Anhydrous Spheroids in Solid Aqueous Cosmetic Phase
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Solution Overview
Problem
Current cosmetic compositions fail to create stable, non-allergenic, macroscopically heterogeneous solid compositions with anhydrous spheroids dispersed in a solid aqueous continuous phase, as existing methods damage the spheroids during incorporation and lack control over size and stability, resulting in deformation, melting, or insufficient hardness.
Innovation Solution
A cosmetic composition comprising anhydrous spheroids made of hydrocarbon-based oils and/or silicone oils combined with lipophilic structuring agents, dispersed in a solid aqueous continuous phase with hydrophilic gelling agents, which is free or low in surfactants, allowing for a stable and flexible texture that maintains shape and provides a refreshing sensory experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If anhydrous spheroids are incorporated into a hot liquid continuous phase by stirring, then the composition can be prepared, but the spheroids are damaged by melting or deformation
Solution Approach 1:
The spheroids are pre-formed with a protective outer coating before incorporation into the continuous phase. This preliminary protective layer prevents damage during the hot liquid stirring process, allowing the spheroids to maintain their shape while being incorporated into the cosmetic composition.
Solution Approach 2:
An outer coating acts as an intermediary layer between the spheroid core and the hot liquid continuous phase. This coating layer protects the spheroid from direct contact with the hot liquid, preventing melting and deformation while allowing incorporation into the composition.
2Shape
If spheroids are made harder to maintain shape, then shape stability improves, but the composition becomes too rigid for comfortable skin application
Solution Approach 1:
The spheroid structure is designed with different properties in different regions: the core provides hardness and shape stability, while the outer coating provides flexibility and softness. This local differentiation allows the spheroids to maintain their shape during storage while being comfortable during skin application.
Solution Approach 2:
The spheroids are constructed as composite structures with a core material providing shape stability and an outer coating material providing flexibility. This composite structure combines the benefits of both materials, achieving both shape maintenance and skin application comfort.
3Strength
If the composition is made rigid for various forms (stick, cast), then structural integrity improves, but it becomes difficult to take up and apply to skin
Solution Approach 1:
The composition exhibits dynamic properties that allow it to transition between rigid and flexible states. In its stored form, it maintains structural integrity as a rigid stick or cast, but during application, it becomes sufficiently flexible to be easily taken up and applied to the skin through rubbing or sponge.
4Device complexity
If spheroids are made without outer coating to simplify composition, then manufacturing complexity reduces, but spheroids cannot be stably incorporated without damage
Solution Approach 1:
An outer coating acts as an intermediary protective layer that enables stable incorporation of spheroids into the cosmetic composition. This coating prevents direct contact between the spheroid core and the continuous phase, eliminating damage during mixing and ensuring long-term stability of the dispersion.
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 is solid at room temperature, maintains spheroid shape and stability, offers a pronounced freshness effect, and combines properties like freshness and gloss, while being tolerant and persistent on the skin, with improved industrial scalability and packaging efficiency.
Implementation Method 1
an aqueous continuous phase, which is solid at room temperature, comprising at least one hydrophilic gelling agent and water
Implementation Method 2
anhydrous spheroids dispersed in a solid aqueous continuous phase
Data Source
AI summary
The invention relates to a solid cosmetic composition comprising anhydrous spheroids dispersed in a solid aqueous continuous phase. The invention is also directed toward a process for preparing a solid cosmetic composition according to the invention, and also a process for making up and/or caring for bodily and/or facial skin using a solid cosmetic composition according to the invention. The invention is also directed toward a stick or a solid gel cast in a dish or a pot, and more particularly a lipstick, a foundation, and an antisun stick, comprising a cosmetic composition according to the invention.