Compositions of dibromomalonamide and their use as biocides

Abstract

A biocidal composition comprising 2,2-dibromomalonamide and an oxidizing biocide, and its use for the control of microorganisms in aqueous and water-containing systems.

What is claimed is: 
     
         1 . A synergistic biocidal composition comprising: 2,2-dibromomalonamide and at least one oxidizing biocide selected from the group consisting of hypochlorous acid or a salt thereof, monohalodimethylhydantoin, dichlorodimethylhydantoin, and dibromodimethylhydantoin wherein the weight ratio of 2,2-dibromomalonamide to the oxidizing biocide is between 16:1 and 1:8. 
     
     
         2 . A composition according to  claim 1  wherein the oxidizing biocide comprises a monohalodimethylhydantoin and the weight ratio of the 2,2-dibromomalonamide to the monohalodimethylhydantoin is between 1:1 and 1:4. 
     
     
         3 . A composition according to  claim 1  wherein the oxidizing comprises dichlorodimethylhydantoin and the weight ratio of the 2,2-dibromomalonamide to the dichlorodimethylhydantoin is between 16:1 and 1:2. 
     
     
         4 . A composition according to  claim 1  wherein the oxidizing biocide comprises dibromodimethylhydantoin and the weight ratio of the 2,2-dibromomalonamide to the dibromodimethylhydantoin is between 16:1 and 1:8. 
     
     
         5 . A composition according to  claim 1  which is: paint, coating, aqueous emulsion, latex, adhesive, ink, pigment dispersion, household or industrial cleaner, detergent, dish detergent, mineral slurry polymer emulsion, caulk, adhesive, tape joint compound, disinfectant, sanitizer, metalworking fluid, construction product, personal care product, textile fluid, spin finish, industrial process water, oil and gas field injection water, produced water, oil and gas functional fluid, drilling mud, fracturing fluid, fluid in oil and gas field transportation pipeline, fuel, air washer, wastewater, ballast water, filtration systems, swimming pool or spa water. 
     
     
         6 . A method for controlling microorganism growth in an aqueous or water-containing system, the method comprising treating the aqueous or water-containing system with an effective amount of a composition according to  claim 1 . 
     
     
         7 . A method according to  claim 6  wherein the aqueous or water-containing system is paint, coating, aqueous emulsion, latex, adhesive, ink, pigment dispersion, household or industrial cleaner, detergent, dish detergent, mineral slurry polymer emulsion, caulk, adhesive, tape joint compound, disinfectant, sanitizer, metalworking fluid, construction product, personal care product, textile fluid, spin finish, industrial process water, oil and gas field injection water, produced water, oil and gas functional fluid, drilling mud, fracturing fluid, fluid in oil and gas field transportation pipleline, fuel, air washer, wastewater, ballast water, filtration system, swimming pool or spa water.