SOLAR HEAT-REFLECTIVE ROOFING GRANULES, SOLAR HEAT-REFLECTIVE SHINGLES AND PROCESS FOR PRODUCING THE SAME
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Issued Date -
Sep 4, 2014
app pub date -
Apr 8, 2014
filing date -
Sep 22, 2009
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Abstract
A process for preparing roofing granules includes forming kaolin clay into green granules and sintering the green granules at a temperature of at least 900 degrees Celsius to cure the green granules until the crystalline content of the sintered granules is at least ten percent as determined by x-ray diffraction.
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