Patent ID: 6575721
Filing Date: 2003-06-10
Classification: B01J,B05D,B29B,B29C,B29K,C09D,Y02P,Y10S

Abstract:
A system for producing a powder coating, said system comprising:a continuous extruder wherein powder coating raw materials including at least one resin and at least one additional powder coating ingredient are fed and processed to disperse the at least one additional ingredient with the at least one resin to form an extruded coating precursor stream; a source of a process media material which achieves a fluid condition within the processing system, the process media fluid being effective to reduce the viscosity of the powder coating precursor stream to allow processing of the powder coating precursor stream at a lower temperature, wherein said source of process media material comprises a source of fluid selected from the group consisting of supercritical fluids and liquefied gases; means for adding such process media material to at least one of the following: a.) the raw materials fed into the continuous extruder; b.) the raw materials processed in the continuous extruder; and c.) the extruded product of the continuous extruder, and means for forming and separating the powder coating from the process media material.