Peracid/Peroxide Composition, Process for Accurately Making the Same, and Method for Use as an Evaporating Film Anti-Microbial Solution and as a Photosensitizer
First Claim
1. A method for the microbicidal treatment of a surface comprising the steps of:
- applying a microbicidal composition to form a thin layer that wets said surface, wherein said microbicidal composition comprises;
hydrogen peroxide in concentration in a range of about 0.4 to 8% by weight,peracetic acid in concentration in a range of about 0.02 to about 0.55% by weight,acetic acid in concentration less that about 8% by weight,phosphate ester surfactant in concentration in a range of about 0.01 to about 0.5% by weight,water soluble polymer containing lactam in concentration in a range of about 0.01 to about 0.5% by weight,less than 0.2% by weight of stabilizers selected from a group comprising inorganic phosphates, phosphonates, organic phosphonic acids or their salts, ethylenediaminetetracetic acid or its sodium salt,less than about 1 ppm of mono- and divalent metal ions,less than about 1 ppm of halide ions, anda balance of water; and
contacting said surface with said microbicidal composition for a contact time that is greater than about 20% but less than or equal to 100% of an evaporation time of said thin layer, during said contact time said thin layer evaporating.
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Accused Products
Abstract
A method is provided for the microbicidal treatment of a surface such as sanitization, disinfection, sterilization, and decontamination of a surface or object by use of an anti-microbial composition comprising an aqueous solution of peracetic acid and hydrogen peroxide with acetic acid, water soluble polymer containing lactam, and phosphate ester surfactant and little or no stabilizer, and according to the method enhanced microbicidal efficacy is obtained when the composition is applied onto a surface as a thin film wetting the surface so that a shorter contact time for a desired fractional reduction in microbial population is obtained Still further, the compositions comprise photosensitizer for light-activated anti-microbial efficacy.
15 Citations
34 Claims
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1. A method for the microbicidal treatment of a surface comprising the steps of:
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applying a microbicidal composition to form a thin layer that wets said surface, wherein said microbicidal composition comprises; hydrogen peroxide in concentration in a range of about 0.4 to 8% by weight, peracetic acid in concentration in a range of about 0.02 to about 0.55% by weight, acetic acid in concentration less that about 8% by weight, phosphate ester surfactant in concentration in a range of about 0.01 to about 0.5% by weight, water soluble polymer containing lactam in concentration in a range of about 0.01 to about 0.5% by weight, less than 0.2% by weight of stabilizers selected from a group comprising inorganic phosphates, phosphonates, organic phosphonic acids or their salts, ethylenediaminetetracetic acid or its sodium salt, less than about 1 ppm of mono- and divalent metal ions, less than about 1 ppm of halide ions, and a balance of water; and contacting said surface with said microbicidal composition for a contact time that is greater than about 20% but less than or equal to 100% of an evaporation time of said thin layer, during said contact time said thin layer evaporating. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A process for accurately making a batch of a microbicidal composition, wherein said batch of microbicidal composition comprises:
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hydrogen peroxide in concentration in a range of about 2.0 to 6% by weight, peracetic acid in concentration in a range of about 0.05 to about 0.74% by weight, an equilibrium quantity of acetic acid, phosphate ester surfactant in concentration in a range of about 0.025 to about 0.3% by weight, water soluble polymer in concentration in a range of about 0.025 to about 0.3% by weight, and a balance of water, the resulting microbicidal composition having an equilibrium concentration quotient of about - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A microbicidal composition comprising:
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hydrogen peroxide in concentration in a range of about 2.0 to 6% by weight, peracetic acid in concentration in a range of about 0.05 to about 0.74% by weight, an equilibrium quantity of acetic acid, phosphate ester surfactant in concentration in a range of about 0.025 to about 0.3% by weight, water soluble polymer in concentration in a range of about 0.025 to about 0.3% by weight, and a balance of water, the resulting microbicidal composition having an equilibrium concentration quotient of about - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34)
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Specification