POWDER COATING COMPOSITIONS CROSS-LINKED WITH NON CYANURATE POLYEPOXIDES
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United States of America Patent
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Issued Date -
Jan 5, 2012
app pub date -
Feb 12, 2008
filing date -
Sep 1, 2005
priority date (Note) -
Abandoned
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Abstract
The present invention relates to powder coating compositions and to components and ingredients for incorporation therein, suitable for fast curing schedule and with excellent resistance to outside aging. Non-isocyanurate polyepoxide cross-linking reagents can be used, provided the nature of the carboxylated polyester resin is formed of at least 30 mole % aromatic acid and the chain of the carboxyl terminated polyester also incorporates a moiety derived from 1,4 cyclohexanedicarboxylic acid. The powder coating composition can be cured for 90 seconds at a temperature of 250° C. or 55 seconds at 270° C. or 20 seconds in an induction oven at a temperature of 300° C. in the presence of a catalyst.
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