Patent ID: 6241382
Filing Date: 2001-06-05
Classification: C09D,Y02P

Abstract:
Process for producing powder coating materials comprising lustre pigment, characterized in that(A) the starting materials, consisting of the customary powder coating components and one or more lustre pigments, are first of all introduced into the filling chamber of a first vessel (1) which has a mixing element (3) and is provided if desired with a thermostat (4), subsequently a supercritical fluid is admitted to the filling chamber, and finally the starting materials are mixed in the presence of the supercritical fluidand(B) the mixture of the customary powder coating components and one or more lustre pigments and the supercritical fluid is transferred by a distributor (6) into a second vessel (2), the distributor having a plurality of nozzles with an aperture diameter of from 0.025 cm to 2.5 cm, and in the course of transfer the second vessel is maintained at an internal pressure of from 0 bar to 350 bar and at a temperature of from -85.degree. C. to 200.degree. C.