Method and apparatus for spraying waterborne coatings under vary

Details Method and apparatus for spraying waterborne coatings under vary Method and apparatus for spraying waterborne coatings under vary

1993-04-08

1999-06-29

Beck, Shrive

Coating processes

Measuring, testing, or indicating

427421, 427426, 118326, 118663, 118666, B05D 102, B05D 134

Patent

active

059166258

ABSTRACT:
The detrimental effects of fluctuating humidity are neutralized by adjusting the viscosity of a waterborne coating as it is being conducted to the spraying device. A predetermined amount of water or other viscosity modifying additive is mixed continuously with the coating in the coating supply line immediately upstream from the spray device. The amount of water or other additive to be added may be determined by monitoring the humidity in the spray zone. Preferably, an automated feedback control system is employed to adjust the amount of water or other viscosity altering additive being mixed into the coating stream.

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W. Burckhardt and H. J. Luthardt, "Water-borne industrial thermosetting systems: Physical chemical behaviour of their components and aspects of application technology", J. Oil Col. Chem. Assoc., 1979, 62, pp. 375-385.

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