Odor-Reducing Soap-Based Gel Developer for Oxidation Dyes
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Solution Overview
Problem
Existing hair dyeing and brightening compositions using ammonia as an alkalizing agent face challenges in reducing ammonia release and odor, which can cause damage to hair and limit the absorption of dyes, while alternatives like monoethanolamine require more hydrogen peroxide and longer application times to achieve similar results.
Innovation Solution
A soap-based gel oxidizing composition containing hydrogen peroxide, selected 1-alkanols, glyceryl fatty acid esters, ethoxylated fatty alcohols, and polyols, which reduces ammonia odor and maintains effective dye absorption and hair color change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ammonia is used as an alkalizing agent in hair dyeing compositions, then effective dye absorption and hair color change are achieved, but ammonia release and odor increase causing hair damage
Solution Approach 1:
The patent changes the chemical parameter by substituting ammonia with monoethanolamine as the alkalizing agent. This substitution reduces ammonia release and odor while maintaining the necessary pH level (8-11.5) for effective dye absorption and hair color change, thus resolving the contradiction between effectiveness and harmful emissions
Solution Approach 2:
The patent introduces hydrogen peroxide as an intermediary oxidizing agent that enables the alternative alkalizing agent (monoethanolamine) to achieve the same dye absorption effectiveness as ammonia. The hydrogen peroxide system allows the use of less harmful alkalizing agents while maintaining the oxidation necessary for permanent hair coloring
2Object-generated harmful factors
If alternatives to ammonia like monoethanolamine are used, then ammonia release and odor are reduced, but more hydrogen peroxide and longer application times are required
Solution Approach 1:
The patent optimizes the concentration parameters of hydrogen peroxide (5-20% by weight) and monoethanolamine (0.5-20% by weight) to achieve a balance where reduced ammonia emissions do not require excessive amounts of hydrogen peroxide. The formulated composition achieves effective hair coloring with moderate hydrogen peroxide levels and extended application time (5-60 minutes)
3Object-generated harmful factors
If alternatives to ammonia like monoethanolamine are used, then ammonia release and odor are reduced, but application time increases
Solution Approach 1:
The patent adjusts the pH parameter (maintaining 8-11.5) and concentration parameters of the alkalizing agent and oxidizing agent to optimize the reaction kinetics. This allows the use of alternative alkalizing agents with reduced ammonia odor while keeping the application time within a practical range (5-60 minutes) for effective hair coloring
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 provides a stable, reduced-ammonia release hair treatment that effectively changes hair color with improved hair health and dye absorption, compared to traditional ammonia-based methods.
Implementation Method 1
Since melanin dye of the fibers is destroyed to a certain extent during the treatment of keratinic fibers, especially hair, with oxidizing agents, in particular with hydrogen peroxide, the fibers/hair inevitably is brightened, that is, the color thereof is changed
Implementation Method 2
the soap-gel based hair brightening and/or hair dyeing preparations contain ammonia or ammonium hydroxide as alkalizing agent and have a pH ranging from about 8 to about 11.5
Data Source
AI summary
The aim of the present disclosure was to provide an improved oxidizing agent preparation for oxidative color modifying agents, which are present as soap based gels and contain ammonia as the alkalizing agent and optionally at least one oxidation dye precursor, and have a pH in the range of from 8 to 11.5, measured at 20° C., with which homogeneous and viscosity-stable application mixtures can be produced that release less ammonia during the entire leave-in time. It was surprisingly found that aqueous hydrogen peroxide preparations which contain selected 1-alkanols, glyceryl fatty acid esters, ethoxylated fatty alcohols, polyols and oils, achieve said aim in a very satisfactory manner.