Keratin Fiber Dye Composition for Low-Odor Ammonia Processing
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Solution Overview
Problem
Existing hair dye compositions using ammonia for permanent hair coloring result in an unpleasant odor and can cause hair damage, while reducing ammonia content leads to poorer dye penetration and gray coverage.
Innovation Solution
A dyeing composition for keratin fibers comprising anionic and cationic surfactants, alkoxylated and C6-C24 fatty alcohols, and oxidation dyes with limited alkanolamines, using ammonia as the sole alkalizing agent to minimize odor and enhance color processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ammonia is used as the alkalizing agent in permanent hair dyeing compositions, then dye penetration and gray coverage are improved, but unpleasant odor and hair damage occur
Solution Approach 1:
The patent changes the chemical parameters of the alkalizing agent by using a mixture of alkanolamines (diethanolamine, triethanolamine, isopropanolamine) instead of ammonia, while adjusting their concentrations to achieve the desired pH level. This parameter substitution maintains the necessary alkalinity for dye penetration and gray coverage while eliminating the harmful odor and reducing hair damage associated with ammonia.
Solution Approach 2:
The patent introduces an intermediary substance - a mixture of alkanolamines - that serves as an alternative alkalizing agent. These alkanolamines act as mediators that provide the necessary pH adjustment and dye penetration facilitation without the harmful properties of ammonia, thus resolving the contradiction between effective dyeing performance and harmful effects.
2Object-affected harmful factors
If ammonia content is reduced to minimize odor and hair damage, then harmful effects are decreased, but dye penetration and gray coverage deteriorate
Solution Approach 1:
The patent changes the chemical parameters by substituting ammonia with alkanolamines and adjusting their concentrations to maintain the necessary pH level for effective dyeing. This parameter change allows reducing harmful ammonia content while preserving the functional properties needed for dye penetration and gray coverage through the alternative alkalizing agents.
Solution Approach 2:
The patent creates a functional copy of ammonia's role as an alkalizing agent using alkanolamine mixtures. These alkanolamines replicate the pH-adjusting and penetration-aiding functions of ammonia without possessing the harmful odor and damage properties, thus maintaining effectiveness while eliminating harm.
3Productivity
If conventional hair dyeing compositions are used, then color processing is achieved, but hair damage and unpleasant odor are caused
Solution Approach 1:
The patent changes the chemical composition parameters by replacing ammonia with a specific mixture of alkanolamines (diethanolamine, triethanolamine, isopropanolamine) at controlled concentrations. This parameter modification maintains the necessary alkalinity for effective color processing while eliminating the harmful odor and reducing hair damage associated with conventional ammonia-based formulations.
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 reduces ammonia odor and hair damage while maintaining effective dye penetration and gray coverage, offering faster color processing and improved hair health.
Implementation Method 1
They contain colourless precursors which will react with the oxidizing agent inside the hair fibre to produce coloured molecules
Implementation Method 2
Ammonia is the alkalizing agent of choice today for adjusting these pH values. Not only can the pH range necessary for dye formation be adjusted with ammonia, but ammonia also causes the swelling of hair to a greater degree than all other known alkalizing agents. At the same time, ammonia acts as a penetration agent or penetration aid
Implementation Method 3
said dyeing compositions comprise, in a cosmetically acceptable medium, based on the total weight of the composition: (a) at least one anionic surfactant, (b) at least one cationic surfactant; (c) at least one alkoxylated C6-C24 fatty alcohol; (d) at least one C6-C24 fatty alcohol
Data Source
AI summary
Compositions for dyeing keratin fibers are described. These dyeing compositions comprise, in a cosmetically acceptable medium, based on the total weight of the composition: (a) at least one anionic surfactant, (b) at least one cationic surfactant; (c) at least one alkoxylated C6-C24 fatty alcohol; (d) at least one C6-C24 fatty alcohol; (e) at least one oxidation dye, (f) about 0.1-10 wt. % of ammonia; wherein the compositions do not comprise more than 2 wt. % of alkanolamines, C1-C4 alkyl alkanolamines, or any fatty acid salt thereof, or mixtures thereof. These dyeing compositions present reduced ammonia odor and, at the same time, a faster color processing. A process for preparing these compositions, a process for permanent dyeing keratin fibers using these compositions and a packaging kit containing these compositions are also described.