Bayer Aktiengesellschaft

Dieter Schleenstein

Bernd Klinksiek

Wieland Hovestadt

Christian Rasp

Georg Ronge

Oswald Wilmes

Michael Vom Felde

Klaus Nachtkamp

Manfred Bock

Lothar Kahl

Nusret Yuva

Heinrich Steude

Jurgen Dahmer

Wilfried Litz

Stephan Kabelac

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

Inert, thermally stable high-boiling solvents which have a defined boiling point or which boil over a narrow range are used as heat exchange media during thermal cracking of carbamic acid esters (urethane cracking).

Heat exchange media for the thermal cracking of carbamic acid esters

This present invention relates to a process for thermally cracking carbamic acid esters into the corresponding isocyanate and hydroxyl compounds in the liquid phase, wherein the reaction proceeds as a reactive rectification in the stripping zone of a column and in an inert, high-boiling solvent, which acts as a buffer to keep the reaction away from the evaporator region of the column.

Process for thermally cracking carbamic acid esters

A method is described for the preparation of aqueous coating compositions based on resin binders containing isocyanate-reactive hydrogen atoms and polyisocyanates, by mixing the components with water, wherein the mixture is forced at a pressure of from 1 to 30 MPa through a nozzle of small size in at least one dimension.

Aqueous two-component polyurethane coating compositions and a method for

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Odenthal, Germany

Dieter Schleenstein