Amphiphilic Cellulose Dye Composition for Keratin Fiber Color Homogeneity
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Solution Overview
Problem
Conventional dye compositions for keratin fibers often result in less favorable dyeing performance, with reduced color intensity, homogeneity, and cosmetic properties due to high raw material content, leading to less satisfactory results in terms of shade kinetics and fiber treatment.
Innovation Solution
A dye composition comprising at least one dye, nonionic or anionic surfactants, amphiphilic cellulose, and cationic associative polymers, with a water content of 40% or more by weight, designed for keratin fiber dyeing, either alone or in combination with an oxidizing agent, to enhance color intensity and homogeneity while maintaining ease of application and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the dye composition contains large quantities of raw materials (fatty substances, surfactants, polymers), then the composition exhibits good spreading properties and texture for easy application, but the dyeing performance deteriorates with reduced color intensity and homogeneity
Solution Approach 1:
The patent changes the chemical parameters of the composition by specifying precise concentration ranges for each component (surfactant: 0.01-50%, polymer: 0.01-5%, cellulose derivative: 0.01-5%, dye: 0.0005-15%) and adjusting the water content to 40% or more. This parameter optimization resolves the contradiction by finding the precise balance point where sufficient raw materials provide good application properties while excessive amounts that would harm color homogeneity are eliminated.
2Ease of operation
If the dye composition is formulated to be thick and sufficient to not run outside target areas, then application control is improved, but dyeing performance is reduced with less favorable kinetics and color intensity
Solution Approach 1:
The patent creates a composite material system combining four key components: surfactants (for wetting and spreading), polymers (for viscosity and thickening), cellulose derivatives (for texture and stability), and dyes (for coloration). This composite approach allows the composition to simultaneously achieve thick consistency for application control and maintained dyeing kinetics by ensuring each component is present at optimized concentrations that prevent interference with the dyeing process.
3Stability of the object's composition
If the composition remains stable during leave-in time on fibers, then cosmetic properties are maintained, but dyeing performance is reduced with less satisfactory color intensity
Solution Approach 1:
The patent ensures continuous useful action by formulating a composition that maintains stability throughout the entire leave-in time period without compromising dyeing performance. The surfactant-polymer-cellulose-dye system is designed to remain chemically stable and physically uniform during the application and waiting periods, while the optimized concentrations ensure that the dye remains active and ready to penetrate the fiber, thus maintaining both stability and color intensity throughout the process.
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 more intense, homogeneous colors with improved cosmetic properties for keratin fibers, reducing deterioration and ensuring easy application and removal without running, thus addressing the limitations of existing dye compositions.
Implementation Method 1
at least one amphiphilic cellulose, at least one cationic associative polymer
Implementation Method 2
at least one surfactant chosen from nonionic surfactants and anionic surfactants
Implementation Method 3
When they are exposed to an oxidizing agent, these compounds produce, through a process of oxidative condensation taking place inside the fiber, colored substances
Data Source
AI summary
Disclosed herein is a dye composition comprising water in an amount greater than or equal to 40% by weight, relative to the total weight of the composition, and a process for dyeing keratin fibers, for example, human keratin fibers, using such a composition. This dye composition additionally comprise at least one dye chosen from oxidation dye precursors and direct dyes; at least one surfactant chosen from nonionic surfactants and anionic surfactants; at least one nonionic cellulose modified with at least one group comprising saturated and unsaturated, linear and branched C6-C30 hydrocarbon chains, and at least one cationic associative polymer. Also disclosed herein is a multi-compartment device or kit separately comprising the dye composition and an oxidizing composition.