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US 9,392,789 B2Granted
Compositions of dibromomalonamide and their use as biocides
AssigneeDow Global Technologies LLC
InventorsFreddie L. Singleton, Bei Yin, Janardhanan S. Rajan
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Abstract
The application describes synergistic microbicidal compositions comprising: 2,2-dibromomalonamide and an oxidizing biocide selected from the group consisting of: monochloramine, bromochlorodimethylhydantoin, hypobromite ion or hypobromous acid, hydrogen peroxide, dichloroisocyanurate, trichloroisocyanurate and chlorine dioxide and a method for controlling microorganism growth in an aqueous or water-containing system.
Claims4
A synergistic biocidal composition comprising:
- synergistically effective amounts of 2,2-dibromomalonamide and an oxidizing biocide selected from the group consisting of monochloramine, bromochlorodimethylhydantoin, hypobromite ion or hypobromous acid, hydrogen peroxide, dichloroisocyanurate, trichloroisocyanurate, and chlorine dioxide;
- wherein when the oxidizing biocide is monochloramine, the weight ratio of 2,2-dibromomalonamide to monochloramine is between 32:1 and 1:4;
- wherein when the oxidizing biocide is bromochlorodimethylhydantoin the weight ratio of the 2,2dibromomalonamide to the bromochlorodimethylhydantoin is between 4:1 and 1:16;
- wherein when the oxidizing biocide is hypobromite ion or hypobromous acid the weight ratio of the 2,2dibromomalonamide to the hypobromite ion or hypobromous acid is between 4:1 and 1:32;
- wherein when the oxidizing biocide is hydrogen peroxide the weight ratio of the 2,2-dibromomalonamide to the hydrogen peroxide is between 1:20 and 1:80;
- wherein when the oxidizing biocide is dichloroisocyanurate the weight ratio of the 2,2-dibromomalonamide to the dichloroisocyanurate is between 32:1 and 1:1;
- wherein when the oxidizing biocide is trichloroisocyanurate the weight ratio of the 2,2-dibromomalonamide to trichloroisocyanurate is between 16:1 and 1:4;
- wherein when the oxidizing biocide is chlorine dioxide the weight ratio of the 2,2-dibromomalonamide to the chlorine dioxide is between 16:1 and 1:16.
5 more elements
Dependencies are inferred from the claim text.