PEG-Stabilized High Water Dentifrice Phase Stability
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Solution Overview
Problem
High water and high carbonate dentifrice formulations face phase stability issues, particularly when containing certain flavor components, which can lead to separation and instability over time, especially in high temperatures or long distribution periods.
Innovation Solution
Incorporating polyethylene glycol (PEG), specifically PEG-9 to PEG-13, which stabilizes the toothpaste formulation by improving flavorant solubility, increasing surfactant dissolution, and reducing surfactant critical micelle concentration, thereby maintaining phase stability and accommodating a range of flavorants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If high water and high carbonate formulation chassis are used, then cost effectiveness is improved, but phase stability deteriorates
Solution Approach 1:
PEG acts as an intermediary substance that mediates between the water/carbonate phase and flavor components. It forms a bridging layer that prevents phase separation while maintaining the cost-effective high water/high carbonate formulation structure, thus resolving the contradiction between cost effectiveness and phase stability.
Solution Approach 2:
The invention changes the chemical composition parameters by introducing PEG at specific concentrations (0.1-15% by weight). This parameter change modifies the interfacial properties and solubility characteristics of the formulation, enabling phase stability to be achieved without compromising the cost-effective base formulation.
2Adaptability or versatility
If certain flavor components are added, then product acceptance is improved, but phase stability deteriorates
Solution Approach 1:
PEG serves as a mediator that enhances the compatibility between diverse flavor components and the aqueous carbonate base. It provides a solubilizing effect that allows a broader spectrum of flavors (including medium to low polarity flavorants) to be incorporated without causing phase separation.
Solution Approach 2:
The formulation creates a composite system where PEG combines with water, carbonate, and various flavor components to form a stable multiphase emulsion. This composite approach allows multiple flavorants with different polarities to coexist stably in the high water/high carbonate chassis.
3Ease of manufacture
If high water and high carbonate levels are maintained, then cost effectiveness is improved, but compatibility with flavorants deteriorates
Solution Approach 1:
PEG acts as a compatibility-enhancing intermediary that bridges the gap between the polar aqueous carbonate environment and non-polar/low-polarity flavorant molecules. It provides solubilization and stabilization without requiring changes to the cost-effective high water/high carbonate base formulation.
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 use of PEG results in phase stable dentifrice compositions that resist syneresis, maintaining stability for several months and reducing the need for humectants, thus minimizing cost and complexity while providing a broad spectrum of consumer-acceptable flavors.
Implementation Method 1
improving the solubility of the flavorant
Implementation Method 2
increasing dissolution of surfactant (e.g., sodium lauryl sulfate)
Implementation Method 3
decreasing critical micelle concentration of surfactant
Implementation Method 4
the PEG stabilizes the emulsion of the toothpaste formulation
Data Source
AI summary
A oral care composition comprising 20% to 75% of water by weight of the composition; 25% to 60% of a calcium-containing abrasive by weight of the composition; 0.1% to 15%, of a polyethylene glycol (PEG) by weight of the composition; and 0.001% to 5% of a flavorant composition by weight of the oral care composition.