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Post Info TOPIC: Method of inhibiting algae growth on asphalt shingles

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Method of inhibiting algae growth on asphalt shingles

Sankar B. Narayan et al
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Abstract | Drawing | Description | Claims

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.

Patent number: 5356664
Filing date: Jun 11, 1993
Issue date: Oct 18, 1994
Inventors: Sankar B. Narayan, William T. Fay, Billy L. George, Christine A. Sobon, Mark H. Kayser
Assignee: Minnesota Mining and Manufacturing Company


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