Shampoo Microemulsion Stabilizes Oil Particles
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Solution Overview
Problem
Existing cosmetic products, particularly shampoos, face challenges in providing effective conditioning while avoiding alkoxylated surfactants, which can cause skin irritation and subpar performance compared to silicone-containing preparations, and struggle to maintain transparency and stability with oil particles.
Innovation Solution
Incorporating a microemulsion with non-alkoxylated anionic, zwitterionic, or amphoteric surfactants, combined with cationic polymers, to stabilize oil particles and enhance conditioning properties, achieving transparent and stable formulations with improved foam properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silicones are used as conditioners in shampoo compositions, then conditioning performance is improved, but hair health deteriorates and future coloring/perming becomes problematic
Solution Approach 1:
The patent removes silicones from the formulation entirely, extracting the harmful component while maintaining conditioning functionality through alternative non-silicone conditioning agents and microemulsion systems that provide similar benefits without the damaging effects on hair structure and future chemical treatments
Solution Approach 2:
The patent replaces long-lasting silicone conditioners with biodegradable, naturally derived conditioning agents that provide temporary but sufficient conditioning effects, allowing the hair to breathe and recover without the buildup of silicone residues that compromise future coloring and perming
2Reliability
If oils and waxes are used as conditioning agents, then conditioning effect is provided, but formulation becomes cloudy and stability is limited to small amounts
Solution Approach 1:
The patent nests oil particles within a microemulsion structure, creating a core-shell system where oil droplets are encapsulated within a stabilizing emulsion matrix. This nested configuration allows high concentrations of conditioning oils to remain dispersed and stable without causing cloudiness, as the microemulsion structure prevents oil aggregation and phase separation
Solution Approach 2:
The patent introduces surfactants and emulsifiers as intermediary substances that mediate between the oil phase and aqueous phase. These intermediaries form a stable interface that prevents oil droplets from coalescing, enabling high oil content formulations to remain clear and stable while providing effective conditioning effects
3Ease of operation
If alkoxylated surfactants are used in cosmetic products, then surfactant performance is achieved, but skin irritation occurs and green cosmetic standards are not met
Solution Approach 1:
The patent changes the chemical parameters of the surfactant system by replacing alkoxylated compounds with non-alkoxylated alternatives. This parameter change maintains the essential surfactant functionality and performance characteristics while eliminating the harmful skin irritation effects associated with alkoxylated ingredients, thereby meeting green cosmetic standards
Solution Approach 2:
The patent converts the challenge of achieving surfactant performance without alkoxylated compounds into an opportunity to use naturally derived, skin-friendly surfactants. By embracing non-alkoxylated alternatives, the formulation achieves both effective cleaning action and skin compatibility, transforming a limitation into a beneficial differentiation for green cosmetic markets
4Reliability
If larger amounts of oil particles are incorporated into the formulation, then conditioning properties are improved, but transparency and stability become difficult to maintain
Solution Approach 1:
The patent nests oil particles within a microemulsion structure, creating a core-shell system where oil droplets are encapsulated within a stabilizing emulsion matrix. This nested configuration allows high concentrations of conditioning oils to remain dispersed and stable without causing cloudiness, as the microemulsion structure prevents oil aggregation and phase separation
Solution Approach 2:
The patent creates a composite microemulsion system combining multiple components: oil phase, aqueous phase, surfactants, and stabilizing agents. This composite structure leverages the synergistic interactions between components to achieve both high oil content and formulation stability, with the composite nature of the microemulsion providing both transparency and long-term 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 solution provides conditioning performance comparable to or exceeding silicone-containing products, while maintaining transparency and stability, and avoiding the use of alkoxylated surfactants, thus addressing the limitations of existing shampoos.
Implementation Method 1
The microemulsions of component (b) have an average particle size of less than 1 μm. These emulsions are produced by first producing, in a first step, a microemulsion containing at least 10 - 20% by weight of an alkyl (oligo) glycoside
Implementation Method 2
Non-alkoxylated anionic, zwitterionic or amphoteric surfactants can be included as component a). Typical examples of anionic surfactants are soaps, alkyl benzene sulfonates, alkane sulfonates, olefin sulfonates
Implementation Method 3
which are then stabilized synergistically with the cationic polymers of component (c) in the composition by the surfactants of component (a)
Data Source
AI summary
The invention relates to a cosmetic preparation that contains (a) at least one surfactant selected from non-alkoxylated anionic, zwitterionic or amphoteric surfactants, (b) a microemulsion and (c) at least one cationic polymer.