Degussa Aktiengesellschaft

Degussa - Huls Ag

Evonik Carbon Black Gmbh

Orion Engineered Carbons Gmbh

Johann Mathias

Alfons Karl

Gerd Tauber

Horst Kleinhenz

Werner Kalbitz

Andreas St&uuml;bbe

Manfred Ettlinger

Frank Stenger

Manfred Dannehl

Joachim Fröhlich

Heinz Zoch

Peter Kopietz

Volker Heinze

Guenter Stadtmueller

Jutta Zimmermann

Yves Gorat Stommel

Arkadi Maisels

Rudolf Scharffenberg-Kahlke

Thomas Riedemann

Karsten Aldenhövel

The invention relates to carbon aerogels with particle sizes less than 1 &#x3bc;m. The carbon aerogels are prepared by (A)reacting a mono- and/or polyhydroxybenzene, an aldehyde and a catalyst in a reactor at a reaction temperature T in the range from 75-200&#xb0; C. at a pressure of 80-2400 kPa, (B) then spraying the reaction mixture from process step (A) into an acid, (C) drying the resulting product from process step (B) and (D) carbonizing it. The carbon aerogels according to the invention can be used as filler, reinforcing filler, UV stabilizer, electrode material, sound absorbents, thermal insulating material, catalyst, catalyst support, conductivity additive, absorbent for gas and/or liquid preparation or pigment.

Carbon aerogels, process for their preparation and their use

Process for the production of furnace black by producing a stream of hot combustion gases in a combustion chamber, feeding the hot combustion gases along a flow axis from the combustion chamber through a reactor narrow point into a reaction zone, mixing carbon black raw material into the flow of the combustion gases in front of, inside or behind the reactor narrow point and stopping carbon black formation downstream in the reaction zone by spraying in water, steam being jetted in axially through the gas burner and optionally at the radial oil nozzles and beaded carbon black being introduced before and/or after the reactor narrow point.

Process for the production of furnace black

Aqueous carbon black dispersions contain carbon black and cationic and non-ionic surfactants in addition to water. The dispersions are produced by dispersing the carbon black and the other components in water with bead mills, ultrasonic mills or an Ultra Turrax mixer. The dispersions can be used to produce inks, lacquers and printing inks.

Aqueous carbon black dispersions

A pigment preparation, containing a pigment and/or carbon black and a polymer and/or a surfactant selected from the group of cross-linked polyoxyethyleneacrylic acid, fatty alcohol polyglycol ethers, polyvinylpyrrolidone, alcohol alkoxylates, lignin sulfonates, alkylphenol polyglycol ethers, naphthalene sulfonic acid derivatives or mixtures thereof which is prepared from an aqueous dispersion by freeze-drying. The pigment preparation can be used for coloring purposes and/or to provide antistatic characteristics in water-based coloring and lacquer systems, disperse dyes, printing inks, inking systems and coating systems.

Pigment preparations, a process for preparing pigment preparations and use thereof

Aqueous carbon black dispersions contain carbon black and cationic surfactants in addition to water. The aqueous carbon black dispersions are produced by dispersing the carbon black and other components in water with bead mills, ultrasonic mills or an Ultra Turrax mixer. The dispersions can be used to produce inks, lacquers and printing inks.

The utilization of ethoxylated polyethyleneamines for addition to aqueous dispersions of pyrogenically prepared silicon dioxide in order to obtain an increase of the thickening action thereof.

Method for increasing the thickening action of pyrogenically produced

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Kahl, Germany

Johann Mathias