Method for environmentally benign paint spraying using a dispers

Details Method for environmentally benign paint spraying using a dispers Method for environmentally benign paint spraying using a dispers

1991-09-24

1994-03-08

Beck, Shrive

Coating processes

Measuring, testing, or indicating

427345, 427421, 118326, 210639, 210650, B05D 102, B01D 6114

Patent

active

052925471

ABSTRACT:
A method is provided for environmentally benign paint spraying with a dispersion of oven-curable lacquer in water in a paint spraying station having a cubicle with water-rinsed rear wall for collecting and washing out of overspray in cubicle waste water. The entire cubicle waste water is separated by ultrafiltration into permeate and lacquer-containing residue, the permeate being returned to the paint spraying station, the lacquer-containing residue being enriched with lacquer by removing water until its lacquer content is essentially equal to that of dispersion that is freshly fed to the spray painting station. The residue that is enriched with lacquer is admixed to the freshly fed dispersion for reuse in spray painting. A constituent for preventing coalescence of the lacquer is admixed to the dispersion fed to the paint spraying station, wherein a constituent for the inhibition of the drying is admixed to the dispersion that is fed to the paint spraying station, a constituent for adjusting the throughput for ultrafiltration is admixed to the cubicle waste water, and the conductibility of the water returned to the paint spraying station is monitored and kept below the limit.

REFERENCES:
patent: 4455332 (1984-06-01), Gunther
patent: 4564464 (1986-01-01), Harpel et al.
patent: 4607592 (1986-08-01), Richter
Rompps Chemie-Lexikon, p. 231, 1979 (no month available).
Ullmanns Encyclopadie der Technischen Chemie, 4th ed., vol. 15, pp. 658-660, 1978 (no month available).
Research Disclosure, Nr 128, Dec. 1974, Havant, GB, p. 4 AKZO Chemie BV: "Stabilisation of Printing Inks and Coatings Containing Chlorinated Acetophenones as Photo-Initiators" Nr 12806.

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