Bayer Aktiengesellschaft

Covestro Deutschland Ag

Bayer Intellectual Property Gmbh

Bayer Materialscience Ag

Lanxess Deutschland Gmbh

Covestro Intellectual Property Gmbh & Co. Kg

Bayer Technology Services Gmbh

Ulrich Liesenfelder

Thomas König

Michael Bierdel

Alexander Meyer

Johann Rechner

Klaus Horn

Martin Ullrich

Reiner Rudolf

Carsten Conzen

Winfried Joentgen

Torsten Groth

Klemens Kohlgrüber

Paul Wagner

Stephan Kirchmeyer

Timo Kuhlmann

Thomas Menzel

Klaus-Peter Heise

Lars Frye

Thomas Koenig

Karl-Robert Boos

Hanns P Muller

Hans-Joachim Traenckner

Hermann Uhr

Hans-Georg Hoppe

Richard Weider

Nikolaus Muller

Lutz Heuer

Johan Vanden Eynde

John Mitchell Huggins

Wolfgang Kaufhold

Herbert Heidingsfeld

Alexander Karbach

Alfred Eitel

Hans-Georg Pirkl

Michael Erkelenz

Jörg Kirchhoff

Torsten Hagen

Hans-Jürgen Thiem

Hanns-Peter M&uuml;ller

Wolfgang Br&auml;uer

Florian Lipski

Jorg Kirchhoff

Dietmar Günther

Ingo Steinmeister

Wolfgang Güdel

Ursula Tracht

Helmut Meyer

Frank Bruynseels

Stefan Moss

Frank D&ouml;bert

Nicolai Krasberg

Karl-Hermann Koeching

Wolfgang R&ouml;hrig

Ute Wollborn

Klemens Kohlgrueber

Stephan Laue

Andreas Frankenau

Ricarda Nothelle

Stefan Schmitz

Carsten Meyer

J&ouml;rgen Weinschenck

Thomas Konig

Karl-Hermann Brucher

Joachim-Reinhard Wesener

Nikolaus M Uller

Roland Engberg

Frank Doebert

Andreas Stremmel

Christoph Biedron

Frank Quaeyhaegens

Johan Decloedt

Paul Van Dorst

Uwe Arndt

Haakan Jonsson

Stephen Böhmer

Jörg Krüger

Karl-Hermann Köching

Hans-J&uuml;rgen Thiem

Gudrun Schmidt

Joerg Kirchhoff

The present invention relates to a method for preparing a polysiloxane-polycarbonate block co-condensate, wherein a siloxane component containing both aliphatic and aromatic groups is used as a mediator. The invention also relates to a polycarbonate composition and also to the use of the special siloxane component for reducing the particle size distribution of the siloxane domains in a polysiloxane-polycarbonate block co-condensate.

Siloxane-containing block copolycarbonates having a small domain size

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

The present invention relates to flame-retardant moulding compositions comprising glass fibre and siloxane-containing polycarbonate block cocondensate, and also to a process for the production of these moulding compositions. The invention further relates to the use of these flame-retardant moulding compositions in injection-moulding and extrusion applications.

Flame-retardant, glass fiber-containing molding compounds containing siloxane-containing polycarbonate block co-condensate

The present invention relates to flame-retardant moulding compositions comprising siloxane-containing polycarbonate block cocondensate, and also to a process for the production of these moulding compositions. The invention further relates to the use of these flame-retardant moulding compositions in injection-moulding and extrusion applications.

Flame-retardant molding compounds containing siloxane-containing polycarbonate block co-condensate

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

A production arrangement for performing a chemical reaction with a standard transport container in accordance with DIN ISO 668 for accommodating a plurality of processing units disposed inside the standard transport container for assisting and/or performing a processing basic operation, and a supply network, disposed inside the standard transport container, for supplying the processing units with material and/or power and/or information. Owing to the supply network disposed inside the standard transport container, the availability of material and/or power and/or information can be ensured over a large area of the standard transport container, such that the same standard transport container with the same supply network can be re-used for different configurations of processing units and, in the event of a modification for performing a different chemical reaction, the processing units can simply be interchanged such that different chemical reactions can be performed with little outlay.

Production arrangement for performing a chemical reaction and use of a standard transport container

The present invention relates to new screw elements for multi-screw extruders with pairs of co-rotating and fully wiping screws.

Screw elements with improved dispersing action and low energy input

Processing unit for assisting and/or performing a processing basic operation for a chemical reaction, with an operating unit for preparing a contribution for the processing basic operation and a frame for accommodating the operating units, the frame having an extension din the longitudinal direction which corresponds substantially to an integral multiple Zof an integral portion Nof an extension L, in the longitudinal direction of an interior of a standard transport container, in accordance with DIN ISO 668, and/or the frame having an extension din the transverse direction with corresponds substantially to an integral multiple Zof an integral portion Nof an extension Lin the transverse direction of an interior of a standard transport container, in particular in accordance with DIN ISO 668, wherein different processing units can be stored in a pool for different processing basic operations and be assembled in modular and flexible manner in the standard transport container for the synthesis of a given chemical product.

Processing unit and use of a plurality of processing units

The invention relates to a process for extruding plastic compositions, in particular 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 with improved optical characteristics, with the assistance of a multi-screw extruder with specific screw geometries.

Method for extruding plastic materials

The invention relates to novel screw elements for multi-screw extruders with screw profiles co-rotating in pairs and being fully self-wiping in pairs, to the use of the screw elements in multi-screw extruders and to a process for extruding plastic compositions.

Screw elements for extruding plastic compositions

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 present invention relates to screw elements with novel, tightly intermeshing, self-cleaning, co-rotating screw profiles for multishaft screw machines with pairs of co-rotating and fully abrading screw shafts, to the use of these screw elements in multishaft screw machines and to a method of generating these screw elements.

Screw elements with reduced energy input during the build-up of pressure

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 screw elements for multiscrew extruders with pairs of co-rotating and fully wiping screws, to the use of these screw elements in multiscrew extruders and to a method of generating screw elements according to the invention.

Screw elements with reduced sweep angle

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Bergisch Gladbach, Germany

Ulrich Liesenfelder