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US 2019/0169848 A1Published application
Asphaltic membrane with mullite-containing granules
AssigneeFirestone Building Products Company, LLC
InventorWensheng ZHOU
Life of this patent
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Abstract
A roofing article comprising (i) an asphaltic substrate; and (ii) a plurality of mullite-containing granules disposed on a surface of the substrate, where said mullite-containing granules include a mullite concentration of at least 35 wt % and at most 63 wt % as determined by quantitative x-ray diffraction.
Claims18
1-20. (canceled)
A method of making a reflective roofing article, the method comprising the steps of:
- a. providing a hot asphaltic substrate;
- and
- b. applying by gravity a plurality of granules to the hot asphaltic substrate, wherein the plurality of granules are mullite-containing granules that include mullite crystallites dispersed within a non-mullite phase.
A reflective roofing article, said roofing article comprising:
- (i) an asphaltic substrate;
- and
- (ii) a plurality of granules disposed on a surface of the substrate, where said granules are mullite-containing granules that include mullite crystallites dispersed within a non-mullite phase, the granules including a mullite concentration of at least 35 wt % and at most 63 wt % as determined by x-ray diffraction.
A reflective roofing article comprising:
- (i) an asphaltic substrate;
- and
- (ii) a plurality of granules disposed on a surface of the substrate, where said granules are mullite-containing granules that include mullite crystallites dispersed within a non-mullite phase, said granules characterized by a grain size of about 0.05 μm.
Dependencies are inferred from the claim text.