Process for the depositing of metal coatings containing...

Details Process for the depositing of metal coatings containing... Process for the depositing of metal coatings containing...

C - Chemistry, Metallurgy

25

D

204/24, 400/5124

C25D 15/00 (2006.01) C25D 9/02 (2006.01) C25D 15/02 (2006.01)

Patent

CA 1098073

ABSTRACT OF THE DISCLOSURE The present invention provides a process for applying to an object acting as a cathode a composite coating made up of a polyfluorocarbon resin and a metal in which process the resinous particles have an average particle size of less than about 10 µm and are kept suspended in a concentration of about 3 to 150 grams litre of bath solution in the presence of a cationic fluorocarbon surfactant and a nonionic surfactant, the nonionic surface active compound being a fluorocarbon compound, the molar ratio between the cationic surface active compound and the nonionic surface active fluorocarbon compound being between 25:1 and 1:3.5; and the total amount of surface active fluoro- carbon compounds being at least 3x10-3 mmoles per m2 of surface area of the polyfluorocarbon particles. The present invention also provides a metal plating bath, which contains an aqueous solution of a metal or metals to be electroplated, and a dispersion of fine fluorocarbon resin particles having an average size less than about 10 µm in a concentration of about 3 to 150 grams per litre of bath liquid, and a cationic and a nonionic surface active fluorocarbon compound, in a molar ratio between 25:1 and 1:3.5 and in an amount which is at least 3.10-3 mmoles per m2 of surface area of the polyfluorocarbon particles.

262584

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