Oxidizing Composition Stabilization Using Phosphoric Acid Salts
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Solution Overview
Problem
Existing oxidizing compositions for hair treatment, particularly those with high oil content and pH values around 2, tend to destabilize over time, leading to a loss of efficacy.
Innovation Solution
An aqueous composition comprising at least one oxidizing agent, at least 40% oil, and a phosphoric acid mineral salt, with a pH of 5 or less, which provides improved stability and maintains cosmetic properties during storage and use for dyeing, bleaching, and reshaping hair.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oxidizing compositions with high oil content (at least 40%) and low pH (≤5) are formulated for hair treatment, then cosmetic properties and treatment efficacy are improved, but the composition tends to destabilize over time during storage
Solution Approach 1:
The patent introduces phosphoric acid mineral salts as intermediary substances that mediate between the oxidizing agent and the high oil content formulation. These salts act as stabilizing agents that prevent destabilization while maintaining the low pH (≤5) and high oil content (≥40%) necessary for cosmetic efficacy and treatment performance.
Solution Approach 2:
The patent applies parameter changes by specifically controlling the pH to be less than or equal to 5 and incorporating phosphoric acid mineral salts, which alter the chemical parameters of the composition. This parameter optimization resolves the instability issue while preserving the high oil content formulation that provides good cosmetic properties.
2Reliability
If the pH is maintained at low values (≤5) to ensure stability and efficacy, then oxidizing performance is improved, but the composition may become less compatible with certain hair treatments
Solution Approach 1:
Phosphoric acid mineral salts serve as intermediary substances that enable the low pH environment (≤5) necessary for oxidizing efficacy while simultaneously ensuring compatibility with various hair treatments including dyeing, bleaching, and permanent reshaping. The salts buffer the pH and prevent adverse interactions.
Solution Approach 2:
The composition is designed with multi-functionality by incorporating phosphoric acid mineral salts that provide both pH control for oxidizing performance and broad compatibility across different hair treatment types (dyeing, bleaching, reshaping), making the formulation universally applicable.
3Reliability
If phosphoric acid mineral salts are added to stabilize the composition, then storage stability is improved, but the formulation complexity increases
Solution Approach 1:
The patent employs phosphoric acid mineral salts, which are inexpensive and readily available substances that provide effective stabilization. These salts are simple inorganic compounds that add minimal complexity to the formulation while delivering robust storage stability, representing a cost-effective and simple solution.
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 enhanced stability during storage, especially at high temperatures, while maintaining strong, resistant colorations and effective bleaching and reshaping without degrading hair, ensuring good cosmetic properties.
Implementation Method 1
the pH of the composition being less than or equal to 5
Implementation Method 2
compounds capable of producing hydrogen peroxide by hydrolysis, such as urea peroxide
Implementation Method 3
oxidizing compositions are mixed with oxidation dyes (bases and couplers), which are intrinsically colourless, to generate coloured and colouring compounds via a process of oxidative condensation
Implementation Method 4
the —S—S— disulfide bonds of keratin (cystine) are opened using a composition containing a suitable reducing agent (reduction step)
Data Source
AI summary
The present invention relates to an aqueous oxidizing composition for treating keratin fibers, comprising: —at least one oxidizing agent; —at least 40% by weight of at least one oil; —at least one phosphoric acid mineral salt; —the pH of the oxidizing composition being less than or equal to 5. The composition in accordance with the invention may be used for dyeing, bleaching or permanently reshaping keratin fibers. It produces ready-to-use compositions that give good dyeing, bleaching or permanent reshaping properties without degrading the keratin fibers and without impairing their cosmetic properties. Furthermore, the composition in accordance with the invention shows good stability over time, especially to storage at high temperatures, for example of about 45° C.