CHEMICAL TREATMENT OF OVERSPRAY PAINT

Treatment of waterborne and solventborne overspray paints was investigated using three different chemical treatments categorized as melamine-, aluminum-, and silica-based. Detackification was found to be extremely important for the treatment of solventborne paints in the presence or absence of waterborne paints. While both melamine- and aluminum-based treatments successfully detackified various paints, the silica-based treatment failed to result in acceptable detackification levels for solventborne paints. Results showed that the flocculation and dewatering of waterborne paints did not occur readily due to high dispersibility and water compatibility of the paints. The presence of waterborne paints did not adversely affect the treatment of various types of solventborne paints.