Method for hardening powder coatings
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United States of America Patent
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Mar 11, 2003
Grant Date -
N/A
app pub date -
Jul 20, 2001
filing date -
Nov 13, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Process for curing powder lacquers by coating substrates with the powder lacquers and irradiating by radiation in the near infrared range (NIR radiation), which is characterized in that the curing times and/or the surface temperatures, obtainable by means of the radiation during certain curing times, of the substrates coated with the powder lacquers are controlled by setting the barium sulfate and/or aluminium oxide content of the powder lacquers to 1 to 50 wt. % and/or setting the carbon black content of the powder lacquers to 0.1 to 5 wt. %, the percentages by weight relating to the entire powder lacquer composition in each case.
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