Coating processes – Solid particles or fibers applied – Roofing produced
Patent
1993-06-11
1994-10-18
Owens, Terry J.
Coating processes
Solid particles or fibers applied
Roofing produced
427214, 427219, 428404, 106 1836, B05D 700
Patent
active
053566645
ABSTRACT:
A method of inhibiting algae growth on an asphalt shingle surface exposed to varying humidity using a blend of copper-containing algae-resistant granules and non-algae-resistant granules. The copper-containing algae-resistant granules comprise a substrate granule having at least one inner ceramic coating layer comprising cuprous oxide and a seal coating having a thickness covering the inner layer and which is at time t.sub.o devoid of copper.
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Fay William T.
George Billy L.
Kayser Mark H.
Narayan Sankar B.
Sobon Christine A.
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Owens Terry J.
Wendt Jeffrey L.
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