| 摘要 |
There is indicated a method for the production of qualitatively improved biocidal or biostatic compositions which comprise water and/or a polar organic solvent and contain at least one 3-isothiazolinone of the general formula <IMAGE> in which Y, R and R' have the meanings indicated, the 3-isothiazolinone being produced in known manner and then stabilized by the addition of a nitrate. The method is characterized by the fact that the mixture obtained upon the production of the 3-isothiazolinone is subjected to an additional stabilization after the addition of the nitrate in the manner that it is stored at a pH of 0.2 to 1.5 and a temperature of at most 40 DEG C. for a period of at least 48 hours and then again brought to a higher pH. The compositions produced in this manner have an improved appearance and increased storage stability.
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