Method for removing and reclaiming excess uncured paint from pai

Details Method for removing and reclaiming excess uncured paint from pai Method for removing and reclaiming excess uncured paint from pai

1994-04-04

1995-11-14

Silverberg, Sam

Cleaning and liquid contact with solids

Processes

Paints, varnishes, lacquers, or enamels, removal

134 10, 252153, 252162, 252170, 252171, 252173, 252364, 252542, 252544, 252DIG8, B08B 500

Patent

active

054663008

ABSTRACT:
Method for removing and reclaiming excess uncured paint from a paint spray booth includes entraining uncured over-sprayed paint particles in a stream of air passing through the paint spray booth. The entrained over-sprayed paint particles are then caused to come into contact with a flowing aqueous flood sheet within the paint spray booth such that a substantial portion of said paint particles are solubilized within the flowing aqueous flood sheet and thereby removed from the stream of air. The flowing flood sheet includes (i) between about 10 to 45 percent by weight of an N-methyl pyrrolidone, (ii) between about 15 to about 40 percent by weight of at least one alkyl glycol ether having 1 to 4 carbon atoms in its alkyl moiety; and (iii) about 0.1 to about 2.0 percent by weight of a non-ionic linear alcohol ethoxylate surfactant sufficient to reduce the flood sheet vapor pressure. The solubilized uncured paint particles are thereafter separated and collected from the aqueous flood sheet so as to thereby be reclaimed for future use.

REFERENCES:
patent: 4836950 (1989-06-01), Madsen et al.
patent: 5006279 (1991-04-01), Grobbel et al.
patent: 5015410 (1991-05-01), Sullivan
patent: 5024780 (1991-06-01), Leys
patent: 5035829 (1991-07-01), Suwala
patent: 5098450 (1992-03-01), Patzelt et al.
patent: 5124062 (1992-06-01), Stevens
patent: 5188675 (1993-02-01), Dormon-Brailsford
patent: 5334255 (1994-08-01), James et al.
McCutcheon's, Emulsifiers & Detergents, North American Edition, 1982, p. 202.

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