Evonik Degussa Gmbh

Evonik Operations Gmbh

Degussa Aktiengesellschaft

Roland Wursche

Franz-Erich Baumann

Sonja Bollmann

Harald Haeger

Andreas Dowe

Kirsten Alting

Sylvia Anita Hermasch

Rainer Goering

Karl Kuhmann

Goetz Baumgarten

Harald Häger

Martin Himmelmann

Martin Wielpuetz

Beate Krause

Kirsten Luetzeler

Georg Schaefer

Petra Poetschke

Robert Socher

Wolfgang Lortz

Martin Roos

Hans Ries

Kathrin Lehmann

Rolf Schneider

Matthias Seiler

Thomas Hasskerl

Jürgen Herwig

Juergen Herwig

Juergen Franosch

Stefan Bernhardt

Franz Michlbauer

Peter Kreis

Michael Kroell

Klaus Hülsmann

Rainer Göring

Michael Beyer

Marina Lazar

Martin Wielpütz

Helmut Hausner

Michael Kröll

Jürgen Franosch

Lothar Jakisch

Götz Baumgarten

Michael Böer

Florian Schwager

Clemens Jacobs

Dagmar Kaufhold

Berthold Teloeken

Claudius Neumann

Christian Schnitzer

Guenther Ittmann

Klaus-Dieter Schuebel

Dieter Adam

Petra Pötschke

Kirsten Lützeler

A process has the ability to produce polyalkenamer-containing compositions. Stages of the process include converting at least one cycloalkene by ring-opening metathetic polymerization to obtain a polyalkenamer-containing product mixture, and working up the product mixture to remove at least one of a monomer and an oligomer of the at least one cycloalkene to obtain the polyalkenamer-containing composition. The working up stage is effected by a diafiltration.

Process for preparing polyalkenamers for packaging applications

The present invention relates to a process for producing cycloalkenamer-containing compositions and to such cycloalkenamer-containing compositions. The invention further relates to the use of these cycloalkenamer-containing compositions in the field of packaging materials, especially for food and drink.

A process for producing cycloalkenamer-containing compositions involves converting at least one cycloalkene by ring-opening metathetic polymerization to obtain a polyalkenamer-containing product mixture. The product mixture is worked up to remove monomers and oligomers of the cycloalkenes to obtain the polyalkenamer-containing composition by extraction with CO. The extraction involves at least two stages: an extraction with liquid COunder the supercritical conditions, and then an extraction with supercritical CO. Such cycloalkenamer-containing compositions can be used, for example, in the field of packaging materials, especially for food and drink.

Multiple layer film and composite material produced therefrom

A polyamide composition contains the following components: (a) at least 40 parts by weight PA12; (b) 0.1-15 parts by weight of at least one salt with a non-metallic cation; (c) 0.1-25% by weight of at least one dispersant based on esters or amides; (d) a quantity of carbon nanotubes that produces in the molding compound a specific surface resistance according to IEC standard 60167 of maximum 10-10&#x3a9;; (e) 0-5 parts by weight of at least one metal salt; and optionally (f) conventional auxiliary substances and additives, the sum of the parts by weight of components (a) to (f) amounting to 100. The polyamide composition can be used for manufacturing moldings with improved electrical conductivity and improved surface quality.

Polyamide 12 composition containing carbon nanotubes

A polyamide composition comprising the following components: a) at least 40 parts by weight of a polyamide whose monomer units contain an arithmetic average of at least 7.5 carbon atoms, b) 0.1 to 15 parts by weight of at least one salt with a non-metallic cation, c) 0.1 to 25 parts by weight of at least one dispersant based on esters or amides and d) an electrically conductive carbon selected from the group of carbon black, graphite powder, carbon fibers, carbon nanotubes and/or graphene, in an amount which results in a specific surface resistance of the polymer composition to IEC 60167 of 10to 10&#x3a9;, e) 0 to 5 parts by weight of at least one metal salt, and optionally f) customary assistants and additives, where the polyamide of component a) is not a PA12 if carbon nanotubes are present as component d), and where the sum of the parts by weight of components a) to f) is 100, can be used for production of mouldings with improved electrical conductivity and improved surface quality.

Composition of polyamides with low concentration of carboxamide groups and electrically conductive carbon

A polyamide composition which provides moldings having a significantly reduced percolation threshold and an improved electrical conductivity is provided. The composition contains a) at least 40 parts by weight of a polyamide; b) from 0.15 to 25 parts by weight of an electrically conductive carbon; c) from 0.3 to 8 parts by weight of an oligofunctional compound; and, optionally, d) conventional auxiliaries and additives, wherein the electrically conductive carbon comprises at least one of carbon nanotubes and graphene, the oligofunctional compound comprises at least one functional group reactive with reactive groups on a surface of the electrically conductive carbon and at least one functional group reactive with an end group of the polyamide, and the sum of the parts by weight of the components a) to d) is 100.

Polyamide composition containing electrically conductive carbon

A method of fractionating a dispersion of oxidic nanoparticles wherein at least one step of the method is a membrane crossflow filtration step, the flow of the dispersion over the membrane being brought about by means of driven rotating parts; and dispersions of oxidic nanoparticles that are obtainable by the method.

Method of fractionating oxidic nanoparticles by crossflow membrane filtration

A process for producing moldings with condensing-up of a polyamide molding composition whose polyamide component contains, as a result of the method of preparation, at least 5 ppm of phosphorus in the form of an acidic compound by means of a compound having at least two carbonate units, wherein

Process for producing moldings with an increase in the melt stiffness

A film whose outer layer is composed of a molding composition which is in essence composed of the following components:

Polyamide blend film

A polyamide molding composition which can be used for production of a printable or printed item contains a) at most 90 parts by weight of a polyamide obtained from a lactam or from an amino carboxylic acid having at least 10 carbon atoms; and b) from 10 to 100 parts by weight of PA1010, wherein a total of components a) and b) is 100 parts by weight.

Transparent molding composition

The invention relates to the use of a molding composition which comprises at least 50% by weight of a copolyamide, which is composed of the following monomer combination:

Transparent moulding compound

Multilayer composites are obtained from a molding composition which contains the following components:

Use of a polyamide molding composition with high melt stiffness for coextrusion with a high-melting-point polymer

The present invention relates to compositions for producing membranes, the compositions comprising at least 0.1% by weight of highly branched polymer, at least 0.5% by weight of linear polymer and at least 30% by weight of solvent. The present invention additionally describes membranes obtainable from the compositions, and methods of producing these membranes.

Gas separation membranes

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Duelmen, Germany

Roland Wursche