Coating powders comprising macrocyclic oligomers
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United States of America Patent
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Jul 2, 2002
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N/A
app pub date -
Sep 28, 2000
filing date -
Dec 20, 1999
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Abstract
A coating powder comprising a macrocyclic oligomer and a ring-opening polymerization agent is applied to an article, fused, and converted to a linear polymer at a temperature of from about 160 to about 400.degree. C. The powder has the low melt viscosity and friability of a thermoset powder but is converted at high fusing temperatures to a tough coating having the good impact resistance and good elongation of a thermoplastic powder. The oligomer is a polyester, polycarbonate, polyamide, polyimide, polyamideimide. The article may be coated electrostatically or in a fluidized bed.
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