Patent ID: 6589607
Filing Date: 2003-07-08
Classification: B05D

Abstract:
A method of making a coated article, comprising the steps of:electrostatically applying a thermoset powder coating onto at least one major surface of a continuously moving substrate thereby providing a thermoset coated substrate; moving the thermoset coated substrate into a first oven and heating the thermoset powder coating to a first temperature in the first oven sufficient to melt the thermoset powder and to effect cross-linking conversion of the thermoset powder at a first rate which permits degassing, and thereafter removing the coated substrate from the first oven; ceasing the application of additional heating of the thermoset powder for a predetermined period sufficient to permit the thermoset powder to degas; moving the thermoset coated substrate into a second oven, and heating the thermoset coating to a second temperature in the second oven sufficient to effect cross-linking conversion of the thermoset powder coating at a second rate that is faster than the first rate to achieve curing, wherein the second temperature is higher than the first temperature; and moving the substrate with cured thermoset coating thereon from the second oven to a quenching area for quenching.