E.i. Dupont De Nemours and Company

Herberts Gesellschaft MIT Beschrankter Haftung

Herberts Gmbh

Klaus-Peter Doebler

Walter Schubert

Klausjorg Klein

Klausjoerg Klein

Volker Duecoffre

Matthias Kimpel

Wolfgang Goldner

Frank Lieverz

Stephan Brenke

Klaus Tannert

A process for coating three-dimensional, electrically conductive substrates by applying a coating layer of a stoving coating composition substantially only to the exterior surfaces of the substrates at a layer thickness sufficient to electrically insulate such surfaces, stoving the coating layer and then coating the interior surfaces with an electrodeposition coating composition, wherein the stoving coating composition is characterised by a volume resistivity from 10 to 10 Ohm&middot;cm of applied and stoved coating layers of said composition.

Process for coating three-dimensional electrically conductive substrates

Aqueous coating compositions using polyalkylene glycol dialkyl ethers

A process is described for producing multilayer coatings in which a first coating layer of a first aqueous coating medium is applied to an electrically conducting substrate by electrophoretic deposition, is provided wet-in-wet with a second coating layer of a second aqueous coating medium, followed by joint stoving, wherein a coating medium based on one or more vehicles stabilised by ionic groups and which crosslink on stoving with the formation of urethane groups is used for the second coating layer, and the coating media are selected so that the maximum pigment/vehicle weight ratio of the first coating medium is 1:1, that the ratio of the pigment/vehicle weight ratio of the first coating medium to that of the second coating medium is up to 1.8, and the minimum stoving temperature interval of the second coating layer is above that of the first coating layer or overlaps the latter so that the lower limit of the interval for the second coating layer is above the lower limit of the interval for the first coating layer.

Process for the production of multilayer coatings

Growing community of inventors

Radevormwald, Germany

Klaus-Peter Doebler