Bayer Aktiengesellschaft

Hans Hoffmann

Bruno Hees

Matjaz Florjancic

Stauros Smernos

Karin Ruess

Horst Richter

Otto Thaidigsmann

An improved method comprises electrophoretic application of enamel to a sheet steel substrate by a two layer/single stoving wherein a first or base enamel layer is applied to the sheet steel and a second white or colored enamel layer is applied to the first layer and the first layer has the following properties:

Process for electrophoretic white and colored enamelling

A process for the electrophoretic application of self-cleaning enamel systems free form aluminium on sheet steel by the two layered/single stoving process, comprising applying a base layer in a thickness of 80 to 120 .mu.m to a steel substrate, and then applying a top coat to said base coat, said top comprising an enamel suspension having a specific conductivity adjusted to a value below 2000 .mu.S.cm.sup.-1.

Process for the electrophoretic formation of selfcleaning enamel free

An article of manufacture useful as the base for an electronic circuit board is a substrate with an enamel layer having a heterogeneous structure containing at least two different phases obtained by applying a homogeneous, alkali-containing enamel powder to the substrate followed by heating at 850.degree. C. to 1,000.degree. C. wherein the enamel power has the composition as follows:

Growing community of inventors

Leichlingen, Germany

Hans Hoffmann