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US 2022/0018134 A1Published application
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.
Claims10
1-11. (canceled)
A roofing granule comprising:
- (a) a granule;
- and
- (b) a coating on the granule, the coating comprising:
- (i) at least one silicon-containing oligomer or silicon-containing polymer, and
- (ii) an acrylic resin having a glass transition temperature of −18° C. to 60° C.,
- wherein the coating is substantially free of water, and
- wherein, when the coated roofing granule is applied to an asphalt shingle, the coated roofing granule exhibits reduced staining as compared to a roofing granule that is treated with petroleum oil.
4 more elements
An asphalt roofing shingle comprising:
- (a) an asphalt shingle;
- (b) roofing granules applied to the asphalt shingle;
- wherein the roofing granules are coated with a coating comprising:
- (i) at least one silicon-containing oligomer or silicon-containing polymer, and
- (ii) an acrylic resin having a glass transition temperature of −18° C. to 60° C.,
- wherein the coating is substantially free of water, and
- wherein the roofing granules exhibit reduced staining as compared to roofing granules that are treated with petroleum oil.
4 more elements
Dependencies are inferred from the claim text.