Pyrithione biocides enhanced by zinc metal ions and organic amines

An antimicrobial composition concentrate comprising pyrithione or a pyrithione complex in an amount of from about 0.05% to about 20 weight percent, a zinc source in an amount of from about 0.01% to about 5%, and an organic amine component in an amount of from about 30% to about 80%, said percents being based upon the total weight of the composition concentrate said organic amine component comprising a first organic amine selected from an essential group consisting of 1,2-alkanolamines, 1,3-alkanolamines, and combinations thereof, alone or in combination with second organic amine selected from the an additional group consisting, of 1,2-alkanolamines, 1,3-alkanolamines, monomeric and polymeric forms of 1,2-alkyldiamines, monomeric and polymeric forms of 1,3-alkyldiamines, and combinations thereof, with the proviso that the first organic amine is present in said antimicrobial composition concentrate in an amount sufficient to insure that said amine component is soluble in said antimicrobial composition concentrate, and further comprising a formaldehyde source in order to provide available formaldehyde in the antimicrobial composition concentrate.

A method for providing a stable, soluble antimicrobial concentrate comprising from about 0.5% to about 20% of pyrithione, and a zinc source in an amount for from about 0.1% to about 10%, said method comprising incorporating into said concentrate a stabilizing effective amount of at least one organic amine component comprising a first organic amine selected from the group consisting of 1,2-alkanolamines, 1,3-alkanolamines, and combinations thereof, in combination with a second organic amine selected from the group consisting of monomeric and polymeric forms of 1,2-alkyldiamines, monomeric and polymeric forms of 1,3-alkyldiamines, and combinations thereof, with the proviso that the first organic amine is present in said antimicrobial composition in an amount sufficient to insure that said amine component is soluble in said antimicrobial composition.

A method for providing a stable, soluble antimicrobial concentrate comprising from about 0.5% to about 20% of pyrithione, and a zinc source in an amount for from about 0.1% to about 10%, said method comprising incorporating into said concentrate a stabilizing effective amount of at least one organic amine component selected from the group consisting of comprising a first organic amine selected from the group consisting of 1,2-alkanolamines, 1,3-alkanolamines, and combinations thereof, alone or in combination with a second organic amine selected from the groups consisting of 1,2-alkanolamines, 1,3-alkanolamines, monomeric and polymeric forms of 1,2-alkyldiamines, monomeric and polymeric forms of 1,3-alkyldiamines, and combinations thereof, with the proviso that the first organic amine is present in said antimicrobial composition in an amount sufficient to insure that said amine component is soluble in said antimicrobial composition, said stable, soluble antimicrobial concentrate, further comprises from about 0.5% to 30% of formaldehyde or a formaldehyde source.