Henkel Ag & Company, Kgaa

Ulrich Dawidowski

Nicole Auweiler

Klaus Lepa

The present invention relates to an aqueous autodeposition composition comprising iron(II) ions, fluoride ions, at least one chain transfer agent and at least one dispersed organic binder component, wherein the organic binder component comprises at least one water-dispersible polymerizable (meth)acrylic acid component; and at least one acrylated mono- or diphosphate ester component.

Single layer autodepositable coating formulation

The present invention relates to a method for reducing the ionic strength or the concentration of certain polyvalent ions in aqueous dispersions of organic binding agents or inorganic solid bodies by electrodialysis, and a cell package suitable for use in the method. This method permits stabilization of aqueous compositions of the dispersed components by regulating the ionic strength or the concentration of certain polyvalent ions thereby increasing the durability and throughput times of coating baths. More particularly, the method is used in removing polyvalent metal cations from anionically stabilized aqueous binding agent dispersions. A special application exists in removing from autophoretic baths, which contain anionically dispersed organic binding agents and possibly inorganic pigments for forming protective layers on metallic components, polyvalent cations of zinc, iron and aluminum, which accumulate in the bath when components with surfaces comprised at least partially from zinc, iron and/or aluminum, are processed.

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Wildberg, Germany

Ulrich Dawidowski