Method for producing a multilayer coating and the use thereof

Details Method for producing a multilayer coating and the use thereof Method for producing a multilayer coating and the use thereof

2006-08-08

2006-08-08

Mayekar, Kishor (Department: 1753)

Chemistry: electrical and wave energy

Processes and products

Electrophoresis or electro-osmosis processes and electrolyte...

C204S505000

Reexamination Certificate

active

07087146

ABSTRACT:
A process for producing a multicoat system on a substrate, in which a) an electrodeposition coating film is deposited on the substrate, b) the electrodeposition coating film is predried by heating to a predrying temperature for a predetermined period, c) a coat of a surfacer is applied to the electrodeposition coating film, and d) the electrodeposition coating film and the coat of the surfacer are baked together at elevated temperatures, and in which the predrying temperature in step b) is equal to the temperature (Tp) or lies above the temperature (Tp) at which the loss factor tan δ, which is the quotient formed from the loss modulus E″ and the storage modulus E′, of the unbaked electrodeposition coating material shows a maximum, and the use of the resulting multicoat system.

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T. Dirking, K.H., entitled “Rheological characterization of electrodeposition coating materials during the baking procedure”: correlation of viscosity values with edge protection results, atipec XXIII, 1996, Brussels, Belgium, pp. B-260 to B-261.
English Language Abstract for DE 44 09 715.
Frey, K.H. et al., entitled “Cure Monitoring of Thermoset Coatings” Progress in Organic Coatings 27 (1996) pp. 59-66.

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