COMPOSITE NANOPARTICLES FOR ROOFING GRANULES, ROOFING SHINGLES CONTAINING SUCH GRANULES, AND PROCESS FOR PRODUCING SAME
First Claim
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1. A process for preparing roofing granules, the process comprising;
- (a) providing granule cores;
(b) providing a coating material;
(c) coating the granule cores with the coating material to form a coating layer having an exterior surface;
(d) including composite nanoparticles in the coating layer; and
(e) curing the coating layer.
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Abstract
Roofing granules are prepared by coating granule cores with a coating material including composite nanoparticles and curing the coating layer to dissolve the aggregate binder and disperse the nanoparticles in the coating.
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Citations
40 Claims
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1. A process for preparing roofing granules, the process comprising;
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(a) providing granule cores; (b) providing a coating material; (c) coating the granule cores with the coating material to form a coating layer having an exterior surface; (d) including composite nanoparticles in the coating layer; and (e) curing the coating layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 36)
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18. Roofing granules comprising;
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(a) a granule core having an exterior surface; (b) a coating layer covering the exterior surface of the granule core, and; (c) nanoparticles dispersed in the coating material.
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19-35. -35. (canceled)
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37. A process of coating a surface with nanoparticles, comprising the steps of;
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a) providing a nanoparticle aggregate comprising nanoparticles in a matrix; b) providing a coating having a binder; c) mixing the nanoparticle aggregate with the coating binder; d) dissolving the matrix in the coating binder to form a nanoparticle dispersion; e) applying the nanoparticle dispersion to the surface; and
,f) curing the coating binder. - View Dependent Claims (38, 39)
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40. A roofing granule comprising a copper based nanoparticle.
Specification