Two component powder coating system and method for coating a heat sensitive substrate therewith

摘要

[Wood] A heat sensitive substrate is [electrostatically] coated with a thermosetting powder coating system in which a mixture of a self-curing epoxy resin and a catalyst therefore is extruded and pulverized and a low temperature curing agent [are both] a pulverized and the powders are blended with conventional additives to make a coating powder which is deposited on [a wooden] the substrate and heated to cure. The mixture of resin and catalyst does not cure within the extruder but it is made to cure at low temperatures by the separate addition of the curing agent. A small amount of the low temperature curing agent, insufficient to cause substantial curing during extrusion may be used in place of the catalyst.