Keratin Fiber Dye Composition with Low Alkalizing Agent
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Solution Overview
Problem
Conventional hair dyeing methods using high concentrations of fatty substances limit the range of color shades that can be achieved, failing to meet user expectations for a full spectrum of colors while also being inconvenient due to the use of alkalizing agents and oxidizing agents.
Innovation Solution
A hair dye composition comprising a mixture of composition A (with alkalizing agents, oxidative dye precursors, surfactants, and fatty substances free of carboxylic acid groups) and composition B (with oxidizing agents and surfactants), where the concentration of fatty substances is at least 20% and alkalizing agents is not more than 1.75% by weight, providing a wider range of color shades and improved dyeing efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a large amount of fatty substances is used in the dyeing formulation, then the unpleasant odour of conventional hair colorant is reduced and alternate alkali materials can be used, but the range of color shades that can be obtained is limited
Solution Approach 1:
The patent changes the concentration parameters of key ingredients: reducing alkalizing agent to 0.1-5%, limiting oxidizing agent to 0.1-5%, and controlling fatty substances at 5-50%. This parameter optimization allows the formulation to maintain low odour while expanding color shade range through improved dye precursor accessibility and reaction efficiency.
Solution Approach 2:
The patent creates a composite formulation integrating multiple functional components: fatty substances for odor control and hair conditioning, optimized concentrations of alkalizing and oxidizing agents for controlled color development, and dye precursors for color formation. This composite approach balances odor reduction with expanded color versatility.
2Manufacturing precision
If conventional hair dyeing formulations with high alkalizing agent and oxidizing agent concentrations are used, then the desired color intensity and permanency can be achieved, but the user experience is compromised due to unpleasant odour and aggressive chemical environment
Solution Approach 1:
The patent fundamentally changes the concentration parameters of aggressive chemicals: alkalizing agent reduced to 0.1-5% and oxidizing agent reduced to 0.1-5%, while maintaining effective color formation through optimized fatty substance content (5-50%) and controlled reaction conditions. This produces gentle yet effective dyeing with minimal odour and improved user comfort.
3Ease of operation
If the concentration of alkalizing agent is reduced to improve user experience, then the pleasantness of usage is enhanced, but the dyeing efficacy and range of color shades may be compromised
Solution Approach 1:
The patent introduces fatty substances as intermediary agents that facilitate the dyeing process even at low alkalizing agent concentrations. These substances improve the penetration and distribution of dye precursors, enabling effective color formation and expanded shade range despite reduced alkalizing agent content, thus maintaining productivity while enhancing user comfort.
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 effectively enhances chromaticity and provides a wider range of color shades on keratin fibers, improving the dyeing process while maintaining a pleasant user experience by optimizing the concentration of fatty substances and alkalizing agents.
Implementation Method 1
oxidative hair dye precursors, which can diffuse into the hair through the cuticle and into the cortex where they then react with each other and a suitable oxidizing agent to form the final dye molecules
Implementation Method 2
at least one surfactant
Data Source
AI summary
An agent for dyeing keratin fibers comprises a composition A comprising at least one alkalizing agent, at least one oxidative dye precursor, at least one surfactant and at least one fatty substance free of carboxylic acid groups and a composition B comprising at least one oxidizing agent and at least one surfactant. The concentration of fatty substances free of carboxylic acid groups after mixing composition A and composition B is at least 20% by weight relative to the total weight of the mixed composition A and B. The concentration of alkalizing agent after mixing composition A and composition B is not more than 1.75% by weight relative to the total weight of the mixed composition A and B.