Cathodic electrocoating process

Details Cathodic electrocoating process Cathodic electrocoating process

1975-03-19

1976-08-17

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

C25D 1310, C25D 1306

Patent

active

039752518

ABSTRACT:
A heat-curable electrocoating composition containing a polymer having pendant amine groups and cross-linking agent having alpha-beta-ethylenically unsaturated carbonyl groups can be electrodeposited onto a cathode substrate disposed within an aqueous electrocoating bath. The amine groups of the polymer are protonated to render the polymer water-dispersible prior to electrodeposition. Upon electrodeposition onto the substrate, the amine groups become de-protonated and then cross-link with the alpha-beta-ethylenically unsaturated carbonyls upon heating to form a fully-cured electrodeposited coating on the cathode substrate.

REFERENCES:
patent: 3671476 (1972-06-01), Terai et al.
patent: 3709808 (1973-01-01), Hammond

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