Surfactant-Free Emulsion Cosmetic Composition for Active Stability
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Solution Overview
Problem
Conventional emulsion cosmetic compositions face issues with stability when containing unstable active ingredients, leading to separation or precipitation, and high-content surfactants used for stability are not environmentally friendly or safe for the skin.
Innovation Solution
An emulsion cosmetic composition using an aqueous phase with a self-emulsifying agent and a self-emulsifying stabilizer, without surfactants, to achieve high interfacial stability between the aqueous and oil phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If high-content surfactants are used to increase formulation stability, then the stability of emulsion cosmetic composition is improved, but environmental friendliness and skin safety deteriorate
Solution Approach 1:
The patent removes surfactants from the formulation entirely, extracting the harmful component while maintaining stability through alternative mechanisms. The invention uses a self-emulsifying agent and self-emulsifying stabilizer that do not require surfactants, thereby eliminating skin irritation and environmental harm associated with conventional surfactant-based stabilizers.
Solution Approach 2:
The patent introduces a self-emulsifying agent and self-emulsifying stabilizer as intermediary substances that mediate between the aqueous and oil phases without requiring surfactants. These intermediaries achieve interfacial stability through their unique molecular structures and self-assembly properties, replacing the traditional surfactant mediator.
2Reliability
If conventional surfactant-based emulsifiers are used to maintain interfacial stability, then the stability between aqueous and oil phases is improved, but the formulation becomes less environmentally friendly and less skin-safe
Solution Approach 1:
The patent changes the fundamental parameters of the emulsifying system by replacing surfactant-based mechanisms with self-emulsifying agent-based mechanisms. This parameter change involves altering the molecular structure and interaction modes of the emulsifying components, enabling interfacial stability through non-surfactant pathways that are environmentally friendly and skin-safe.
3Adaptability or versatility
If the formulation contains unstable active ingredients, then the functional effectiveness is improved, but the formulation stability deteriorates leading to separation or precipitation
Solution Approach 1:
The self-emulsifying agent and self-emulsifying stabilizer act as intermediary substances that create a stable interface between aqueous and oil phases, preventing separation and precipitation of unstable active ingredients. This intermediary mechanism allows the formulation to accommodate a wide range of active ingredients while maintaining overall stability.
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 exhibits excellent stability, reduces skin irritation, and is environmentally friendly, with improved spreadability, makeup durability, and water resistance, while effectively stabilizing active ingredients like vitamin C.
Implementation Method 1
an aqueous phase containing a self-emulsifying agent and a self-emulsifying stabilizer
Data Source
AI summary
The present invention relates to an emulsion cosmetic composition with excellent stability.