Patent ID: 7919170
Filing Date: 2011-04-05
Classification: C04B,E04D,Y10T

Abstract:
1. A non-white roofing shingle granule comprising: a substrate comprising a granule; a first reflective coating comprising titanium dioxide and at least 50 vol % of an inorganic binder, on an outer surface of the substrate forming a coated substrate, the coated substrate exhibiting a minimum direct solar reflectance value of at least 25%; and a second reflective coating on the first reflective coating forming a non-white roofing shingle granule, the second reflective coating comprising a colored pigment having enhanced NIR reflectivity, the second reflective coating having a non-metallic appearance; wherein, the combination of the first reflective coating and the second reflective coating provide the non-white roofing shingle granule with a reflectivity of at least about 20% at substantially all points in the wavelength range between 770 and 2500 nm, and the non-white roofing shingle granule has a color as defined on a CIE L*a*b* scale wherein a* and b* are selected such that −(L*)+[((L