Patent ID: 7981937
Filing Date: 2011-07-19
Classification: A01N,A61K

Abstract:
1. A physically and chemically stable, saline dispersion of 2,2-dibromo-3-nitrilopropionamide (DBNPA) particles present in a concentration in the range from about 20 parts to 50 parts by weight of DBNPA per 100 parts of dispersion, in a restrictedly viscosified liquid brine solution having a viscosity in the range from about 340 cP (Brookfield #2 spindle, 30 rpm) to 30,000 cP (Brookfield #4 spindle, 6 rpm) at 25° C.; the brine having dissolved therein a halide selected from the group consisting of an alkali metal halide, an alkaline earth metal halide, and a combination of one with another, in an amount at least 20% by weight of the amount required to saturate 100 parts of water; the brine solution being viscosified with at least one viscosifier unreactive with the DBNPA; the viscosifier being present in a concentration in the range from about 0.3% but less than 1% by weight of the dispersion, insufficient to gel the dispersion, physical stability of which dispersion, at the concentration of viscosifier, decreases as concentration of DBNPA at the concentration increases; wherein less than 3% by weight of DBNPA in a 20% DBNPA dispersion is hydrolyzed upon being stored in a closed container for 3 weeks at a temperature in the range from about −5° C. to 35° C., and less than 3% by weight of DBNPA in the dispersion settles as solid particles in the container upon being stored during the same period and under the same conditions.