Abstract: Sodium Aluminate when used to adjust pH of paint detackifying systems improves the efficiency of polymeric paint detackifiers used in the detackification of paint from paint spray booths and similar equipment.

Abstract: Oversprayed paint in a paint spray operation is detackified by dosing the water of the waste water system of such operation with a composition comprising an amphoteric polymer and aluminum salts. The amphoteric polymer contains at least about 10 mole percent of cationic mer units of monoethylenically unsaturated monomer and at least 1 mole percent of anionic mer units. The aluminum salt preferred is aluminum sulfate, or its hydrates, for example alum. The amphoteric polymers preferably contain DMAEM, DMAEM.multidot.H.sub.2 SO.sub.4, DMAEM.multidot.MCQ, or mixtures thereof, with acrylic acid, methacrylic acid, AMPS, or mixtures thereof. The amphoteric polymers may also contain neutral monomers such as (meth)acrylamide.

Abstract: Oversprayed paint in a paint spray operation is detackified by dosing the water of the waste water system of such operation with a composition comprising a polymer and aluminum sulfate. The polymer contains at least about 10 mole percent of cationic mer units of monoethylenically unsaturated monomer.

Abstract: Water-dispersible polymeric latexes are excellent paint detackifying agents for treating the circulating water in paint spray booths when latexes have an average particle size less than 10 microns.

Abstract: Inorganic oxides, particularly silica and alumina, are excellent paint detackifying agents for treating the circulating water in paint spray booths when those oxides have a dry average particle size less than 10 microns.

Abstract: Water soluble low molecular weight cationic polymeric coagulants in combination with colloidal silica are excellent paint detackification agents for treating paint spray booth waters which are contaminated with paint particles.

Abstract: Both waterborne and solvent enamels can be sprayed in a common paint spray booth and be detackified by a composition comprising a blend of a melamine-formaldehyde polymer, polyvinyl alcohol and a styrene acrylate copolymer. The invention also contemplates the use of these compositions in detackifying paint in paint spray booths.

Abstract: Water soluble low molecular weight cationic polymeric coagulants in combination with colloidal silica are excellent paint detackification agents for treating paint spray booth waters which are contaminated with paint particles.

Abstract: A paint spray booth detackifying composition which includes mixtures of styrene-acrylate polymer and a melamine-formaldehyde polymer and the method of using same.

Abstract: A paint spray booth detackifying composition which includes mixtures of; melamine-formaldehyde polymers and polyvinyl alcohol polymers; and mixtures of melamine-formaldahyde polymer, polyvinyl alcohol polymer and styrene-acrylate polymer.

Abstract: A paint spray booth detackifying composition which includes mixtures of styrene-acrylate polymer and a melamine-formaldehyde polymer and the method of using same.

Abstract: Compositions useful for coagulating finely divided solids in turbid waters are prepared by mixing or blending together inorganic water soluble compounds such as aluminum chloride, aluminum sulfate, ferric chloride or ferric sulfate and water soluble organic positively charged polymeric coagulants having an average molecular weight of at least 2000 which is polydiallyl dimethylammonium chloride polymer. The compositions are especially useful for treating low turbidity waters, for example, waters having a turbidity of 20 NTU (nephelometric turbidity units).