Reversible Two-Phase Cosmetic Composition with Demixing Agents
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Solution Overview
Problem
Current cosmetic products with two visually distinguishable phases often become opaque after shaking, leading to an irreversible transformation, failing to provide a unique and pleasant user experience with desired appearances and textures.
Innovation Solution
A composition comprising a fatty phase with oils and an aqueous phase containing hydrophilic gelling agents and demixing agents like N,N-dimethylglycine derivatives or alkyl(poly)glucosides, which allows for a reversible transformation between two visually distinct phases, maintaining transparency and providing a pleasant skin sensory.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If cosmetic products with two visually distinguishable phases are shaken to mix the phases, then a mixture of phases is obtained which is favored by consumers, but the product becomes opaque and the transformation becomes irreversible
Solution Approach 1:
The patent applies dynamics by making the phase state of the composition changeable and reversible. The composition transitions from a separated two-phase state (at rest) to a mixed droplet state (when shaken), and can revert back to the separated state (after standing). This dynamic behavior allows the product to provide an appealing mixing experience while maintaining transparency stability over time through multiple application cycles.
Solution Approach 2:
The patent utilizes phase transitions by controlling the transition between separated phases and mixed phases. The composition undergoes reversible phase separation where the fatty phase separates from the aqueous phase when at rest, and forms an emulsion-like mixture with oil droplets when shaken. This controlled phase transition enables both the desired use experience and the maintenance of transparency.
2Stability of the object's composition
If cosmetic products with two visually distinguishable phases are designed to show reversible transformation, then the transformation can be repeated, but the phases appear blur or opaque
Solution Approach 1:
The patent applies parameter changes by carefully controlling the composition parameters including the specific selection of fatty phase components, aqueous phase components, and demixing agents. By adjusting these parameters, the composition achieves reversible phase separation while maintaining clear visual appearance. The demixing agents specifically control the interfacial properties to ensure sharp phase boundaries rather than blurred interfaces.
3Ease of operation
If cosmetic products provide a transformation of texture upon application, then consumer satisfaction increases, but the desired texture of oil droplets in aqueous phase is not achieved
Solution Approach 1:
The patent applies segmentation by dividing the composition into distinct fatty phase and aqueous phase components that remain visually distinguishable. When shaken, the fatty phase segments into discrete oil droplets dispersed in the aqueous phase, creating the desired texture appearance. The demixing agents ensure proper segmentation and distribution of oil droplets throughout the aqueous phase.
Solution Approach 2:
The patent uses demixing agents as intermediaries to control the interaction between the fatty phase and aqueous phase. These demixing agents mediate the phase separation process, ensuring that oil droplets form with appropriate size and distribution in the aqueous phase, achieving the desired texture appearance while maintaining system stability.
Data Source
AI summary
A composition comprising at least two visually distinguishable phases, comprises at least one fatty phase with oil, at least one aqueous phase with hydrophilic gelling agent, and at least one compound chosen from N,N-dimethylglycine derivatives, alkyl(poly)glucosides, or a mixture thereof.