Henkel Kommanditgesellschaft Auf Aktien

Henkel Ag & Company, Kgaa

Henry Rossmaier

Rainer Eskuchen

Helmut Blum

Willi Wuest

Manfred Biermann

Karlheinz Hill

Guenter Hellmann

Nils Bongartz

Jerzy-Tadeusz Wawrzyniak

Josef Wollmann

Dalija Ehmann

Hans-Juergen Riebe

Klaus Wollmann

Walter Winkle

Karl-Heinz Ott

Andreas Bruns

Josef Steber

The present invention relates to a method for the corrosion-protective and cleaning pretreatment of metallic components, produced at least partially from metallic materials from the elements iron, zinc and/or aluminum, with the use of an acid aqueous composition containing, in addition to the water-soluble compounds of the elements Zr and/or Ti causing the conversion of the metal surface, a mixture of an aliphatic diol and an aliphatic saturated polyhydroxy compound. It also comprises a chrome(VI)-free aqueous composition based on the constituents mentioned above which delivers outstanding results in cleaning and simultaneous corrosion-protective conversion of technical metal surfaces in one method step.

Method for corrosion-protective and cleaning pretreatment of metallic components

Corrosion protective cleaning agent for tin-plated steel

Composition and process for preventing corrosion and reducing friction

The aliphatic primary alcohols are reacted with a glycose, more especially glucose, in the presence of an acidic catalyst in certain process steps so that particularly light-colored and alkali-stable alkyl glucosides are obtained after a subsequent, compulsory bleaching step, which represents an improvement over known direct synthesis processes. The process may be carried out both on a laboratory scale and also on an industrial production scale.

Process for the direct production of alkyl glycosides

Derivative of aminosuccinic acid as a complexing agent

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Duesseldorf, Germany

Henry Rossmaier