PROCESSO PARA O REVESTIMENTO DE SUBSTRATOS CONDUTORES ELETTRICOS,SUBSTRATOS REVESTIDOS DE ACORDO COM ESTE PROCESSO E BANHOS DE LAQUEAMENTO DE ELETRO-IMERSAO QAUOSOS

• Main Authors: UDO REITER, GUENTHER OTT, DAVID J. SANTURE, DIETER RUEHL, WALTER JOUCK
• Format: Patent
• Language: Portuguese
• Published: 09.10.1990
• Edition: 5
• Subjects: ADHESIVES; APPARATUS THEREFOR; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CORRECTING FLUIDS; DYES; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS THEREFOR; WOODSTAINS

The invention concerns a cathodic electrophoretic enamelling process using electrophoretic enamelling baths containing a cationic amine-modified epoxide resin obtained by conversion of: (A) a diepoxide compound having an epoxy equivalent weight less than 2000 (B) a compound which reacts monofunctionally with epoxide groups and contains an alcoholic OH group, a phenolic OH group or an SH group, (C) an amine. The molar ratio of components (A) and (B) is between 10:1 and 1:1, preferably between 4:1 and 1.5:1, and the positive charges are introduced by protonation and/or use of amine salts as components (C). The electrophoretic enamelling baths are characterized in that they contain at least 7.5 wt. % of a polyoxyalkylene polyamine, the percentage by weight being expressed with respect to the total binder content in the electrophoretic enamelling bath.