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US 4,379,137 AGranted
Disinfecting and preserving composition comprising a synergistic combination of a polymeric quaternary ammonium compound and a 3-isothiazolone compound
AssigneeSterling Drug Inc.
InventorsHelmut H. Ehlers, Heinz Eggensperger, Lothar Bucklers, Ulrich Eigener, Karl-Heinz Diehl, Norbert Weigand
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Abstract
The invention is a synergistic disinfecting and preserving composition comprising in admixture a polymeric quaternary ammonium compound and a 3-isothiazolone derivative, and a method of use thereof, for protecting aqueous systems against contamination by deleterious microorganisms.
Claims2
A synergistic bactericidal composition comprising in admixture
- (a) a mixture of polymeric quaternary ammonium compounds having the formula ##STR7## where A is --CH.sub.2 CH.dbd.CH--CH.sub.2 -- and n is a number from 2 to 30;
- and (b) a mixture of 5-chloro-2-methyl-3-isothiazolone and 2-methyl-3-isothiazolone;
- wherein the ratio of component (a) to component (b) is about 1:1 to 2:1.
Dependencies are inferred from the claim text.