Back to results
US 2016/0107929 A1Published application
Coating compositions for roofing granules, dark colored roofing granules with increased solar heat reflectance, solar heat-reflective shingles and process for producing the same
AssigneeCertainTeed Corporation
InventorsHusnu M. Kalkanoglu, Thomas McShea, Ming Liang Shiao
Life of this patent
Estimating the term…
Abstract
Dark colored roofing granules include an inert base particle coated with a composition including a metal silicate, a non-clay latent heat reactant, and a dark colored but solar reflective pigment.
Claims20
A method of making roofing granules, the method comprising:
- (a) providing inert base particles;
- (b) coating the inert base particles with a coating composition to form at least one coating layer on the inert base particles, the coating composition comprising:
- a metal silicate coating binder comprising an alkali metal silicate and at least one non-clay latent heat reactant;
- and
- at least one solar reflective pigment;
- the at least one solar reflective pigment being selected to provide roofing granules having an L* less than 30 and solar reflectance of at least 20 percent;
- (c) curing the coating composition at an elevated temperature less than the glass sintering temperature of silica.
4 more elements
A coated substrate comprising:
- a substrate having a surface;
- a cured coating on the surface, the cured coating comprising
- a reaction product of a coating composition, the coating composition comprising
- a metal silicate;
- at least one non-clay latent heat reactant;
- and
- at least one solar reflective pigment.
4 more elements
A coating composition comprising:
- a metal silicate;
- at least one non-clay latent heat reactant;
- and
- at least one solar reflective pigment.
1 more element
Dependencies are inferred from the claim text.