Powder coating for packaging containers
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United States of America Patent
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Jun 27, 2000
Grant Date -
N/A
app pub date -
Feb 28, 1997
filing date -
Mar 1, 1996
priority date (Note) -
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Abstract
The present invention relates to a powder coating for application to packaging containers, 1) the powder coating comprising A) at least one thermoplastic, B) if desired, at least one thermoset, preferably an epoxy resin having an epoxy equivalent weight of from 400 to 3000, C) if desired, pigments, fillers, catalysts, typical powder coating additives such as degassing agents, levelling agents, free-radical scavengers and antioxidants, and 2) the powder coating having a particle-size distribution such that a) at least 90 percent by mass of the powder-coating particles have a size of between 1 and 120 .mu.m, b) the maximum size of the powder-coating particles is .ltoreq.150 .mu.m for at least 99 percent by mass of the particles, and c) the mean size of the powder-coating particles in between 1 and 60 .mu.m, preferably from 1 to 30 .mu.m.
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