Process for applying coatings containing both a metal and a synt

Details Process for applying coatings containing both a metal and a synt Process for applying coatings containing both a metal and a synt

1977-03-22

1979-07-10

Tung, T.

Chemistry: electrical and wave energy

Processes and products

204 40, 204 41, 204 48, 204 49, 204 52R, 204 55R, C25D 302, C25D 510, C25D 550

Patent

active

041607074

ABSTRACT:
A process is provided for simultaneously coating an article with a metal and a synthetic resin. In this process, the article to be coated is made the cathode in an aqueous electroplating bath. The electroplating bath contains (1) a metal salt, (2) particles of a synthetic resin in a concentration of about 3 to about 250 grams per liter of bath, (3) a cationic surfactant and (4) a nonionic surfactant. The concentration of the resin particles in the bath is from about 3 to about 250 grams per liter and the particle size of the resin is less than about 10 micrometers. The cationic and nonionic surfactants are used in a ratio of between 100:1 and 2:1 and the concentration of the two surfactants in the bath is at least 4.times.10.sup.-3 mmoles per m.sup.2 of surface area of the particles. The bath is subjected to electrolysis until a coating of a metal and the resin forms on the surface of the article. A resinous coating is deposited over the layer of metal and resin. The process is applicable to resinous compounds which do not contain fluorocarbon groups. The surfactants are those which are of the non-fluorocarbon type.

REFERENCES:
patent: 3356467 (1967-12-01), Brown et al.
patent: 3672970 (1972-06-01), Tomaszewski
patent: 3687824 (1972-08-01), Brown et al.

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