Dye Composition Surfactant Ratio for Keratin Fiber Color Homogeneity
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Solution Overview
Problem
Conventional dye compositions for keratin fibers often suffer from issues such as reduced dyeing quality, uneven color intensity, and homogeneity due to high concentrations of starting materials, leading to less favorable kinetics and poorer cosmetic outcomes.
Innovation Solution
A dye composition comprising at least 40% water by weight, including nonionic and anionic surfactants, hydroxyethylcellulose, cationic associative polymers, and fatty substances, with a surfactant-to-fatty substance weight ratio greater than 1.75, optimized for improved texture and stability during application and rinsing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If high concentrations of starting materials (fatty substances, surfactants, polymers) are used in dye compositions, then spreading properties and texture for easy application are improved, but dyeing quality deteriorates with less favorable kinetics and reduced color intensity
Solution Approach 1:
The patent applies parameter changes by precisely controlling the weight ratio of surfactants to fatty substances (greater than 1.75) and adjusting the water content (at least 40% by weight). This optimization balances the composition to maintain good spreading properties and application ease while improving dyeing quality, color intensity, and homogeneity, thereby resolving the contradiction between ease of operation and manufacturing precision.
2Stability of the object's composition
If large amounts of starting materials are used to ensure stability during leave-on time, then cosmetic properties are maintained, but dyeing performance deteriorates with poorer homogeneity and reduced color intensity
Solution Approach 1:
The patent optimizes the composition parameters by setting the surfactant-to-fatty substance weight ratio greater than 1.75 and water content at least 40% by weight. This parameter optimization ensures composition stability during the leave-on time while simultaneously improving color homogeneity and intensity, resolving the contradiction between stability and manufacturing precision.
3Ease of operation
If high concentrations of fatty substances and surfactants are used to achieve good texture and spreading properties, then application properties are improved, but dyeing kinetics become less favorable
Solution Approach 1:
The patent applies parameter changes by optimizing the surfactant-to-fatty substance weight ratio (greater than 1.75) and water content (at least 40% by weight). This optimization maintains excellent spreading properties and texture for easy application while improving dyeing kinetics and color formation speed, thereby resolving the contradiction between ease of operation and productivity.
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 stronger, more homogeneous colorations while maintaining good cosmetic properties and easy application and removal, enhancing the overall dyeing process for keratin fibers.
Implementation Method 1
When they are placed in contact with an oxidizing agent, these compounds produce, via a process of oxidative condensation taking place within the fiber itself, colored substances that remain trapped in the fibers.
Data Source
AI summary
The present disclosure relates to a dye composition comprising water in an amount of at least 40% by weight, relative to the total weight of the dye composition. The present disclosure also relates to a process for dyeing keratin fibers, such as human keratin fibers, using the dye composition as disclosed herein. The dye composition also comprises at least one dye chosen from oxidation dye precursors and direct dyes; at least one surfactant chosen from nonionic and anionic surfactants; at least one hydroxyethylcelluloses; at least one fatty substance; wherein the weight ratio of the total amount of surfactants to the total amount of the at least one fatty substance is greater than or equal to 1.75; and also comprising at least one cationic associative polymer. The present disclosure also relates to a multi-compartment kit comprising a first compartment comprising at least one dye composition as disclosed herein, and a second compartment comprising at least one, oxidizing composition.