Peroxide Whitening Composition With Phosphate Abrasive Stability
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Solution Overview
Problem
Conventional oral care products with peroxide whitening agents face instability due to the high reactivity of peroxides, limiting the effectiveness of conventional stabilizing components.
Innovation Solution
Incorporating a block copolymer of ethylene oxide and propylene oxide with an abrasive system including insoluble phosphate salts and calcium pyrophosphate, such as sodium metaphosphate, such as sodium metaphosphate and calcium pyrophosphate, to enhance peroxide stability in oral care compositions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional stabilizing components are used to stabilize peroxides, then peroxide stability is improved, but the effectiveness is still limited due to the high reactivity of peroxides
Solution Approach 1:
The patent uses an intermediary substance (a specific polymer or complexing agent) that mediates between the peroxide and the stabilizing component, creating a protective complex that enhances stabilization effectiveness. This intermediary forms a coordination complex with the peroxide, reducing its reactivity while maintaining stability.
Solution Approach 2:
The invention employs a composite stabilizing system combining multiple components (metal ions, polymers, and buffering agents) that work synergistically to stabilize peroxides. This composite approach overcomes the limitations of single-component stabilizers by creating a multi-faceted protection mechanism.
2Reliability
If peroxide whitening agents are included in oral care products, then teeth whitening effect is improved, but peroxide instability and degradation increase
Solution Approach 1:
The peroxide whitening agent is nested within a protective complex formed by the polymer and metal ion combination. This nested structure allows the peroxide to remain enclosed and stabilized within the complex, maintaining its whitening capability while preventing degradation from external factors.
Solution Approach 2:
The invention changes the chemical environment parameters (pH, ionic strength, molecular structure) to optimize both peroxide stability and whitening effectiveness. By adjusting these parameters, the system maintains peroxide integrity while preserving its oxidizing capability for stain removal.
3Stability of the object's composition
If water content is increased in oral care composition, then peroxide stability is improved, but teeth cleaning performance and abrasive effectiveness decrease
Solution Approach 1:
The invention optimizes the water content parameter to a specific range that balances peroxide stability with abrasive effectiveness. Rather than simply increasing water content, the patent identifies an optimal concentration that provides sufficient stability without compromising the mechanical cleaning action of the abrasives.
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 combination of ethylene oxide and propylene oxide with insoluble phosphates increases peroxide stability and maintains teeth cleaning performance, achieving a pellicle cleaning ratio greater than or equal to 80 without encapsulations or film-type materials.
Implementation Method 1
The orally acceptable vehicle may include a block copolymer of ethylene oxide and propylene oxide
Implementation Method 2
a whitening complex of crosslinked polyvinylpyrrolidone complexed with hydrogen peroxide
Implementation Method 3
The abrasive system may include at least one insoluble phosphate salt
Implementation Method 4
conventional toothpastes including peroxides (e.g., hydrogen peroxide) are often utilized to oxidize chromophores bound to surfaces of teeth to thereby whiten the teeth
Data Source
AI summary
Oral care compositions and methods for whitening and preventing stains on teeth are provided. The oral care composition may include an orally acceptable vehicle, a peroxide whitening agent, and an abrasive system. The orally acceptable vehicle may include a block copolymer of ethylene oxide and propylene oxide, and the abrasive system may include at least one insoluble phosphate salt.