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US 2020/0290888 A1Published application
Photocatalytic Roofing Granules, Photocatalytic Roofing Products, and Process for Preparing Same
OwnerKeith C. Hong, Gregory F. Jacobsinventors
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Abstract
Photocatalytic roofing granules include a binder and inert mineral particles, with photocatalytic particles dispersed in the binder.
Claims21
1-30. (canceled)
Photocatalytic roofing granules comprising:
- (a) a binder that is a chemically-bonded phosphate cement;
- (b) inert mineral particles;
- and
- (c) photocatalytic particles;
- the inert mineral particles and the photocatalytic particles being dispersed in the binder.
2 more elements
Photocatalytic roofing granules according to claim 18, wherein the at least one phosphate is selected from salts including at least one cation selected from the group consisting of ammonium, calcium, sodium, potassium, and aluminum cations.
Photocatalytic roofing granules, each comprising:
- a base particle having an outside surface;
- and
- disposed on the outside surface of the base particle, a coating of photocatalytic particles dispersed in a binder that is a chemically-bonded phosphate cement.
Dependencies are inferred from the claim text.