Said vulcanizates exhibit excellent heat performance, oil resistance and mechanical strength.

Carbon nanotube containing rubber compositions

Novel crosslinkable compositions are provided and are based on thermoplastic polymers and elastomers, these compositions comprising, as crosslinking system, specific organic salts of metal ions. Ionically crosslinked thermoplastic elastomers can be obtained therefrom and have excellent physical properties, high-temperature resistance extending above 150&#xb0; C., and also oil resistance. They can be used for production of moldings.

Crosslinkable compositions, thermoplastic elastomers obtainable therefrom and their use

A novel process is used to prepare synthetic rubbers (B) which feature very narrow molecular weight distribution and a correspondingly low value for the polydispersity index. The preparation process encompasses the treatment of a synthetic rubber with ultrasound, where the resultant synthetic rubber (B) has a lower weight-average molecular weight (M) than the synthetic rubber (A) used. The resultant synthetic rubbers (B) have excellent suitability for processing via extruder processes or injection-molding processes.

Synthetic rubber with narrow molecular weight distribution, a process for its preparation and a method of use

New polymer concentrates on the basis of polymer additives, like e.g. fillers and flame-retardants, are provided which have in particular an increased bulk density compared to the polymer additives as such. This increased bulk density leads to a substantial improvement in the processability of such concentrates, their dispersibility during compounding and the properties of the resulting polymer compound. Processing improvements include less dust, faster processing and more homogeneous additive dispersion. The invention also provides a process for preparing such new polymer concentrates, a process for preparing polymer compounds containing the new polymer concentrates, the respective polymer compounds and a process for preparing formed parts thereof. Such formed parts have more uniform properties such as density, wall thickness, and in case of the flame-retardants more homogeneous and consistent flame retardancy.

Polymer concentrates with improved processability

A novel process is used to prepare synthetic rubbers (B) which feature very narrow molecular weight distribution and a correspondingly low value for the polydispersity index. The preparation process encompasses the treatment of a synthetic rubber with ultrasound, where the resultant synthetic rubber (B) has a lower weight-average molecular weight (M) than the synthetic rubber (A) used. The resultant synthetic rubbers (B) have excellent suitability for processing via extruder processes or injection-moulding processes.

A novel process produces a novel hydrogenated nitrile rubber (B) which features a very narrow molecular weight distribution and a correspondingly low value for the polydispersity index. The preparation process encompasses the treatment of a hydrogenated nitrile rubber (A) with ultrasound, whereupon the resultant hydrogenated nitrile rubber (B) has a lower weight-average molecular weight (M) than the hydrogenated nitrile rubber (A). The resultant hydrogenated nitrile rubber (B) has excellent suitability for the production of mouldings via processing by extrusion processes or by injection-moulding processes.

Hydrogenated nitrile rubber with narrow molecular weight distribution, a process for its preparation and a method of use

The present invention provides a novel process for preparing hydrogenated nitrile rubbers comprising subjecting nitrile rubbers in a spinning disk reactor to hydrogenation. The present process is less demanding with regard to its reaction conditions, like e.g. the hydrogen pressure to be applied, compared to known processes and significantly reduces the cost of the hydrogenation process and in particular the equipment cost.

Process for preparing hydrogenated nitrile rubbers

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

Aryldiazosulphonates having polymerizable ethylenically unsaturated groups are excellent starting materials for water-soluble homopolymers and copolymers, which can be converted to water-soluble polymers by irradiation. Thus, the polymers can be utilized for the preparation of aqueous coating compositions.

Polymerizable aryldiazosulphonates diazosulphonate groups and

The present invention relates to thermoplastically processible polymer materials with good mechanical properties and high flame resistance.

Flame resistant, halogen-free thermoplastic polymer compositions

An improved process for the production of polymers having halogen end groups from cationically polymerizable monomers, the monomer being polymerized in an inert solvent at a temperature of from +10.degree. to -130.degree. C. using a catalyst system consisting of a metal halide and an organic halide, compounds corresponding to the following general formula being used as organic halides: ##STR1## wherein X represents a halogen atom;

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Dormagen, Germany

Stephen D Pask