Electrocoating compositions and methods therefor

Details Electrocoating compositions and methods therefor Electrocoating compositions and methods therefor

1995-02-21

1996-09-17

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Electrophoresis or electro-osmosis processes and electrolyte...

204500, 204501, 204507, 523415, C25D 1300

Patent

active

055565182

ABSTRACT:
A method for forming a coating on an electrically conductive surface is discloses. The method comprises the steps of immersing the surface in a bath comprising an electrodepositable mixture of an intrinsically insulative polymer and an organic acid salt of an intrinsically conductive polymer, applying a voltage between an electrode and the surface in the bath to deposit a polymeric coating of the mixture on the surface, and curing the polymeric coating. The polymeric coating can be made electrically conductive by the additional step of immersing the polymeric coating in an organic acid after the deposition and before curing. A multilayered coating can be provided after curing the electrically conductive polymeric coating, by depositing a second or subsequent coating of an electrodepositable organic resin from an aqueous bath containing the resin on application of a voltage between an electrode and the electrically conductive polymeric subcoating in the bath. Also disclosed are resin compositions suitable for cationic electrodeposition.

REFERENCES:
patent: 4614775 (1986-09-01), Bekooij et al.
patent: 5128396 (1992-07-01), O'Neil et al.
patent: 5233000 (1993-08-01), Yodice

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