Solar heat-reflective roofing granules, solar heat-reflective shingles, and process for producing same
First Claim
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1. Solar heat-reflective roofing granules comprising:
- (a) a base particle comprising an inert mineral;
(b) a first coating on the base particle, and(c) a second coating on the first coating, wherein the second coating comprises a plurality of infrared-reflective metal films.
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Abstract
Solar-reflective roofing granules having improved solar heat-resistance are formed by coating colored mineral particles with a coating composition including titanium dioxide nanoparticles.
130 Citations
7 Claims
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1. Solar heat-reflective roofing granules comprising:
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(a) a base particle comprising an inert mineral; (b) a first coating on the base particle, and (c) a second coating on the first coating, wherein the second coating comprises a plurality of infrared-reflective metal films. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification