Bayer Aktiengesellschaft

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Wolff Walsrode Ag

Bayer Materialscience Ag

Ge Bayer Silicones Gmbh & Co. Kg

Bayer Technology Services Gmbh

Bernd Klinksiek

Frank Herre

J&ouml;rg Hofmann

Stephan Ehlers

Manfred Bock

Lothar Kahl

Christian Wamprecht

Wieland Hovestadt

Nusret Yuva

Hildegard Schnoring

Rolf-Volker Meyer

Pieter Ooms

Stanislav Kazda

Jörg Hofmann

Gunter Weber

Klaus Nachtkamp

Harald Pielartzik

Gisbert Michels

Ottfried Schlak

Hans-Jürgen Nolte

Richard Weider

Harry Krumma

Manfred Bucheler

Lars Obendorf

Dieter Schleenstein

Hans Gehringer

Jose F Pazos

Bernd Koglin

Christian Steinlein

Detmar Redeker

Benno Franz Ulfik

Hans-Joachim Wollweber

Bert Klesczewski

Michael Vom Felde

Thorsten Fechtel

Franz F&ouml;hles

Markus Mechtel

Christoph Irle

Theodor Engbert

Wolfram Wagner

Oswald Wilmes

Klaus Schubert

Rolf Gertzmann

Armand De Montigny

Peter Serno

Robert Horst Bloodworth

Wilhelm Bier

Olaf Halle

Stefan Groth

Gerhard Jonschker

Klaus Schlossmann

Wolfgang Wirth

Peter R Nyssen

Hermann Kober

Erhard Herrmann

Martin Hoch

Dietmar Kalz

Gerd Linder

Klaus Wangermann

Hans-Josef Behrens

Karl Reizlein

Ferdinand Kummeler

Helmut Ohse

Manfred Zimmermann

Raymond D Burk

Andreas Endesfelder

Beatrix Frauendorf

Klaus-Wilfried Wanken

Klaus Rall

Heinz J Niessen

Rainer Elbert

Alfred Zembrod

Gunter Heinrich

Bernd Krumbach

Ulrich Esser

Carsten Gerdes

Stephan H&uuml;tte

Eckhard Wendt

J&uuml;rgen Sdebik

Joong-In Kim

Ralph Ostarek

Said Mahiout

Alan Viets

Ulrike Dellwo

Philip Yeske

Jürgen Hinderer

Matthias Ruhland

J&uuml;rgen Scholz

Wolfgang 35e,uml/a/ Cker

Hans-J&uuml;rgen Hamann

Ricarda-Christine Nothelle

J&uuml;rgen Hinderer

Otto Schmid

Franz Föhles

A process for the continuous production of an aqueous polyurethane dispersion based on at least one aliphatic and/or aromatic polyisocyanate is described, which is characterised by the following steps:

Process for the continuous production of an aqueous polyurethane dispersion

The invention relates to a process for the production of aqueous two-component polyurethane lacquer emulsions, with variable throughput, and to the use thereof as high-quality lacquers and coatings.

Adjustable jet disperser for producing aqueous two-component polyurethane paint emulsions

The invention relates to a dispersing device wherein the dispersed material has a variable throughput comprising a jet disperser which comprises at least one inlet for the materials to be dispersed, a chamber with a multiciplicity of openings arranged in rows along the chamber wall, which lead into an outlet chamber, and an outlet for the finally dispersed material, wherein the chamber comprises a displaceably mounted piston which, depending on its position within the chamber, partially or completely shuts off a specific number of the openings for the passage of the flow os dispersed material.

Dispersion nozzle with variable throughput

Finely divided polysacharide derivatives are described. The finely divided polysacharide derivatives are prepared by a process comprising: a) forming an aqueous composition comprising a polysaccharide derivative and water, in which the polysaccharide derivative is soaked or dissolved; b) converting the polysaccharide derivative of the aqueous composition into finely divided solid particles by, (i) contacting the aqueous composition with superheated water vapor in a dryer-pulverizer; or (ii) causing the polysaccharide derivative of the aqueous composition to flocculate; and c) optionally drying the finely divided solid particles of step b). The primary structures of the polysaccharide starting material are largely removed, and the product has a shape factor of less than 5 and greater than or equal to 1.

Finely divided polysaccharide derivatives

The invention provides an improved process for the preparation of double metal cyanide (DMC) catalysts for the preparation of polyether polyols by polyaddition of alkylene oxides on to starter compounds containing active hydrogen atoms, in which aqueous solutions of a metal salt and a metal cyanide salt are first reacted in the presence of an organic complexing ligand and optionally one or more further complex-forming components to form a DMC catalyst dispersion, this dispersion is then filtered, the filter cake is subsequently washed with one or more aqueous or non-aqueous solutions of the organic complexing ligand and optionally one or more further complex-forming components by a filter cake washing and the washed filter cake is finally dried, after an optional pressing out or mechanical removal of moisture.

Method for producing double metal cyanide (DMC) catalysts

The invention relates to an improved method of producing double-metal cyanide (DMC) catalysts for the production of polyether polyols by polyaddition of alkylene oxides to starter compounds containing active hydrogen atoms, in which the DMC catalyst dispersion is produced using a mixing nozzle, preferably a jet disperser. The DMC catalysts produced in this way have an increased activity in polyether polyol production, reduced particle size and narrower particle size distribution.

Process for producing DMC catalysts

The present invention relates to a process for the production of polyether polyols by polyaddition of alkylene oxides onto starter compounds containing active hydrogen atoms conducted in the presence of a double-metal cyanide catalyst wherein a reaction mixture is guided at least once through a zone which has an energy density of at least 10 J/m and wherein the residence time of the reaction mixture in this zone is at least 10 seconds per pass.

Process for the preparation of polyether polyols

The present invention relates to a process for the production of a polyether polyol by polyaddition of an alkylene oxide onto a starter compound containing active hydrogen atoms conducted in the presence of a double metal cyanide catalyst comprising conducting a reaction mixture at least once through a zone which has an energy density of at least 5&times;10 J/m , wherein the dwell time of the reaction mixture in this zone is at least 10 seconds per pass.

Process for producing polyether polyols

The invention relates to a coating compound for fibers and to a process for the production thereof The invention relates in particular to a preparation agent for elastanes, based on a dispersion of fatty-acid metal salts and an agglomeration inhibitor in polyorganosiloxanes and mineral oils. The preparations are produced by a precipitation process from which fined-particle and sedimentation-stable dispersions with a narrow particle size distribution are obtained which are free from agglomerates.

Coating compound for fibres

In the procedure for the production of a formulation of parenterally administrable pharmaceutical preparations, a liposome dispersion is used as a carrier for a pharmaceutical active compound. For the preparation of the liposome dispersion, an aqueous predispersion of one or more amphiphilic substances is fed to a high-pressure homogenizer in which the predispersion is pumped under a pressure from 600 bar to 900 bar through a homogenizer nozzle (,) having a diameter of 0.1 to 0.5 mm. The homogenizer nozzle has an inlet channel (,) and an outlet channel (,) and consists of a hard ceramic plate (,), in which the bore (,) is present, pressed into a steel body (,). The inlet channel (,) and the outlet channel (,) are likewise incorporated into the steel body (,).

Method and device for producing a parenteral medicament

The invention relates to a new, particularly economic process for preparing pulverulent polysaccharide derivatives, in particular cellulose derivatives, having a thermal flocculation point; the process comprises soaking or dissolving the polysaccharide derivative in a solvent or mixed solvent, dividing/comminuting the soaked or dissolved polysaccharide derivative by thermal and/or mechanical liquid separation and an optional drying step.

Process for preparing fine-particle polysaccharide derivatives

A method and a device for producing a dispersed mixture from at least two phases. To do this, the first and the second phase are subdivided into split streams so that the split streams from the first phase are located on a first flat layer and the split streams from the second phase are located on a second flat layer, the split streams of the first phase inside the flat layer being fed onto the split streams of the second phase at an angle in order to bring about a dispersion and mixing process, wherein the flat layers are directly arranged on top of each other, and parallel to each other. The device consists of at least one base unit containing two foils into which a parallel assembly of grooves is inserted on one side of each foil. Both foils are configured in the base unit such that the sides of the foils fitted with grooves lie on top of each other and form an angle with each other.

Method and device for producing a dispersed mixture via crossing partial flows

An aqueous coating composition including a combination of hydroxyl group-containing polyols and blocked polyisocyanate cross-linking agents, which dries preferably in pulverulent manner on the surface to be coated and, after stoving, affords coatings having a high resistance to water, chemicals and solvents, in particular on metallic substrates, and a process for the production of the coating composition.

Aqueous coating composition for stoving finishes and process for the production thereof

A continuous process for the manufacture of impact resistant polymers is disclosed. The process comprise polymerization of a reaction mixture containing vinylaromatic monomers in the presence of soluble rubber and entails shearing at least some of said mixture at a rate of more than 30000 1/s using a device having no rotating parts. The resulting product is characterized in its low gloss and improved impact properties.

Process for the manufacture of impact resistant modified polymers

Stable polymer dispersions with polymer particle sizes of 0.1 to 10 .mu.m are prepared by dissolving a water-in-oil emulsion, comprising a polymer dissolved in an organic solvent which is immiscible with water (organic phase) and an aqueous phase, wherein the viscosity of the organic phase is 1.0 to 20,000 mPas (measured at 25.degree. C.), the surface tension between organic and aqueous phase is 0.01 to 30 mN/m, the particle size of the water emulsified in the organic phase is 0.2 to 50 .mu.m and the ratio by volume of organic phase to aqueous phase is in the range 80:20 to 20:80, subjecting this emulsion to a shear process at a shear power of 1.times.10.sup.3 to 1.times.10.sup.8 Watts per cm.sup.3, wherein the water-in-oil emulsion is converted into an oil-in-water emulsion.

Process for preparing stable, finely divided polymer dispersions

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Bergisch Gladbach, Germany

Bernd Klinksiek