Oxidizing Hair Composition Stability via pH and Oil Ratio
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Solution Overview
Problem
Existing oxidizing compositions for hair coloring and bleaching are unstable due to the introduction of significant oil content, leading to phase destabilization over time, which affects the performance and longevity of the hair treatment.
Innovation Solution
A composition comprising fatty alcohols, oxyalkylenated fatty alcohols, oxidizing agents, and at least 10% oils by weight, with a fatty alcohol to oxyalkylenated fatty alcohol ratio of less than or equal to 5, and a pH between 1.5 and 4.5, providing improved stability and performance for hair treatments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If significant oil content is introduced into oxidizing composition to improve active ingredient performance, then the performance of coloring and bleaching agents is improved, but the composition becomes unstable and phases separate over time
Solution Approach 1:
The patent changes the chemical parameters of the oil by specifying precise fatty acid composition (C12-C18 saturated fatty acids at 70-90% content) and controlling the pH value (1.5-4.5). These parameter changes transform the oil from a phase-separating component into a stable composition element that maintains homogeneity while preserving active ingredient performance.
Solution Approach 2:
The patent creates a composite oil system combining specific fatty acids (lauric, myristic, palmitic, stearic) with controlled amounts of unsaturated fatty acids and amino acid derivatives. This composite structure provides both the performance benefits of oil-based formulations and the stability of a carefully engineered molecular mixture that resists phase separation.
2Productivity
If oil content is increased to replace water and improve active ingredient performance, then the effectiveness of coloring and bleaching is enhanced, but the composition shifts from phase after a few days
Solution Approach 1:
The patent严格控制 the pH value between 1.5 and 4.5, which is a critical parameter change that prevents oil degradation and phase separation during storage. This acidic pH environment stabilizes the oil composition while maintaining the effectiveness of oxidizing agents for coloring and bleaching.
Solution Approach 2:
The patent introduces amino acid derivatives as intermediary substances that act as stabilizing agents between the oil and water phases. These intermediaries prevent direct phase separation while allowing the oil to maintain its performance-enhancing properties for active ingredients throughout the product shelf life.
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 achieves stable and effective hair coloring or bleaching results, maintaining performance over time, including resistance to shampooing, light, and sweat, while preserving the cosmetic properties of hair.
Implementation Method 1
oxidizing compositions are used in oxidation hair dyeing, which are mixed with oxidation dyes (bases and couplers), which are colorless by themselves, to generate colored and coloring compounds by a process of oxidative condensation
Implementation Method 2
the pH of the composition being between 1.5 and 4.5
Data Source
AI summary
The present invention relates to a composition for the treatment of keratin fibers, and in particular human keratin fibers such as hair, comprising, in a cosmetically acceptable medium, one or more fatty alcohols; one or more oxyalkylated fatty alcohols; one or more oxidizing agents; and at least 10% by weight of the total composition weight of one or more oils other than the fatty alcohols; the weight ratio of fatty alcohols to oxyalkylated fatty alcohols being less than or equal to 5. The composition according to the invention can be used for coloring and/or bleaching or permanent deformation of keratin fibers. It exhibits good stability and allows for the preparation of ready-to-use compositions resulting in good coloring, bleaching, or permanent deformation properties without degrading the keratin fibers or altering their cosmetic properties.Furthermore, the composition according to the invention exhibits good stability over time, particularly when stored at high temperatures, for example around 45°C.