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US 5,707,438 AGranted
Composite cuprous oxide powder
AssigneeAmerican Chemet Corporation
InventorJohn N. Carlton
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AssigneeAmerican Chemet Corporation
InventorJohn N. Carlton
Estimating the term…
A composite cuprous oxide powder is provided comprising at least about 80% by weight of cuprous oxide particles and substantially the balance cupric oxide adhering to cuprous oxide particles. The composite cuprous oxide powder is produced by surface oxidizing cuprous oxide particles to form a black coating or layer thereon. The composite powder is produced by subjecting particles of cuprous oxide to surface oxidation at a temperature ranging from about 400.degree. F. to less than about 900.degree. F. for a time period sufficient to surface oxidize the particles of cuprous oxide and produce a black coating thereon of cupric oxide. The method is applicable to the production of black pigment grade cuprous oxide powder.
A composite cuprous oxide powder comprising at least about 80% by weight of cuprous oxide particles and the balance cupric oxide adhering to said cuprous oxide particles thus forming a black coating or layer thereon.
An anti-fouling paint for providing an anti-fouling coating on a substrate for use in marine applications comprising a black cuprous oxide pigment dispersed in a liquid paint vehicle, the amount of pigment in said vehicle ranging from about 3% to 90% by weight, said black cuprous oxide pigment comprising surface-oxidized cuprous oxide particles containing at least about 80% by weight cuprous oxide and the balance cupric oxide as an oxidized coating on said particles of cuprous oxide.
Dependencies are inferred from the claim text.