Process for production of powder paints

Abstract

In an extrusion process for making powder paints from a series of batch blend units comprising resinous binders and pigmentary solids, interbatch contamination can be suppressed by using a same first portable (hopper) vessel for transporting, temporarily storing, and feeding extruder feed from like particular batch blend units and using a same second portable (hopper) vessel for collecting, transporting, and temporarily storing comminuted extrudates corresponding to said like particular batch blend units and feeding such comminuted extrudates into packages, especially when said first portable vessel is used for part or all of the blending operation. Like extrudates, corresponding to particular batch blend units, can be substantially completely hardened by cooling prior to their comminuting, and collected in, transported to, and temporarily stored for final comminution in a same third portable (hopper) vessel. Alternatively, such particular extrudates can be comminuted before they are substantially completely hardened, then completely hardened subsequently by cooling.

Dependencies are inferred from the claim text.