Patent ID: 8962690
Filing Date: 2015-02-24
Classification: A01N

Abstract:
1. A synergistic biocidal composition for controlling microorganisms in an aqueous or water-containing system, the composition comprising: 2,2-dibromomalonamide and a surface active biocide selected from the group consisting of C 12 -C 16 alkyl dimethyl benzyl ammonium chloride, dioctyl dimethyl ammonium chloride, polyhexamethylene biguanide, dodecylguanidine hydrochloride, and didecyldimethyl ammonium chloride: wherein when the surface active biocide is alkyl dimethyl benzyl ammonium chloride the weight ratio of 2,2-dibromomalonamide to alkyl dimethyl benzyl ammonium chloride is from 32:1 to 4:1 wherein when the surface active biocide is dioctyl dimethyl ammonium chloride the weight ratio of 2,2-dibromomalonamide to dioctyl dimethyl ammonium chloride is from 9:1 to 1:3; wherein when the surface active biocide is polyhexamethylene biguanide the weight ratio of 2,2-dibromomalonamide to polyhexamethylene biguanide is from 32:1 to 2:1; wherein when the surface active biocide is dodecylguanidine hydrochloride the weight ratio of 2,2-dibromomalonamide to dodecylguanidine hydrochloride is from 1:1 to 1:16; and wherein when the surface active biocide is didecyldimethyl ammonium chloride the weight ratio of 2,2-dibromomalonamide to didecyldimethyl ammonium chloride is from 4:1 to 1:16.