Synergistic antimicrobial or biocidal mixtures including isothiazolones

摘要

Antimicrobial mixtures of isothiazolones and a metal complex with a polyfunctional ligand which are synergistic are described. The mixtures particularly include mixtures of a monocopper disodium citrate as the ligand and a 5-x-2-lower alkyl 4-isothiazolin-3-one wherein x is a halo or hydrogen group as the isothiazolone. The compositions are particularly useful for metal cutting fluids wherein long duration antimicrobial activity is desired.