Sequestered metal biocides using ionic polymeric stabilizing agents
AssigneeBio-Lab, Inc.
InventorJohn P. Garris
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Abstract
Metal-containing biocides for treating swimming pool water, spas, cooling towers, or other industrial applications without staining are disclosed. The biocidal compositions include a source of metal and a polymeric sequestering agent. The polymeric sequestering agent may be a water-soluble anionic or cationic polymer. Conventional sequestering agents may also be included in the composition.
Claims22
A method of reducing the ability of a copper-, silver-, and/or zinc-containing biocide to stain pool surfaces, said method comprising providing the copper-, silver-, and/or zinc-containing biocide to a pool in conjunction with a water-soluble anionic or cationic polymeric sequestering agent effective to sequester at least some of the copper, silver, and/or zinc;
- wherein the copper, silver, and/or zinc provided by the biocide is present in the pool water in an amount ranging from 0.025 ppm to 0.7 ppm, and the ratio of anionic or cationic polymeric sequestering agent to copper, silver, and/or zinc in the pool water is between 0.7:1 and 4.7:1.
A method of extending the useful life of a copper-, silver-, and/or zinc-containing biocide, comprising providing the copper-, silver-, and/or zinc-containing biocide to a pool in conjunction with a water-soluble anionic or cationic polymeric sequestering agent effective to sequester at least some of the copper, silver, and/or zinc;
- wherein said copper, silver, and/or zinc is present in the pool water in an amount ranging from 0.025 ppm to 0.7 ppm, and the ratio of “anionic or cationic polymeric sequestering agent” to “copper, silver, and/or zinc” in the pool water is between 0.7:1 and 4.7:1.
Dependencies are inferred from the claim text.