Roofing granules comprising sintered base particles
AssigneeCertainTeed Corporation
InventorsMing-Liang Shiao, Jennifer A. Millberg, Tihana Fuss-Dezelic
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Abstract
A roofing product can include roofing granules, wherein the roofing granules include base particles and a coating covering the base particles. The base particles are sintered. The coating has a depth of penetration into an outside surface of at least about 0.5% of an average radius of the base particles. In an embodiment, the coating has a depth of penetration into an outside surface of at least about 2.5 microns into the base particles. Further included is a process of forming the roofing granules.
Claims20
A process of forming roofing granules comprising:
- providing sintered base particles, wherein the sintered base particles have a surface morphology that is porous;
- and
- forming a coating along an outside diameter of the base particles, wherein the coating has a depth of penetration into an outside surface of at least about 0.5% of an average radius of the base particles.
A process of forming roofing granules comprising:
- providing sintered base particles, wherein the sintered base particles have a surface morphology that is porous;
- and
- forming a coating along an outside diameter of the base particles, wherein the coating has a depth of penetration into an outside surface of at least about 2.5 microns into the base particles.
Dependencies are inferred from the claim text.