BIOCIDAL ROOFING GRANULES, ROOFING PRODUCTS INCLUDING SUCH GRANULES, AND PROCESS FOR PREPARING SAME
First Claim
Patent Images
1. Biocidal roofing granules comprising:
- a mineral core; and
an exterior coating covering the mineral core; and
at least one biocidal photocatalytic metal oxide;
the exterior coating including at least one porous layer having a network of pores formed therein; and
the porous inorganic layer containing the at least one biocidal photocatalytic metal oxide in the network of pores.
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Abstract
Biocidal roofing granules include a mineral core covered with an outer layer of mesoporous silica including photocatalytic nanoparticles of anatase titanium dioxide as a biocide and an optional organic biocide.
107 Citations
59 Claims
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1. Biocidal roofing granules comprising:
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a mineral core; and
an exterior coating covering the mineral core; and
at least one biocidal photocatalytic metal oxide;
the exterior coating including at least one porous layer having a network of pores formed therein; and
the porous inorganic layer containing the at least one biocidal photocatalytic metal oxide in the network of pores. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 28, 29, 30)
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13. A process for preparing biocidal roofing granules, the process comprising:
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(a) providing a mineral core;
(b) preparing a gel-forming inorganic coating medium;
(c) providing at least one biocidal photocatalytic metal oxide;
(d) coating the mineral core with the inorganic sol;
(e) forming a porous coating layer on the mineral core from the inorganic sol, the porous coating layer having a pore network; and
(f) disposing the at least one photocatalytic metal oxide in the pore network. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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31. A roofing product including a biocidal coating, the roofing product comprising:
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a base material; and
an exterior coating covering the base material;
the exterior coating including at least one porous layer having a network of pores formed therein;
the porous inorganic layer containing at least one biocidal photocatalytic metal oxide in the network. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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44. A process for preparing roofing materials, the process comprising:
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(a) providing a base material;
(b) preparing a gel-forming inorganic coating medium;
(c) providing at least one biocidal photocatalytic metal oxide;
(d) coating the base material with the inorganic coating medium;
(e) forming a porous coating layer on the mineral core from the inorganic coating medium, the porous coating layer having a pore network; and
(f) disposing the at least one photocatalytic metal oxide in the pore network. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59)
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Specification