Compositions and methods for use in surface decontamination
Inventors
KANG, JASON • Tyan, Kevin • Jin, Katherine
Assignees
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Publication Number
US-12116554-B2
Publication Date
2024-10-15
Expiration Date
Abstract
The disclosure provides compositions and methods for making a colorized solution of an aqueous disinfectant that is both stable in bulk solution and will fade to clear within a predetermined period of time after being applied to a surface, for example as a spray or film. The compositions and methods described here allow an end user to visualize both the extent of coverage and the duration of contact of the disinfectant with the surface, thereby providing more efficient disinfection of the surface.
Core Innovation
The invention relates to disinfecting a surface by mixing an oxidant-based disinfecting agent with a solid composition comprising a pH sensitive colorant, a surfactant, and a rheology modifier, and then applying the colored oxidant-based disinfecting agent to the surface. The solid composition is capable of colorizing the oxidant-based disinfecting agent when mixed therewith.
A key aspect is the use of an oxidizable, water-soluble pigment and pH sensitive dye components, together with stabilizing components including surfactants, alkaline builders, and optional rheology modifiers. The composition remains colored and stable in bulk for a period of time after mixing, and then fades to clear after a predetermined post-application interval to indicate surface coverage and disinfectant contact time.
The rheology modifier is selected to be distinct from the surfactant, and in additional embodiments an alkaline builder is included and is present in an amount sufficient to maintain a pH of 9-14. The disclosed composition component selections include examples of surfactants, rheology modifiers, and ROS-generating catalysts, along with optional perfume and other additives.
Claims Coverage
The independent claims are directed to methods for disinfecting a surface by mixing an oxidant-based disinfecting agent with a solid composition that produces a colored oxidant-based disinfecting agent and applying it to the surface. Two independent claims are presented, covering a pH sensitive colorant in defined amounts with surfactant and a non-surfactant rheology modifier, and a further independent claim that adds an alkaline builder with a defined amount.
Mixing an oxidant-based disinfecting agent with a solid composition to produce a colored disinfectant
Mixing an oxidant-based disinfecting agent and a solid composition comprising a pH sensitive colorant, a surfactant, and a rheology modifier; wherein the composition is capable of colorizing the oxidant-based disinfecting agent when mixed therewith.
P H sensitive colorant amount defining a colorizing solid composition
The pH sensitive colorant is present in an amount of from 1-10% w/w, based on the total weight of the composition.
High surfactant loading in the solid composition
The total amount of surfactant is present in an amount of from 25-97% w/w, based on total weight of the composition.
Non-surfactant rheology modifier as part of the solid composition
The rheology modifier is not the surfactant.
Applying the colored oxidant-based disinfecting agent to the surface
Applying the colored oxidant-based disinfecting agent to the surface.
Alkaline builder added to maintain pH while coloring oxidant disinfectant
Mixing an oxidant-based disinfecting agent and a solid composition comprising a pH sensitive colorant, a surfactant, an alkaline builder, and a rheology modifier; wherein the alkaline builder is present in an amount of from 2-50% w/w, based on the total weight of the composition; and wherein the composition is capable of colorizing the oxidant-based disinfecting agent when mixed therewith.
Overall, the claim set covers surface disinfection by mixing an oxidant-based disinfecting agent with a solid colorizing composition that includes a pH sensitive colorant in defined amounts, a surfactant in defined amounts, and a rheology modifier that is not the surfactant; a further independent claim adds an alkaline builder within a defined range. In both cases, the colored oxidant-based disinfecting agent is applied to the surface.
Stated Advantages
Provides colored oxidant-based disinfectant that fades to clear after a predetermined post-application interval to indicate surface coverage and disinfectant contact time.
Documented Applications
Disinfecting a surface by mixing a colorizing solid composition with an oxidant-based disinfecting agent and applying the colored disinfectant to the surface.
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