COATING FORMULATION FOR THE INTERIOR SURFACES OF CANS

The invention relates to a water-based can interior coating comprising a copolymer or a copolymer mixture at least of an aliphatic and acyclic alkene having at least one a,ß-unsaturated carbonic acid in water-dispersed form, wherein the acid count of the copolymer or the copolymer mixture is at leas...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	PODWOISKI, PATRICK, SCHNEIDER, WOLFGANG, STRUCK, BERND, KUNZ, ANDREAS, ENDRES, HOLGER
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES FILLING PASTES INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	The invention relates to a water-based can interior coating comprising a copolymer or a copolymer mixture at least of an aliphatic and acyclic alkene having at least one a,ß-unsaturated carbonic acid in water-dispersed form, wherein the acid count of the copolymer or the copolymer mixture is at least 20 mg KOH / g, but not more than 200 mg KOH / g, and at least one water-dispersed or water-soluble hardener selected from the group of aminoplasts and/or the group of carbodiimides. Can interior coatings according to the invention are characterized in that, as a hardened film, said coatings have exceptional properties with respect to hardness, abrasion resistance and resistance to hot liquids due to the good cross linking of the copolymer or the copolymer mixture with the hardener on the interior surfaces of metallic cans. The invention offers an alternative to the conventional use of epoxides based on bisphenols in can interior coatings.