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US 2021/0285220 A1Published application
Post-Functionalized Roofing Granules and Process for Preparing Same
AssigneeCertainTeed Corporation
InventorsKeith C. Hong, Gregory F. Jacobs, Van Nhan Nguyen
Life of this patent
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Abstract
Roofing granules having a color coating layer are covered with a clear, transparent or translucent outer coating composition including a functional material, such nanoparticles of anatase titanium dioxide.
Claims20
A process for preparing functionalized roofing granules, the process comprising:
- (a) providing base roofing granules having a first coating layer, the first coating layer including at least one coloring material;
- (b) coating the base roofing granules with a clear, transparent or translucent outer coating composition, the outer coating composition comprising an outer coating binder and at least one functional material;
- and
- (c) curing the outer coating composition to form a transparent or translucent outer coating layer on the base roofing granules.
1 more element
A process for preparing functionalized roofing granules, the process comprising:
- (a) providing base roofing granules having a first coating layer, the first coating layer including at least one coloring material;
- (b) coating the base roofing granules with a second coating composition to form a second coating layer over the first coating layer;
- (c) curing the second coating composition having a second coating layer on the base roofing granules to form intermediate granules;
- (d) coating the intermediate granules with a transparent or translucent outer coating composition, the outer coating composition comprising an outer coating binder and at least one functional material;
- and
- (e) curing the outer coating composition to form a transparent or translucent outer coating layer on the base roofing granules.
3 more elements
Functionalized roofing granules comprising:
- (a) base roofing granules having a first coating layer, the first coating layer including at least one coloring material;
- and
- (b) a clear, transparent or translucent outer coating layer comprising an outer coating binder and at least one functional material.
Dependencies are inferred from the claim text.