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AssigneeHerberts GmbH
InventorsGabriele Buttner, Norbert David, Klausjorg Klein
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1 Process for producing a catalyst paste for cathodically separable electrophoretic dipping lacquers. 2.1 Use was made of dibutyltin oxide by way of a catalyst paste for electrophoretic dipping lacquers, dispersed in pasting binders. An object is to provide a new process for producing such catalyst pastes while saving time and energy. 2.2 A process is provided for producing a catalyst paste for cathodically separable electrophoretic dipping lacquers, wherein the dibutyltin oxide is first pre-dispersed with an organic solvent and an organic acid such as is commonly used for neutralizing cathodically separable electrophoretic dipping lacquers, whereupon it is dispersed with the pasting binder and water and ground. 2.3 Cathodic electrophoretic dip lacquering making use of catalyst pastes containing dibutyltin oxide.
A process for the production of a catalyst paste for cathodically separable electrophoretic dipping lacquers based on dibutyltin oxide by grinding dibutyltin oxide with a pasting binder in the presence of deionised water, characterised in that the dibutyltin oxide is, prior to grinding, pre-dispersed with an organic solvent and an organic acid as commonly used for neutralising cathodically separable electrophoretic dipping lacquers and optionally a wetting agent, at a water content of up to 5 wt. % based on the sum of dibutyltin oxide, solvent, acid and water, as well as optionally a wetting agent, and is then dispersed and ground together with the pasting binder and the water.
Dependencies are inferred from the claim text.