Protracted release microbiocidal article for aqueous systems
US4505889A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 23, 1982 |
| Grant date | Mar 19, 1985 |
| Priority date | — |
| Expiry date | Sep 23, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01N43/80
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.