Microbicidal compositions including a monochloramine and a peracid, and methods of using the same
AssigneeBuckman Laboratories International, Inc.
InventorsDavid Oppong, Luis Zugno, Thomas E. McNeel
Life of this patent
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Abstract
Microbicidal compositions including (a) monochloramine and (b) at least one peracid, are described. Components (a) and (b) can be present in a synergistically effective amount to control the growth of at least one microorganism. Methods for controlling the growth of microorganisms with the application of the monochloramine and at least one peracid are also disclosed.
Claims23
A method of controlling the growth of at least one microorganism in or on a product, material, or medium susceptible to attack by a microorganism, the method comprising treating the product, material or medium with at least a) monochloramine and b) peracetic acid wherein said a) monochloramine is present in an amount of from 1 ppm to 500 ppm and said b) peracetic acid is present in an amount of from 1 ppm to 500 ppm and said monochloramine and said peracetic acid are present in a synergistically microbicidally effective combined amount to control the growth of at least one microorganism, wherein said synergistically microbicidally effective combined amount is demonstrated by a formula of QA/Qa+QB/Qb, wherein
- Qa=Concentration of compound A in parts per million, acting alone, which produced an end point to completely prevent growth of a bacteria,
- Qb=Lowest concentration of compound B in parts per million, acting alone, which produced an end point to completely prevent growth of said bacteria,
- QA=Lowest concentration of compound A in parts per million, in the mixture, which produced an end point to completely prevent growth of said bacteria,
- QB=Lowest concentration of compound B in parts per million, in the mixture, which produced an end point to completely prevent growth of said bacteria,
- and where the sum of QA/Qa and QB/Qb is less than one, and wherein said bacteria is Pseudomonas aeruginosa or Enterobacter aerogenes.
A method for preventing or slowing down spoilage of a product, material, or medium caused by microorganism selected from bacteria, fungi, algae, or mixtures thereof, wherein the method comprises applying a) monochloramine and b) peracetic acid to the product, material, or medium wherein said a) monochloramine is present in an amount of from 1 ppm to 500 ppm and said b) peracetic acid is present in an amount of from 1 ppm to 500 ppm and said monochloramine and said peracetic acid are present in a synergistically microbicidally effective combined amount to control the growth of at least one microorganism, wherein said synergistically microbicidally effective combined amount is demonstrated by a formula of QA/Qa+QB/Qb, wherein
- Qa=Concentration of compound A in parts per million, acting alone, which produced an end point to completely prevent growth of a bacteria,
- Qb=Lowest concentration of compound B in parts per million, acting alone, which produced an end point to completely prevent growth of said bacteria,
- QA=Lowest concentration of compound A in parts per million, in the mixture, which produced an end point to completely prevent growth of said bacteria,
- QB=Lowest concentration of compound B in parts per million, in the mixture, which produced an end point to completely prevent growth of said bacteria,
- and where the sum of QA/Qa and QB/Qb is less than one, and wherein said bacteria is Pseudomonas aeruginosa or Enterobacter aerogenes.
Dependencies are inferred from the claim text.