Fatty Alcohol Hair Dye Composition for Uniform Coloration
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Solution Overview
Problem
Existing hair dye compositions face challenges in achieving uniform and intense coloration while maintaining rheological properties, preventing runoff, and ensuring compatibility with keratin fibers, particularly in oxidation dyeing and lightening processes.
Innovation Solution
A composition comprising at least 25% by weight of a mixture of fatty substances, including fatty alcohols solid at ambient temperature, combined with oxidizing agents and optionally basifying agents, applied in a multi-compartment device to ensure localized application and improved mixing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If adjuvants are added to improve dyeing properties, then coloration intensity and uniformity are improved, but rheological properties and application properties are harmed
Solution Approach 1:
The invention changes the chemical composition parameters by incorporating specific fatty substances (fatty alcohols, fatty acids, esters, waxes) in defined proportions (2-50% each) to achieve both improved coloration uniformity and maintained rheological properties, resolving the contradiction between dyeing quality and application performance
Solution Approach 2:
The invention uses composite fatty substance mixtures combining multiple components (fatty alcohols, fatty acids, esters, waxes) with oxidizing agents and dyes to create a composition that simultaneously achieves good dyeing properties, rheological properties, and application characteristics, avoiding the harmful effects of single adjuvants
2Manufacturing precision
If adjuvants are added to improve dyeing properties, then coloration intensity is improved, but composition stability is harmed
Solution Approach 1:
The invention optimizes concentration parameters of fatty substances (2-50% range) to achieve high coloration intensity while maintaining composition stability during storage and application, avoiding the instability caused by conventional adjuvants
3Ease of operation
If composition viscosity is increased to prevent runoff, then application control is improved, but mixing properties are worsened
Solution Approach 1:
The invention adjusts viscosity parameters through controlled addition of fatty substances (2-50%) that provide sufficient thickness for runoff prevention while maintaining low enough viscosity for easy mixing and application, resolving the contradiction between runoff control and mixing ease
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 solution enhances the intensity and uniformity of hair coloration, prevents runoff, and maintains the health of keratin fibers, achieving desired lightening effects while ensuring easy application and mixing.
Implementation Method 1
The role of this oxidizing agent is to break down the melanin of hair, which depending on the nature of the oxidizing agent present, results in a more or less pronounced lightening of the fibres.
Implementation Method 2
The role of this oxidizing agent is to reveal the coloration, via an oxidative condensation reaction between the oxidation dyes.
Data Source
AI summary
The present disclosure relates to compositions for dyeing or lightening human keratin fibers, dyeing or lightening processes using the compositions, and two-compartment or three-compartment devices comprising the compositions, wherein the compositions comprise, in a cosmetically acceptable medium: at least 25% by weight of a mixture of fatty substances comprising at least one fatty alcohol that is solid at ambient temperature; at least one oxidizing agent; and optionally at least one basifying agent.