Anhydrous Oral Care Whitening Composition with cPVP Peroxide
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Solution Overview
Problem
Current tooth whitening products with high peroxide concentrations face challenges in maintaining effectiveness and microbial resistance, and often require additional antimicrobial agents to prevent spoilage and staining.
Innovation Solution
A substantially anhydrous oral care composition with a peroxide source bound to cross-linked polyvinylpyrrolidone (cPVP) and sodium tripolyphosphate (STPP), which provides a stable and viscous layer on the teeth, releasing hydrogen peroxide over time for whitening while inhibiting microbial growth without the need for additional preservatives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If high concentrations of peroxide source (e.g., 10% hydrogen peroxide) are used for whitening, then whitening effectiveness is improved, but microrobustness deteriorates and additional antimicrobial agents are required
Solution Approach 1:
The patent changes the concentration parameter of hydrogen peroxide from high (10%) to low (0.01-5.5%), and compensates for the reduced whitening effectiveness by optimizing other formulation parameters including the use of specific polymers, surfactants, and pH adjusters to enhance peroxide delivery and stability at lower concentrations
Solution Approach 2:
The patent creates a composite oral care composition integrating multiple functional components: low concentration peroxide source, polymers for stability and delivery, surfactants for adhesion, pH buffers for stability, and optional antimicrobial agents, where the synergistic interaction of these components achieves both effective whitening and microrobustness
2Productivity
If high concentrations of peroxide source are used, then whitening effectiveness is improved, but stability and microrobustness worsen requiring additional preservatives
Solution Approach 1:
The patent optimizes multiple formulation parameters simultaneously: reduces peroxide concentration to 0.01-5.5%, adjusts pH to 2-9 for stability, selects specific polymer types and concentrations (0.1-10%) for viscosity and stability, and optimizes surfactant levels (0.01-5%) for adhesion, achieving effective whitening without requiring high peroxide concentrations or complex preservative systems
Solution Approach 2:
The patent designs multi-functional components that perform multiple roles: polymers provide both viscosity control and peroxide stabilization, surfactants provide both adhesion and antimicrobial enhancement, and pH buffers provide both stability and antimicrobial support, reducing the need for separate dedicated preservative systems
3Reliability
If lower peroxide concentrations are used, then microrobustness is improved, but whitening effectiveness deteriorates
Solution Approach 1:
The patent introduces polymers and surfactants as intermediary substances that facilitate peroxide delivery to the tooth surface. These intermediaries enhance the bioavailability and effectiveness of low concentration peroxide (0.01-5.5%) by improving adhesion to dental surfaces, controlling release kinetics, and protecting peroxide from premature decomposition, thereby achieving effective whitening without high peroxide concentrations
Solution Approach 2:
The patent formulates the composition to provide continuous peroxide delivery over an extended period through controlled release mechanisms involving polymers and surfactants, ensuring sustained whitening action throughout the product's residence time on the tooth surface, which compensates for the lower peroxide concentration
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 effectively whitens teeth with lower peroxide concentrations, maintains stability, and prevents microbial growth and staining, offering improved microrobustness and extended whitening duration without the need for antimicrobial agents.
Implementation Method 1
a peroxide source comprising cPVP-hydrogen peroxide complex in an amount to provide from 0.01% to 5.5% of hydrogen peroxide by weight of the composition
Implementation Method 2
the composition when applied to the teeth is sufficiently viscous to form an adherent, continuous layer on a dental surface and deliver an effective amount of said peroxide source to a tooth surface
Implementation Method 3
sodium tripolyphosphate (STPP); in an amount of from 0.05 to 3% by weight of the composition
Data Source
Figure 1
AI summary
Described herein are whitening compositions comprising a substantially anhydrous or non-aqueous oral care composition comprising: a peroxide source comprising hydrogen peroxide bound to cross-linked polyvinylpyrrolidone (cPVP) in the amount effective to provide from 0.01% to 5.5% of hydrogen peroxide, by weight of the composition; a hydrophobic component comprising a silicone polymer; sodium tripolyphosphate; and optionally a dental surface adhesion enhancing agent. Methods of making and using these compositions are also described herein.