AQUEOUS COATING COMPOSITION FOR ELECTRODEPOSITION CONTAINING AMINE EPOXIDE REACTIN PRODUCT

According to this invention we provide an aqueous coating composition, suitable for application to a cathodic substrate by electrodeposition, which comprises a dispersion in an aqueous medium in the presence of an amine-ionizing acid of cationically stabilized particles comprising: (1) 50 to 84% by...

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Bibliographische Detailangaben
1. Verfasser:	REDMAN, R P
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES APPARATUS THEREFOR CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON 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
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Beschreibung
Zusammenfassung:	According to this invention we provide an aqueous coating composition, suitable for application to a cathodic substrate by electrodeposition, which comprises a dispersion in an aqueous medium in the presence of an amine-ionizing acid of cationically stabilized particles comprising: (1) 50 to 84% by weight on the combined weight of (1), (2) & (3) of an amine-epoxide reaction product. (2) 15 to 45% by weight based on the combined weight of (1), (2) & (3) of a blocked polyisocyanate as crosslinking agent; and (3) 1 to 12% by weight based on the combined weights of (1), (2) and (3) of a highly methylolated, highly alkylated melamine-formaldehyde resin, wherein on average at least 4.0 of the reactive hydrogen atoms per triazine ring are methylolated, at least 3.5 of these methylol groups are alkylated and the alkylating group is selected from C4-10 alkyl; the resin being substantially unreactive with the amine-epoxide-reaction product (1) at temperatures below 190 DEG C.