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US 12,624,550 B2Granted
Coated roofing granules, roofing materials made therefrom and methods of preparing coated roofing granules
AssigneeSpecialty Granules Investments LLC
InventorsDavid D. Kragten, Daniel E. Rardon
Life of this patent
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Abstract
This invention relates to coated roofing granules, roofing materials made therefrom, and methods of preparing such coated roofing granules. By coating roofing granules with an aqueous coating that includes water, a silicon-containing oligomer or polymer, and an acrylic resin, coated roofing granules can be prepared that exhibit reduced staining as compared to traditional roofing granules that are treated with petroleum oil.
Claims27
A coated roofing granule comprising:
- (a) a roofing granule;
- and
- (b) a post-treatment coating on the roofing granule, the post-treatment coating comprising:
- (i) at least one silicon-containing oligomer or silicon-containing polymer that is present in an amount of 0.01 to 5 pounds per ton of roofing granule;
- and
- (ii) an acrylic resin that is present in an amount of 0.1 to 5 pounds per ton of roofing granules,
- wherein the coating is substantially free of water.
4 more elements
A roofing material comprising:
- (a) a substrate;
- (b) coated roofing granules applied to the substrate;
- wherein the coated roofing granules comprise roofing granules coated with a post-treatment coating comprising:
- (i) at least one silicon-containing oligomer or silicon-containing polymer that is present in an amount of 0.01 to 5 pounds per ton of roofing granule, and
- (ii) an acrylic resin that is present in an amount of 0.1 to 5 pounds per ton of roofing granules,
- wherein the coating is substantially free of water.
3 more elements
Dependencies are inferred from the claim text.