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A coating powder consisting essentially of generally spherical, preferably cellular, particles ranging in size from less than 2 to 40 mu m, 75% of whose volume consist of particles of from 2 to 20 mu m in size, is provided by dissolving the components of the coating powder in a supercritical fluid w...

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Bibliographische Detailangaben
Hauptverfasser:	CORRELL, GLENN D, WURSTHORN, KARL R, SHAN, NAVIN B, DALY, ANDREW T
Format:	Patent
Sprache:	ger
Schlagworte:	ADHESIVES AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON CORRECTING FLUIDS DYES FILLING PASTES GENERAL PROCESSES OF COMPOUNDING INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS POLISHES PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SPRAYING OR ATOMISING IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING USE OF MATERIALS THEREFOR WOODSTAINS WORKING-UP
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Beschreibung
Zusammenfassung:	A coating powder consisting essentially of generally spherical, preferably cellular, particles ranging in size from less than 2 to 40 mu m, 75% of whose volume consist of particles of from 2 to 20 mu m in size, is provided by dissolving the components of the coating powder in a supercritical fluid without the aid of a surfactant and spraying the solution into a zone whose pressure is less than that of the fluid. A very smooth continuous film of a cured thermosettable coating powder is achieved even when the film thickness is less than 25.4 mu m (1 mil), e.g. from 5 mu m (about 0.2 mil) and greater. The advantages of powder coatings may now be realised fully in the automobile and can industries.