Method of manufacture for hand-sanitizing lotion with prolonged effectiveness and resulting composition of matter
Inventors
Revellame, Emmanuel D. • Holmes, William E.
Assignees
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Publication Number
US-11547654-B2
Publication Date
2023-01-10
Expiration Date
Abstract
This invention is a novel method of manufacture for hand-sanitizing lotions that retains the added benefits of prolonged effectiveness while avoiding demulsification as well as the resulting product. The invention presents a novel, more simplified process comprising a lower cooking temperature and an optimized ingredient addition protocol, designed for product stability and ingredient integrity.
Core Innovation
The invention relates to a hand-sanitizing lotion having a stable microemulsion and a method of manufacturing the hand-sanitizing lotion. The microemulsion includes a water phase and an oil phase, with an emulsifier that is used to retain prolonged antimicrobial effectiveness while avoiding demulsification. The disclosed composition combines an antimicrobial active ingredient with skin protectant and anti-foam components within the microemulsion structure.
In one aspect, the method forms a first mixture by heating deionized water and mixing a waxy corn starch and at least one thickener, and forms a second mixture by heating soybean oil and blending at least one active ingredient, a skin protectant, and an anti-foam agent, wherein the active ingredient comprises benzalkonium chloride. The first and second mixtures are blended together, and gelatinizing and emulsifying are performed simultaneously by passing the resulting mixture through an agitation and heating means selected from chaos mixing and steam injection.
In another aspect, the invention specifies a method for manufacturing a hand-sanitizing microemulsion mixture by heating deionized water to 85 degrees Celsius and adding waxy cornstarch, pectin, and xanthan to form a first vessel mixture, and heating soybean oil to 85 degrees Celsius and adding benzalkonium chloride, petrolatum, and tri-n-butyl phosphate to form a second vessel mixture. The oil-phase blend is incorporated into the water-phase blend under high shearing and high heating conditions to produce a gelatinized and emulsified blended mixture, while preservative(s) and d--tocopherol acetate are successively added and the mixture is cooled to room temperature with a target viscosity and adjusted pH.
Claims Coverage
The document includes two independent claims. Across these claims, the core inventive features involve forming first and second mixtures, blending and simultaneously gelatinizing/emulsifying under specified agitation/heating conditions, successively adding preservative, antibacterial, and skin-soothing components, and achieving defined viscosity and pH targets for the final hand-sanitizing product.
First and second mixture formation with benzalkonium chloride active
Heating deionized water in a vessel, mixing a waxy corn starch and at least one thickener to said deionized water to create a first mixture, heating soybean oil in a second vessel, and adding at least one active ingredient, a skin protectant, and an anti-foam agent to said heated soybean oil and blending to create a second mixture wherein said at least one active ingredient comprises benzalkonium chloride.
Simultaneous gelatinizing and emulsifying by agitation and heating means
Blending said second mixture and said first mixture and gelatinizing and emulsifying the resulting mixture simultaneously by passing said resulting mixture through an agitation and heating means selected from the group consisting of chaos mixing and steam injection.
Successive addition of preservative, antibacterial agent, and skin soothing agent and cooling
Successively adding a preservative, at least one antibacterial agent, and at least one skin soothing agent to said resulting mixture to create and blend a final mixture and cool said final mixture until it reaches room temperature.
Microemulsion mixture manufacture with specified thickener and oil-phase components at 85 degrees Celsius
Heating deionized water in a vessel to a temperature of 85 degrees Celsius, adding waxy cornstarch, pectin, and xanthan to form a first vessel mixture, heating soybean oil in a second vessel to a temperature of 85 degrees Celsius, and adding benzalkonium chloride, petrolatum, and tri-n-butyl phosphate to form a second vessel mixture.
Incorporation under high shearing and high heating to form gelatinized and emulsified blend
Blending and incorporating said second vessel mixture into said first vessel mixture under high shearing and high heating conditions resulting in a gelatinized and emulsified blended mixture.
Preservative and d--tocopherol acetate addition with viscosity and pH targets
Stirring said blended mixture while successively adding at least one preservative selected from the group consisting of methyl paraben, propyl paraben, and d--tocopherol acetate to result in said microemulsion mixture, cooling said microemulsion mixture to room temperature while stirring until viscosity is between 3,250 and 3,750 cP, and adjusting the pH of the microemulsion mixture by adding hydrochloric acid and/or sodium hydroxide until the pH is between 3.9 and 4.1.
Across the independent claims, the manufacturing approaches center on creating a first water-phase mixture and a second oil-phase mixture, combining them and performing gelatinizing and emulsifying simultaneously via specified agitation/heating means or via high shearing/high heating incorporation. The claims further require successively adding preservative and skin-soothing components, including d--tocopherol acetate, while achieving defined viscosity and pH ranges in the microemulsion mixture.
Stated Advantages
Retains prolonged antimicrobial effectiveness while avoiding demulsification.
Documented Applications
Hand-sanitizing lotion; hand-sanitizing microemulsion mixture used as a hand-sanitizing composition.
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