Method for purging paint circuits and waterborne purge cleaner
AssigneeChemetall GmbH
InventorsJose M. Casamor, Miguel Angel Jaen Franco, Jordi Girbau
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Abstract
Described herein is a method for purging paint circuits coated with a non-cured paint with improved cleaning efficiency and a reduced COD (Chemical Oxygen Demand) in the wastewater, where a paint circuit is brought into contact with a waterborne purge cleaner solution including at least one glycolether and which additionally includes at least one water-soluble amine having at least 7 carbon atoms. Also described herein is a waterborne purge cleaner solution with improved cleaning efficiency and reduced VOC (Volatile Organic Compound) content as well as a concentrate for producing the purge cleaner solution.
Claims15
A method for purging a paint circuit coated with a non-cured paint, comprising bringing the paint circuit into contact with a waterborne purge cleaner solution comprising at least one glycolether characterized in that it additionally comprises at least one water-soluble amine having 7 to 15 carbon atoms, wherein the waterborne purge cleaner solution does not comprise any organic solvents other than the at least one glycolether and does not comprise any surfactants.
Dependencies are inferred from the claim text.