Biocidal 3-isothiazolinone compositions

Details Biocidal 3-isothiazolinone compositions Biocidal 3-isothiazolinone compositions

1997-04-30

1999-10-26

Weddington, Kevin E.

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

Having -c-, wherein x is chalcogen, bonded directly to...

A01N 4380

Patent

active

059729813

ABSTRACT:
There is provided a method for the production of improved biocidal compositions which comprise at least one 3-isothiazolinone of the general formula ##STR1## Y is a hydrogen atom or an unsubstituted alkyl radical having 1 to 18 carbon atoms, a cylo alkyl radical having 5 to 8 carbon atoms, an aralkyl radical having 7 to 11 carbon atoms or an aryl radical having 6 to 10 carbon atoms and R and R' are in each case a hydrogen atom or halogen atom or a C.sub.1 to C.sub.4 -alkyl radical, or, when taken together, R and R' contain an alkylene group to form a hydrocarbon ring, 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 by storing it at a pH of 0.2 to 2.0 and a temperature of at most 40.degree. C. for a period of at least 2 days and then again neutralized to a higher pH in the range of 2.5 to 3.5.

REFERENCES:
patent: 3849430 (1974-11-01), Lewis et al.
patent: 3870795 (1975-03-01), Miller et al.
patent: 5068338 (1991-11-01), Bayer et al.
patent: 5312827 (1994-05-01), Bayer et al.
patent: 5824695 (1998-10-01), Baum

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