Abstract: A composition and method for treating oversprayed paints in paint spray booths is provided. The method includes contacting the paint overspray with a wash water system comprising an agitated solution including a coagulant so as to collect the paint overspray in the agitated solution. The solution containing the paint overspray is passed to an area relatively free of agitation so as to cause the solution to spontaneously phase separate into an organic phase containing paint overspray and an aqueous phase. The organic phase containing the paint overspray, which contains the paint solids portion, that includes organic resins and, optionally, pigments, and, optionally, an organic solvents portion, is separated from the aqueous phase. The wash water system for treating paint overspray in paint spray booths includes a coagulant in an amount effective in precipitating the paint solids and, optionally, organic solvents, from the system.

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: A method and an apparatus for dispersing or dissolving a pelletized material in a liquid, in which a pelletized material is placed on a platform in a container having a lower chamber portion, and a stream of liquid is introduced into that lower chamber to produce a vortex of the liquid which washes across the pelletized material, thereby causing it to become dispersed or dissolved into the liquid.

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: 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.