REDUCTION OR ELIMINATION OF FLIM DEFECTS DUE TO HYDROGEN EVOLUTION DURING CATHODIC ELECTRODEPOSITION

THIS INVENTION IS DIRECTED TO A METHOD FOR ELIMINATING OR REDUCING PINHOLE DEFECTS IN CATAPHORETICALLY DEPOSITED FILMS WITHOUT INTERFERING WITH THE ELECTROLYSIS OF WATER NEEDED FOR ELECTRODEPOSITION. THE METHOD COMPRISES DECREASING THE EVOLUTION OF HYDROGEN GAS AT THE CATHODE BY ADDING, TO THE ELECT...

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Bibliographische Detailangaben
1. Verfasser:	WINKLE, MARK ROBERT
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G APPARATUS THEREFOR CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON CORRECTING FLUIDS DYES ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FILLING PASTES GENERAL PROCESSES OF COMPOUNDING INKS MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES PRINTED CIRCUITS PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS USE OF MATERIALS THEREFOR WOODSTAINS WORKING-UP
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Zusammenfassung:	THIS INVENTION IS DIRECTED TO A METHOD FOR ELIMINATING OR REDUCING PINHOLE DEFECTS IN CATAPHORETICALLY DEPOSITED FILMS WITHOUT INTERFERING WITH THE ELECTROLYSIS OF WATER NEEDED FOR ELECTRODEPOSITION. THE METHOD COMPRISES DECREASING THE EVOLUTION OF HYDROGEN GAS AT THE CATHODE BY ADDING, TO THE ELECTRODEPOSITABLE COMPOSITONS, A COMPOUND WHICH IS REDUCED BY THE HYDROGEN PRODUCED AT THE HYDROGEN PRODUCED AT THE CATHODE DURING THE ELECTRODEPOSITION. THE HYDROGEN REACTS WITH THIS NON-GASEOUS COMPOUND RATHER THAN BECOMING HYDROGEN GAS AND FORMING BUBBLES WHICH LEAD TO PINHOLE DEFECTS.