Peroxide Whitening Complex for Stable Oral Care
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional oral care products containing peroxides for teeth whitening face challenges in stability and consistent delivery of hydrogen peroxide due to its reactivity and decomposition, leading to variable whitening efficacy and storage issues.
Innovation Solution
An oral care composition incorporating a peroxide whitening complex, a block copolymer of ethylene oxide and propylene oxide, stearate, and a humectant like propylene glycol, which maintains stability and delivers a consistent amount of hydrogen peroxide, up to 8% by weight, while being free or substantially free of water and abrasives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional oral care products contain peroxides for teeth whitening, then whitening efficacy is improved, but stability and consistent delivery of hydrogen peroxide deteriorate due to decomposition
Solution Approach 1:
The patent uses PVP (polyvinylpyrrolidone) as an intermediary carrier to complex with hydrogen peroxide, forming a stable PVP-H2O2 complex. This mediator protects the reactive peroxide from direct decomposition while enabling controlled release during oral care application, thus maintaining both stability and whitening efficacy consistency.
Solution Approach 2:
The invention creates a composite formulation combining PVP-H2O2 complex with specific surfactants (block copolymer of ethylene oxide and propylene oxide, stearate) and humectants (propylene glycol). This composite system enhances the stability of the peroxide complex while maintaining effective delivery, resolving the contradiction between stability and efficacy.
2Reliability
If hydrogen peroxide is used in high concentrations for whitening, then whitening performance is improved, but decomposition and storage issues worsen
Solution Approach 1:
PVP serves as a protective intermediary that allows formulation with high peroxide content (providing 3-8% hydrogen peroxide) while preventing spontaneous decomposition during storage. The complexation with PVP stabilizes the high-concentration peroxide, enabling both strong whitening performance and storage stability.
Solution Approach 2:
The patent changes the physical-chemical parameters of the peroxide system by forming a complex with PVP, which alters the decomposition kinetics and stability profile of hydrogen peroxide. This parameter change enables high peroxide concentration to be maintained stably during storage while remaining effective for whitening.
3Reliability
If peroxide compounds are used for whitening, then whitening capability is improved, but formulation difficulty increases due to high reactivity
Solution Approach 1:
PVP acts as a formulation intermediary that tames the high reactivity of peroxide compounds. By complexing with PVP, the peroxide becomes easier to formulate with other oral care ingredients while maintaining its whitening capability, thus improving formulation ease without sacrificing performance.
Solution Approach 2:
The patent develops a composite formulation system where PVP-H2O2 complex is combined with specific surfactants and humectants that are compatible with the peroxide complex. This composite approach simplifies the formulation process by providing a stable, pre-complexed peroxide system that is easier to integrate into final toothpaste or oral care products.
4Reliability
If bound hydrogen peroxide sources are used (urea peroxide, calcium peroxide, sodium percarbonate), then peroxide delivery is improved, but formulation stability deteriorates
Solution Approach 1:
The patent uses PVP as an intermediary to complex with hydrogen peroxide, creating a more stable formulation system compared to conventional bound peroxide sources. The PVP-H2O2 complex provides reliable peroxide delivery while maintaining better formulation stability, avoiding the stability issues associated with urea peroxide, calcium peroxide, or sodium percarbonate.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition provides enhanced stability and effective delivery of hydrogen peroxide, maintaining whitening efficacy over time without the issues of decomposition and storage-related problems, ensuring consistent tooth whitening performance.
Implementation Method 1
a block copolymer of ethylene oxide and propylene oxide in an amount from about 0.01% to about 8.0% by weight of the composition
Implementation Method 2
conventional toothpastes containing peroxides (e.g., hydrogen peroxide) are often utilized to oxidize chromophores either bound to surfaces of teeth, or accumulated beneath the teeth surface, to thereby whiten the teeth
Implementation Method 3
a humectant (e.g., propylene glycol) in an amount from about 60% to about 90% by weight of the composition
Data Source
AI summary
Disclosed herein are oral care compositions comprising an oral care composition comprising a peroxide whitening complex present in an amount to provide from about 3.0% to about 8% of hydrogen peroxide by weight of the composition; a block copolymer of ethylene oxide and propylene oxide in an amount from about 0.01% to about 8% by weight of the composition; a stearate in an amount from about 0.3% to about 5% by weight of the composition; and a humectant in an amount from about 60% to about 90% by weight of the composition. Methods of making and using the oral care compositions are also provided.