Additive compositions for pigmented disinfection and methods thereof
Inventors
KANG, JASON • Tyan, Kevin • Jin, Katherine
Assignees
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Publication Number
US-11583603-B2
Publication Date
2023-02-21
Expiration Date
Abstract
The invention provides to a powdered composition of additives and a method of use thereof for increasing the visibility, potency and coverage of disinfectant solutions, such as bleach.
Core Innovation
The document discloses a solid composition comprising particles that include a surfactant, a water-soluble pigment, a thickening agent, an alkaline builder, and a hydrotrope. The surfactant is described as sodium dodecyl sulfate in one formulation, and other surfactants are listed in another formulation. The pigment is water-soluble and functions as a color indicator for a disinfectant.
The document describes mixing the solid composition into a liquid disinfectant, including aqueous bleach, so that the disinfectant is colored for improved visibility when sprayed or applied as a film on a surface. The disclosed color is designed to fade within a pre-selected period after application, with a described range of about 3–10 minutes and examples discussing longer ranges. The fading is stated to result in the disinfectant returning to a clear appearance without staining.
The compositions further include optional formulation components such as alkaline builders selected from sodium hydroxide and potassium hydroxide, oxidizing agents, and reducing agents. Thickening agents and hydrotropes are used as part of the particle composition, and the document describes how the inclusion of a surfactant is intended to improve stickiness and reduce droplet beading on hydrophobic surfaces such as PPE. The document also provides pathogen efficacy results for a bleach-based example, described as comparable to regular bleach.
Claims Coverage
The partial content explicitly provides two independent solid-composition claims and one method claim, with related dependent coverage. Across these families, the main inventive features are directed to particle-based disinfectant visibility using a combination of surfactant, water-soluble pigment, thickening agent, alkaline builder, and hydrotrope, with optional oxidizing/reducing agents and method dependents that specify spray/film application and a color fade window of 3–10 minutes.
Particle surfactant–pigment–thickener–alkaline builder–hydrotrope blend
A solid composition comprising particles including a surfactant that is sodium dodecyl sulfate, a water-soluble pigment, a thickening agent, an alkaline builder selected from sodium hydroxide and potassium hydroxide, and a hydrotrope selected from sodium p-toluenesulfonate, potassium toluene-4-sulphonate, sodium xylenesulfonate, potassium xylenesulphonate, and sodium cumenesulfonate.
Alternative surfactant selection with the same particle functional set
A solid composition comprising particles including a surfactant selected from sodium dodecylbenzenesulfonate, hexadecyltrimethylammonium bromide, and sodium 3,4-dichlorobenzoate, a water-soluble pigment, a thickening agent, an alkaline builder selected from sodium hydroxide and potassium hydroxide, and a hydrotrope selected from sodium p-toluenesulfonate, potassium toluene-4-sulphonate, sodium xylenesulfonate, potassium xylenesulphonate, and sodium cumenesulfonate.
Visibility-enhanced disinfectant with color fading within a time window
A method of mixing a composition with a liquid disinfectant so it is applied as a spray or film on a surface with colored disinfectant, where the applied color fades within 3 to 10 minutes after application.
The partial claim set is directed to solid particle compositions that combine a specific surfactant, a water-soluble pigment, a thickening agent, an alkaline builder, and a defined hydrotrope selection. Dependent coverage further specifies particular oxidizing/reducing agents and lists specific pigment and thickening agent options, while method dependents frame use with spray/film application and require color fading within 3–10 minutes; one dependent narrows the disinfectant to an aqueous bleach solution.
Stated Advantages
Improved visibility of a liquid disinfectant when sprayed or applied as a film.
Color fades after application to leave a clear appearance without staining.
Improved spray coverage and comparable killing efficacy to regular bleach.
Improved stickiness and reduced droplet beading on hydrophobic surfaces.
Documented Applications
Mixing the disclosed solid additive composition into a liquid disinfectant, including aqueous bleach, for spray or film application to a surface with color fading within a described time period.
Use of a bleach-based additive composition described as having West Nile virus efficacy results comparable to regular bleach.
A formulation described for peracetic-acid disinfectants using the pigment/colorant approach.
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