A novel biocide composition.

Abstract

The present invention relates to a novel biocide tablet for use in gravity fed water purification devices and suitable for purifying water for drinking purposes and a process for preparing the novel biocide composition. Manufacturing tablets of smaller size using the combination of a halogenated. 5, 5dlalkyllhydantoin and chlorine biocide compound is a problem as the tablet strength gets affected and the tablets are very brittle and thus break very easily. The present inventors have found that it is possible to obtain tablets weighing 2-8g with good tablet strength, by selecting a specific range of particle size of the materials and using a water soluble boron containing compound .at selected range. The biocide tablet composition comprises one or more halogenated’5,5-dialkylhydantoin compound most commonly used compound is 1-bromo3-chloro-^, 5-dimethylhydantion (BCDMH), a chlorine biocide compound selected from trichloroisocyanuric acid (TCCA) or sodium dichloroisocyanurate (NaDCC) or mixtures thereof; 0.1-1.0% water soluble bdron'containign compound; wherein the rtio between the halogenated 5,5-dialkylylhydantoin compound and chlorine biocide compound is in the range 85:15 to 65:35 and the average particle size of he halogenaed 5,5-dialkylylhydantoin compound and chlorine biocide compound is in the range 400 to 1200 microns preferably 800-1000 microns.