Continuous processing of powder coating compositions
OwnerAndrew T. Daly, Owen H. Decker +4inventors
InventorsAndrew T. Daly, Owen H. Decker, Karl R. Wursthorn, Frank R. Houda, Leo T. Grundowski, Carl W. Ernst
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Abstract
Systems, apparatus combinations and methods for producing a coating powder are provided wherein a stream of a powder coating precursor including at least one resin and at least one additional powder coating ingredient is contacted with a process fluid effective to reduce the viscosity of the powder coating precursor to allow processing of the powder coating precursor at a lower temperature.
Claims2
A powder coating composition comprising at least one resin selected from the group consisting of polyamides, cellulose esters, polypropylene, poly(vinyl chloride), poly(vinylidene fluoride), silicones, epoxys, polyesters, and hydroxy functional polyesters, wherein the at least one resin has been processed in a continuous extruder to form a friable foamed extrudate, wherein 96% of a volume of the powder coating composition has a particle size of up to and including 20 microns.
Dependencies are inferred from the claim text.