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ROOFING GRANULES WITH IMPROVED LUSTER, ROOFING PRODUCTS INCLUDING SUCH GRANULES, AND PROCESS FOR PREPARING SAME

  • US 20110200823A1
  • Filed: 04/27/2011
  • Published: 08/18/2011
  • Est. Priority Date: 08/20/2009
  • Status: Active Grant
First Claim
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1. A process for producing roofing granules having a cured coating layer, the process comprising:

  • (a) providing base particles;

    (b) providing a coating composition comprising an inorganic sol material and at least one organic colorant, the at least one organic colorant being selected to provide a cured coating layer having an L* of less than 20;

    (c) applying the coating composition to the base particles to form a coating layer on the base particles; and

    (d) curing the coating layer at a temperature less than 200 degrees Celsius.

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