Wacker-chemie Gmbh

Wacker Chemie Ag

Consortium Fur Elektrochemische Industrie Gmbh

Johann Doppelberger

Mario Heinemann

Herbert Barthel

Torsten Gottschalk-Gaudig

Johann Bindl

Silvia Jung

Stephan Loskot

Ute Voelkel

Hans P Scherm

Walter Goeblmeier

Ute Völkel

Aqueous dispersions contain at least two chemically different particle types having a diameter on average of less than 100 &#x3bc;m. The dispersions are resistant to sedimentation and gelling for long periods of time, and can be used for many purposes, such as the polishing of optical surfaces, and in paints and adhesives.

Dispersion which contains at least 2 types of particles

The invention relates to interference pigments comprising molecules fixed in a cholesteric configuration, and to the use thereof. The pigments of the invention have a plateletlike structure and a thick ness of from 1 .mu.m to 20 .mu.m. They contain oriented, crosslinked substances with a liquid-crystalline structure having a chiral phase.

Interference pigments comprising molecules fixed in a cholesteric

The invention relates to a process for preparing highly dispersed metal oxides whose surfaces are modified by an ammonium-functional organopolysiloxane as a charge controlling substance for positive chargeable toners, in which the highly dispersed metal oxides are reacted with an organopolysiloxane which contains silicon-bonded terminal hydroxyl and/or alkoxy groups, diorganosiloxane units, in which the two organic radicals are monovalent hydrocarbon radicals, and siloxane units in which the organic radicals contain a positive charged nitrogen which is bonded to silicon via carbon.

Process for preparing highly dispersed metal oxides whose surfaces are

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Emmerting, Germany

Johann Doppelberger