| 摘要 |
There is disclosed as an article a water-permeable membrane containing sealed therein a solid particulate microbiocidal composition which is useful in aqueous systems, wherein the composition is produced from a microbiocidal compound having relatively low water solubility or a combination thereof with other microbiocidal compounds having relatively high water solubility to give a combination generally characterized by low water solubility in admixture with an inert, finely-divided water-insoluble solid carrier material. Especially useful are microbiocidal 3-isothiazolones and 2-substituted-1,2-benzisothiazolones having relatively low water solubility, and metal salt stabilized derivatives thereof, admixed with silicaceous diatomaceous earth. These articles afford protracted controlled release of active ingredient and also afford a safer form of the active ingredient heretofore known to be relatively irritating to the skin of man when at high concentration in aqueous solution.
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