Herberts Gesellschaft MIT Beschrankter Haftung

Albrecht Luttenberg

Hans-Peter Patzschke

Werner Lenhard

Wolfgang Goldner

Hans-Jurgen Schlinsog

Wolfgang Bogdan

A process for preparing a multi-layer coating on an electrically nonconductive surface of a substrate, which comprises

Method for producing multilayer coatings

Aqueous, heat-curable coating material, containing as vehicle 85 to 40 weight percent of a mixture of a fatty acid-free, acidic epoxide resin phosphate ester with an acid number of 10 to 150, prepared from an epoxide group-containing polyglycidyl ether and/or a polyglycidyl methacrylate resin with more than 1.3 epoxide groups per molecule and an epoxide equivalent weight of 180 to 5,000 and a phenolic resin-modified, carboxyl group-containing, oil-free polyester with an acid number of 15 to 175 and an OH number of 15 to 175, 0 to 25 weight percent of an epoxide resin graft copolymer with an acid number of 30 to 200, prepared from an epoxide group-free reaction product of fatty acid-free polyglycidyl ethers with more than 1.3 epoxide groups per molecule and an epoxide equivalent weight of 1,000 to 5,000 with .alpha.,.beta.-unsaturated monocarboxylic acids and 5 to 40 weight percent of a fully etherified amineformaldehyde condensation resin and/or a fully etherified phenol-formaldehyde condensation resin with at least 2 reactive sites per molecule; its use for coating substrates, as well as methods for coating objects with these coating materials and objects coated therewith.

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Wuppertal, Germany

Albrecht Luttenberg