Three-Layer Hair Conditioning Composition with Density-Based Separation
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Solution Overview
Problem
Existing multi-layered cosmetic compositions often require high concentrations of surfactants, emulsifiers, and salts to maintain stability, which can be irritating, and may take longer to separate upon mixing, losing appeal over time, while also incorporating natural oils and silicones poses challenges in achieving clean layer separation without stickiness or unnatural shine.
Innovation Solution
A three-layer composition comprising a top oil phase, middle silicone phase, and bottom polyol phase, with specific density and viscosity ranges, achieving clean separation without substantial surfactants or emulsifiers, using less than 1% mineral oil and salts, and incorporating beneficial essential oils for hair care, allowing for homogenous mixing and re-separation within minutes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If high concentrations of surfactants, emulsifiers, and salts are used to maintain layer separation, then layer stability is improved, but user irritation increases and separation time increases
Solution Approach 1:
The patent removes harmful substances (surfactants, emulsifiers, and salts) from the multi-layered composition entirely, achieving layer separation through the inherent immiscibility of the liquid layers without requiring any separation agents. This extraction of harmful components resolves the contradiction by maintaining layer stability while eliminating user irritation.
Solution Approach 2:
The composition achieves layer separation through the natural properties of the liquid layers themselves (density differences and immiscibility) without requiring any additional agents. The system is self-sufficient, using its own compositional characteristics to maintain stability and enable separation, thereby avoiding harmful additives.
2Stability of the object's composition
If high concentrations of surfactants and emulsifiers are used to combine oils, silicones, and hydrophilic materials, then mixture stability is improved, but the multi-layered appearance and clean separation are lost
Solution Approach 1:
The patent divides the composition into three distinct liquid layers that remain separate rather than forming a unified emulsion. Each layer maintains its identity and boundaries, creating a multi-layered structure with clean interfaces. This segmentation approach resolves the contradiction by achieving stability through layer separation rather than emulsion formation.
Solution Approach 2:
Instead of using emulsifiers to combine materials into a homogeneous emulsion, the patent inverts the approach by using immiscible liquids that naturally separate into distinct layers. The stability mechanism is reversed from emulsion-based to separation-based, achieving the desired multi-layered appearance without compromising stability.
3Ease of operation
If repeated mixing occurs during regular use, then product application is facilitated, but existing multi-layered systems take longer and longer to return to separated state
Solution Approach 1:
The patent optimizes physical parameters including density differences between layers, viscosity ratios, and interfacial tension characteristics to ensure rapid re-separation after mixing. By carefully controlling these parameters, the composition returns to its separated state quickly even after repeated mixing during use, resolving the contradiction between ease of application and re-separation time.
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 can be mixed homogenously in seconds and remains stable for use before separating into distinct layers, maintaining aesthetic appeal and providing hair benefits without irritation, using minimal amounts of potentially harmful ingredients.
Implementation Method 1
one liquid layer is incompatible with one or more other liquid layers. By 'incompatible', we mean that the layers are mutually insoluble and mutually non-reactive. Because of this, the less dense layers tend to sit on top of the more dense layers.
Implementation Method 2
the layers are mutually insoluble and mutually non-reactive
Implementation Method 3
The separated layers may be mixed within each other prior to use, by shaking the composition
Data Source
AI summary
Personal care compositions comprising three liquid layers, particular useful for treating hair. The compositions are visually three separate layers. One layer comprises an oil phase, one layer comprises a polyol phase, and one layer comprises a silicone phase. The compositions can be mixed homogenously upon shaking, and remain homogenous for a sufficient period of time to allow the consumer to use the product, before it separates into three distinct layers again. The compositions do not have substantial amounts of surfactants or emulsifiers, and no more than 1% of salts or mineral oil.