Gm Global Technolgoy Operations, Inc.

Chemfil Corporation

William B Brown

Harry R Charles

Dean L Miles

Edmund L Tisko

A method for the removal and recovery of paint overspray in a water wash spray booth is disclosed. The method uses a circulating agitated dispersion of an organic solvent component in water which collects the paint overspray. The dispersion containing the overspray is permitted to phase separate into an organic phase and an aqueous phase. The organic phase is further treated such as by distillation to separate the paint solids from an organic solvent portion which contains the original organic solvent component and the organic solvents associated with the paint. The organic solvent portion can be recycled and reused in the circulating dispersion and the paint solids can be recovered for further use such as a filler for adhesives or can be disposed of.

Method for removing and recovering paint overspray in a water wash spray

In accordance with a preferred embodiment of this invention, a decorative and protective coating is electrodeposited on a negatively charged metallic substrate from an acidic aqueous dispersion. The dispersed particles contain a film forming addition polymer, copolymer or mixtures thereof. This addition polymerization reaction product has occasional but randomly distributed pendent aminimide and pendent hydroxyl functionalities. The hydroxyl and the aminimide functionalities are present in about equal amounts. Once deposited, the coating is cured at a temperature of about 120.degree. C. or above.

Growing community of inventors

Birmingham, MI, United States of America

William B Brown