Method for the spray application of polymeric-containing liquid coating compositions using subcritical compressed fluids under choked flow spraying conditions

Method for the spray application of polymeric-containing liquid coating compositions using subcritical compressed fluids under choked flow spraying conditions

Processes are disclosed for the use of subcritical compressed fluids, such as carbon dioxide or ethane, to reduce viscosity and to enhance atomization when spray applying coating compositions containing low molecular weight polymers to substrates, by using spray conditions that produce choked flow i...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: NIELSEN KENNETH ANDREW
Format: Patent
Sprache:eng
Schlagworte:
APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
PERFORMING OPERATIONS
PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL
SPRAYING OR ATOMISING IN GENERAL
TRANSPORTING
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Beschreibung
Zusammenfassung:Processes are disclosed for the use of subcritical compressed fluids, such as carbon dioxide or ethane, to reduce viscosity and to enhance atomization when spray applying coating compositions containing low molecular weight polymers to substrates, by using spray conditions that produce choked flow in the liquid mixture being sprayed, wherein the subcritical compressed fluid is a gas at standard conditions of 0° C. temperature and one atmosphere pressure and is miscible with the coating composition.