Covestro Deutschland Ag

Bayer Materialscience Ag

Lanxess Deutschland Gmbh

Bayer Materialscience, LLC

Covestro Intellectual Property Gmbh & Co. Kg

Bayer Technology Services Gmbh

Futurecarbon Gmbh

Reiner Rudolf

Aurel Wolf

Sigurd Buchholz

Leslaw Mleczko

Ulrich Liesenfelder

Michael Bierdel

Volker Michele

Christian Münnich

Andreas Seidel

Thomas König

Carsten Conzen

Thomas Eckel

Alexander Meyer

Johann Rechner

Klaus Horn

Joerg Reichenauer

Werner Obrecht

Eckhard Wenz

Hans-Jürgen Thiem

Daniel Gordon Duff

Christian Kords

Klemens Kohlgrüber

Alexander Karbach

Achim Feldermann

Peter Capellen

Michael Erkelenz

Heiko Hocke

Thomas Früh

Vera Taschner

Torsten Ziser

Sven Hobeika

Thomas Koenig

Ralph Weber

Christoph Schwemler

Helmut Meyer

Birte Sämisch

Hans-Juergen Thiem

Elmar Bramer-Weger

Klaus Kraner

Jörg Reichenauer

Klemens Kohlgrueber

Birgit Mannel

Maziar Kakhi

Thomas Höhnk

Martin Schmid

Matthias Voetz

Leslaw Mileczko

Martin Lüdeke

Dirk Kurzidim

Matthias Kroh

Birgit Derfuß

A screw element which has an axially asymmetrical screw cross-sectional profile which has at least two construction points located within the screw cross-sectional profile is provided. The screw element is suitable for use in an extruder having two drive shafts which rotate in the same direction and at the same speed, in order to process or produce plastic masses as an extrudate. Also, an arrangement of two identical or different screw elements in an extruder having two drive shafts which rotate in the same direction and at the same speed is provided. An extruder which is equipped with two identical or different screw elements and has two drive shafts which rotate in the same direction and at the same speed is provided. Furthermore, the use of the screw element according to the invention for processing or producing plastic masses is provided.

Screw element having an axially asymmetrical screw profile which has at least two construction points located within the screw profile

A process for extruding plastic compositions is provided. The process comprises providing a multi-screw extruder with screw elements and conveying, kneading, mixing, degassing or compounding the plastic compositions in the multi-screw extruder using the screw elements.

Process for extruding plastic compositions

A masterbatch comprising pigment and demolding agent is provided. The demolding agent is selected from the group comprising low molecular weight polyolefin oils, low molecular weight polyolefin waxes, montan waxes and aliphatic or aromatic carboxylic acid esters of fatty acids and/or fatty alcohols, wherein the pigment content of the masterbatch is from 3 to 70 wt. %, based on the total weight of the masterbatch. The masterbatch is suitable for preparation of a polymer composition having improved pigment dispersion.

Process for improving carbon black dispersion

The present invention relates to polysiloxane-polycarbonate block cocondensates derived from a continuous melt transesterification process comprising polysiloxane blocks of the formula (1) and polycarbonate blocks having recurring units of the formula (2) having improved rheological properties and good mechanical properties as well as to mouldings and extrudates made from these polysiloxane-polycarbonate block cocondensates and wherein the polysiloxane-polycarbonate block cocondensate has a siloxane domain distribution (diameter of siloxane domains) from 200 nm to 1 &#x3bc;m measured by atomic force microscopy and light microscopy which is in the range of 0.01%-2.5%, based on the total number of siloxane domains.

Polysiloxane-polycarbonate block cocondensates with improved rheological properties

The present invention relates to a process for preparing polysiloxane-polycarbonate block cocondensates proceeding from specific polycarbonates and hydroxyaryl-terminated polysiloxanes. More particularly, the present invention relates to the preparation of the said block cocondensates by means of a reactive extrusion.

Preparation of siloxane-containing block copolycarbonates by means of reactive extrusion

The invention relates to a process for extruding plastic compositions. The process in particular relates to the conveying, kneading and/or mixing of plastic compositions, in particular of polymer melts and mixtures of polymer melts, above all thermoplastics and elastomers, particularly preferably polycarbonate and polycarbonate blends, also with the incorporation of other substances such as for example solids, liquids, gases or other polymers or other polymer blends.

Method for extruding plastic masses

The present invention relates to a process for the production of carbon nanotubes, in particular those having a diameter of 3-150 nm and an aspect ratio of length:diameter (L:D)&#x3e;100, by decomposition of hydrocarbons on a heterogeneous catalyst which comprises Mn, Co, preferably also molybdenum, and an inert support material, and the catalyst and the carbon nanotubes themselves and the use thereof.

Catalyst for producing carbon nanotubes by means of the decomposition of gaseous carbon compounds on a heterogeneous catalyst

The present invention relates to a process for the production of carbon nanotubes by decomposition of hydrocarbons on a heterogeneous catalyst in a fluidized bed reactor, wherein the reactor can be operated batchwise or continuously, and in the case of continuous operation discharge can take place with sifting or without sifting.

Process for the production of carbon nanotubes in a fluidized bed

The invention relates to a composition containing at least one microgel, at least one carbon nanotube and at least one organic medium. Said organic medium can be cross-linked or non cross-linked.

Carbon nanotubes and organic media containing microgels

A novel carbon nanotube powder containing carbon nanotubes which have a roll-like structure, also novel carbon nanotubes having a roll-like structure, novel processes for the production of the carbon nanotube powders and of the carbon nanotubes, and their use as an additive or substrate for various applications are described.

Carbon nanotube powder, carbon nanotubes, and processes for their production

The present invention relates to a process for the production of impact-modified filled polycarbonate compositions and molding compositions. A process of the present invention involves: (i) mixing the CNT (component C) with rubber-containing vinyl copolymer (component B) and/or rubber-free vinyl copolymer (component D) on a twin screw extruder, to obtain a CNT masterbatch, (ii) mixing the CNT masterbatch with polycarbonate (component A) and optionally with Component B and/or Component D and optionally with an additive on a twin screw extruder. A polycarbonate composition prepared according to the present invention does not experience degradation of the molecular weight of the polycarbonate during compounding a compared to processes known in the art.

Process for the production of impact-modified filled polycarbonate compositions

Process for the continuous production of catalysts which are useful for the production of carbon nanotubes by decomposition of gaseous carbon compounds.

Process for the continuous production of catalysts

A compounding process is disclosed. The process includes (i) melt blending in an extruder at least two polymeric resins to produce a mixture that includes at least one resin that dissociates to yield monomers and/or oligomers upon heating, said mixture containing less than 1 percent of volatile components, (ii) introducing into said extruder an inert entraining agent, and (iii) removing said entraining agent together with said volatile components from said extruder. The extruder includes at least one melting zone, at least two degassing zones and at least one mixing zone. The end product has a particularly low content of residual solvent and at the same time a low content of monomers or oligomers.

Process for the compounding of polymers

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Leverkusen, Germany

Reiner Rudolf