Article and method of electrodeposition of aqueous dispersions with finely-divided, non-ionic plastics

Claim 1

An article having an electrically conducting substrate and a stoved coating adhered thereto which stoved coating comprises a film baked at tempertures between 160° and 200° C., said film prepared from an aqueous solution and/or aqueous dispersion, said solution and/or dispersion being the electrodeposition bath in which said film is cathodically deposited on said substrate being connected as a cathode in the electrodeposition bath, said aqueous solution and/or dispersion comprising a reaction product protonated with acids, from the reaction of (a) Mannich bases which are free from epoxide groups with (b) epoxide resins wherein aliphatic hydroxyl groups originating from (a), (b) or a mixture thereof are at least partially converted into urethane groups by reaction with partially blocked isocyanate, said Mannich bases (a) formed from components selected from: (a 1 ) condensed phenols which are free from ether groups and contain at least two aromatic rings and at least two phenolic hydroxyl groups; (a 2 ) condensed phenols which contain ether groups and contain at least two aromatic rings and at least two phenolic hydroxyl groups; (a 5 ) formaldehyde or compounds which split off formaldehyde; and (a 3 ) secondary amines having at least one hydroxyalkyl group or a mixture of a 3 and (a 4 ) secondary dialkylamines or dialkoxyalkylamines which do not contain free hydroxyl groups or from the components (a 1 ) or (a 2 ) with (a 5 ) and (a 3 ) or a mixture of (a 3 ) and (a 4 ), the improvement which comprises said dispersion having a pH between 7 and 9 and having dispersed therein finely divided, non-ionic plastics selected from the group consisting of epoxide resins, polyester resins, acrylate resins, polyurethane resins, polyamide resins, polyethylene, polypropylene, cellulose acetobutyrates and mixtures thereof.