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US 10,246,879 B2Granted
Roofing granules with high solar reflectance, roofing products with high solar reflectance, and processes for producing same
AssigneeCertainTeed Corporation
InventorsMing Liang Shiao, Keith C. Hong, Walter T. Stephens
Life of this patent
Estimating the term…
Abstract
Solar reflective roofing granules include a binder and inert mineral particles, with solar reflective particles dispersed in the binder. An agglomeration process preferentially disposes the solar reflective particles at a desired depth within or beneath the surface of the granules.
Claims13
A process for preparing solar reflective roofing granules, the process comprising:
- (a) providing an inorganic binder and inert mineral particles to form a mixture;
- (b) forming the mixture into uncured granule bodies having an exterior surface;
- (c) adhering solar reflective particles only at or proximate to the exterior surface of the uncured granule bodies;
- and
- (d) firing the binder to provide the solar reflective roofing granules having the solar reflective particles only at or proximate to the exterior surfaces thereof.
2 more elements
A process for preparing solar reflective roofing granules, the process comprising:
- (a) providing an inorganic binder, ceramic particles and solar reflective particles;
- (b) dispersing the ceramic particles and the solar reflective particles in the inorganic binder to form a mixture;
- (c) forming the mixture into uncured granules, each uncured granule having a plurality of solar reflective particles homogeneously dispersed with a plurality of ceramic particles;
- and
- (d) firing the uncured granules to form cured roofing granules, each cured roofing granule including a plurality of the solar reflective particles at or proximate to an exterior surface thereof.
2 more elements
A process for preparing solar reflective roofing granules, the process comprising:
- (a) providing an inorganic binder and ceramic particles;
- (b) forming the ceramic particles and inorganic binder into uncured granule bodies having an exterior surface;
- (c) adhering solar reflective particles only at or proximate to the exterior surface of the uncured granule bodies;
- and
- (d) sintering the uncured granule bodies to form solar reflective roofing granules having the solar reflective particles only at or proximate to the exterior surfaces thereof.
2 more elements
Dependencies are inferred from the claim text.