Copper base antifouling paints with pH control
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsVincent J. Castelli, Eugene C. Fischer
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Abstract
Conventional Copper based antifouling paints are improved by adding from 01 to 20.0 weight percent based on the weight of the Cuprous ion source of an additive compound which (A) will give a positive acid test to litmus paper in distilled water; (B) is at least slightly soluble in sea water; and (C) does not react quickly with cuprous ions in sea water to produce precipitates.
Claims12
In a copper base antifouling paint containing a film-forming vehicle and a cuprous source as the toxic agent, the improvement comprising 0.001 to 20 weight percent of (NH.sub.4).sub.2 SO.sub.4 based upon the weight of the cuprous source.
Dependencies are inferred from the claim text.