Stabilizing Multi-Phase Personal Care Compositions via Perfume ClogP Selection
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Solution Overview
Problem
Multiphase personal care compositions with perfumes often face stability issues due to interactions between perfume raw materials and surfactants, leading to viscosity changes and phase separation, which affect lather and visual appearance.
Innovation Solution
Selecting at least 70% of perfume raw materials with a ClogP greater than 1.8 to enhance the hydrophobicity and stability of the composition, while using a preservative substantially free of formaldehyde and limiting the use of certain volatile perfume raw materials to maintain stability and consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If perfume raw materials with low ClogP (high volatility) are used to provide initial scent bloom, then the fragrance opens well, but the composition becomes less stable and more prone to phase separation
Solution Approach 1:
The patent applies parameter changes by selecting perfume raw materials based on their ClogP values, specifically choosing materials with ClogP greater than 1.8. This parameter-based selection criterion transforms the fragrance formulation approach from using volatile materials (low ClogP) to using less volatile, more stable materials (high ClogP), thereby resolving the contradiction between scent bloom and composition stability.
2Illumination intensity
If high levels of perfume are added to provide strong fragrance, then the scent intensity increases, but the composition forms a separate turbid phase and becomes visually unattractive
Solution Approach 1:
The patent changes the chemical parameter of the perfume raw materials by selecting those with ClogP greater than 1.8, which are less volatile and have different solubility characteristics. This parameter change allows for better integration of perfume into the surfactant micelle structure, preventing phase separation and maintaining visual appeal while still providing adequate fragrance intensity.
3Quantity of substance
If perfume raw materials are used that interact strongly with surfactant micelles, then fragrance absorption increases, but viscosity of the personal care composition increases and lather is reduced
Solution Approach 1:
The patent applies parameter changes by selecting perfume raw materials with ClogP greater than 1.8, which have optimized hydrophobicity. This parameter selection balances the interaction with surfactant micelles - sufficiently hydrophobic to be absorbed into micelles for fragrance delivery, but not so hydrophobic as to cause excessive viscosity increase or lather reduction. The specific ClogP threshold provides an optimal balance point.
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 approach stabilizes multiphase personal care compositions, ensuring consistent dispensing and maintaining their visual appeal by reducing phase separation and viscosity changes, thereby providing improved skin and hair care benefits.
Implementation Method 1
The Inventors believe that by choosing perfume raw materials for the composition, which more hydrophobic, stability of multi-phase personal care compositions is enhanced
Data Source
AI summary
A method of stabilizing a multiphase composition is described. The composition comprises a structured surfactant phase, a benefit phase and a perfume comprising perfume raw materials. The method comprises a step of selecting at least 70% of the perfume raw materials that have a ClogP of greater than 1.8.