Hair Dyeing Process Using Titanium Salts and Insoluble Silicates
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Solution Overview
Problem
Current dyeing processes for keratin fibers, such as hair, face challenges in achieving powerful, persistent, and homogeneous color results that withstand external agents like light, weather, shampooing, and sweat, while being gentle on the hair and requiring smaller amounts of dyes.
Innovation Solution
A process using cosmetic compositions containing oxidation dyes or direct dyes, titanium salts, insoluble silicates, and optional chemical oxidizing agents, specifically designed to enhance dye deposition and resistance on keratin fibers, with a focus on natural ortho-diphenol-based dyes for improved performance and reduced hair fiber interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oxidation dyes are used to achieve permanent colorings, then color persistence and resistance to external agents are improved, but dye content and leave-on time must be increased which affects productivity and ease of operation
Solution Approach 1:
The patent introduces titanium salts as intermediary substances that mediate between the oxidation dyes and keratin fibers. The titanium salts form complexes with the oxidation dyes, enhancing their affinity for keratin and improving dye deposition efficiency. This intermediary mechanism allows for better color persistence with reduced dye content and shorter leave-on times, directly resolving the contradiction between reliability and productivity.
Solution Approach 2:
The invention creates a composite system combining oxidation dyes, titanium salts, and insoluble silicates. This composite formulation synergistically enhances dyeing performance: the titanium salts improve dye-Keratin interactions while the insoluble silicates provide structural support and additional binding sites. The composite approach achieves superior color persistence and resistance to external agents while maintaining high dyeing efficiency with lower dye concentrations.
2Illumination intensity
If direct dyes are used to achieve chromatic colorings, then color intensity is improved, but persistence against washing and light is worsened
Solution Approach 1:
The patent employs titanium salts as intermediary agents that bridge direct dyes and keratin fibers. The titanium salts form stable complexes with direct dyes, enhancing their binding affinity to keratin. This intermediary mechanism transforms the weak physisorption of direct dyes into stronger chemisorption through titanium coordination, significantly improving persistence against washing and light while maintaining the chromatic intensity characteristic of direct dyes.
3Object-affected harmful factors
If natural dyes are used to respect hair nature, then gentleness is improved, but color persistence and intensity are worsened
Solution Approach 1:
The patent introduces titanium salts and insoluble silicates as intermediary substances that enhance the performance of natural dyes. These intermediaries form complexes with natural dye molecules, increasing their affinity for keratin and improving color persistence. The insoluble silicates provide additional binding sites and structural support, allowing natural dyes to achieve enhanced durability without compromising their gentleness to hair. This approach resolves the contradiction by using intermediaries to amplify natural dye effectiveness.
4Strength
If higher dye contents are used to improve build-up, then color strength is improved, but staining of scalp and clothing increases which affects ease of operation
Solution Approach 1:
The patent employs titanium salts and insoluble silicates as intermediary substances that enhance dye deposition efficiency. These intermediaries form complexes with oxidation dyes that have high affinity for keratin, enabling better color build-up at lower dye concentrations. The enhanced binding mechanism reduces dye leakage and staining of scalp and clothing while maintaining strong, persistent color. This intermediary approach resolves the contradiction by improving deposition efficiency rather than increasing dye content.
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 process achieves persistent, resistant, and homogeneous color results on keratin fibers, with improved build-up and strength, maintaining color integrity against washing, perspiration, and light exposure without compromising hair health.
Implementation Method 1
cosmetic compositions comprising a) one or more dye(s), b) one or more titanium salts and b1) optionally one or more particular carboxylic acids, c) one or more insoluble silicates
Implementation Method 2
the titanium salt comprises a Ti of oxidation state 2, 3 or 4, denoted Ti(II), Ti(III) or Ti(IV), preferably Ti(IV)
Implementation Method 3
when combined with oxidizing products, may give rise to coloured compounds via a process of oxidative condensation
Implementation Method 4
which, when combined with oxidizing products, may give rise to coloured compounds via a process of oxidative condensation
Implementation Method 5
one or more insoluble silicates
Data Source
AI summary
The present invention relates to a process for dyeing keratin fibres, in particular human keratin fibres such as the hair, in which said fibres are treated using one or more cosmetic compositions comprising a) one or more dye(s), b) one or more titanium salts and optionally b1) at least one carboxylic acid, and c) one or more insoluble silicates and d) optionally one or more chemical oxidizing agents such as hydrogen peroxide or one or more hydrogen peroxide-generating systems.