Process of controlling organic coatings in aqueous spray booth systems

Claim 1

In a process for controlling the overspray of organic coatings in an aqueous spray booth system, the improvement which comprises the step of adding to the water supply of an aqueous spray booth system adapted to remove the overspray of organic coatings, an effective amount of a mixture of (1) a long carbon chain surface active nitrogen derivative containing one or more hydrocarbon chains of about C 8 to C 18 in length and (2) at least one member selected from the class consisting of (a) a polyvalent water soluble or dispersible metal salt of a metal selected from the class consisting of calcium, iron, zinc, barium, magnesium, strontium and aluminum, and (b) a nonionic or anionic high molecular weight polymer selected from the class consisting of homopolymers, copolymers or terpolymers of acrylic acid, acrylamide, acrylonitrile, polyhydroxy-alcohols, polyamines, polytetraethylenediamine, vegetable gums, polyisocyanates, polyglycidyl and aldehydes, or a blend of said polymers, whereby any organic coating over-sprayed into said water supply becomes removable therefrom as a non-sticky, non-tacky, readily handled sludge.