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The selection of pigmentation is also critical
to achieving maximum temperature resistance.
Coatings with short-term exposures (< 1,000 hours) at
temperatures up to 350°C or long-term exposure (>
1000 hours) up to 225°C can be produced with
titanium dioxide and mica. Applications with shortterm
exposures at temperatures up to 525°C or longterm
exposure up to 250°C often include black iron
oxide. Aluminum, zinc and stainless steel are utilized
in high-temperature applications (short term 650°C,
long term 350°C). The high thermal conductivity of
these metals transfers heat away from the coated
substrate. In addition, as the resin oxidizes, the metal
particles will fuse with the resin to form a ceramic
coating with stable metalo-siloxane bonds. Further
enhancements to the thermal stability of the coating
can be achieved by increasing the loading of
reinforcing fillers such as mica or Wolastonite.
butanolized polyphenyl siloxane for improved adhesion
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