Dual cure cathodic electrocoating composition

Details Dual cure cathodic electrocoating composition Dual cure cathodic electrocoating composition

1977-03-28

1978-01-03

Turer, Richard B.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

20415916, 20415918, 204181, 260 292EP, 260 292N, 260 292TN, 260 296H, 260 22CB, 260 775AM, 260836, 260837R, 260859R, 427 54, 428418, 428425, 428457, C08F 800

Patent

active

040665232

ABSTRACT:
An electrocoating composition containing a polymer having pendant tertiary amine groups, a polymer containing pendant mercaptan groups, a bis-maleimide cross-linking agent, and a photosensitizer can be electrodeposited onto a cathode substrate disposed within an aqueous electrocoating bath. The amine groups and the mercaptan groups are protonated with acid to render the polymers water dispersible prior to electrodeposition and are adapted to become deprotonated upon electrodeposition. Full cure of the electrodeposited coating on the cathode substrate is obtained by the combination of heat curing and ultraviolet radiation curing. In a specific embodiment of the present invention, a single polymer contains both the pendant tertiary amine groups and pendant mercaptan groups.

REFERENCES:
patent: 3959106 (1976-05-01), Bosso et al.
patent: 3975251 (1976-08-01), McGinniss
patent: 4037018 (1977-07-01), McGinniss
patent: 4039414 (1977-08-01), McGinniss

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