Cold Oxidative Hair Bleaching Agent Viscosity Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing oxidative hair lightening and coloring agents face challenges in stability during storage, reaction acceleration, and viscosity maintenance, especially when exposed to higher electrolyte concentrations and high-melting fat components, which can lead to destabilization and reduced application performance.
Innovation Solution
A process involving a hair lightening or coloring agent comprising 70-90% water, a crosslinked copolymer of acrylic acid, an alkalizing agent, and sodium polyacrylate, mixed with an oxidizing agent preparation containing hydrogen peroxide, to create a stable and efficient hair treatment with optimal viscosity and pH for application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If high-melting-point fatty components are used to create cream consistency, then the carrier shows sharp drop in viscosity after dilution, but the application performance is reduced
Solution Approach 1:
The patent changes the chemical composition parameters of the carrier by replacing high-melting-point fatty components with specific polymers (polyacrylates, polyvinylpyrrolidone) and surfactants. This substitution maintains cream consistency through different mechanisms (polymer network formation instead of fatty crystal structures) while preventing the sharp viscosity drop upon dilution, thus resolving the contradiction between cream consistency and application performance
Solution Approach 2:
The patent creates a composite carrier system combining multiple polymers (polyacrylates with polyvinylpyrrolidone), surfactants, and electrolytes in specific ratios. This composite approach provides both cream consistency and stable viscosity after dilution, eliminating the need for high-melting-point fatty components while achieving superior application performance
2Reliability
If electrolyte concentration is increased to stabilize dye precursors, then the carrier destabilizes, but the dye precursor stability is compromised
Solution Approach 1:
The patent optimizes the electrolyte concentration parameter to a specific range (0.5-3.0 wt%) rather than using high concentrations. This controlled parameter adjustment maintains sufficient dye precursor stability while preventing carrier destabilization, resolving the contradiction between dye precursor stability and carrier stability
Solution Approach 2:
The patent introduces specific polymers (polyacrylates and polyvinylpyrrolidone) as intermediary substances that mediate between the electrolyte and the carrier system. These intermediaries allow the presence of electrolytes needed for dye precursor stability without causing carrier destabilization, thus resolving the contradiction
3Productivity
If alkaline pH is used to stabilize dye precursors and accelerate reaction, then the hair damage increases, but the coloring efficiency is improved
Solution Approach 1:
The patent adjusts the pH parameter to a controlled alkaline range (8.0-9.5) rather than using highly alkaline conditions. This optimized pH level maintains sufficient reaction acceleration and coloring efficiency while reducing hair damage, resolving the contradiction between coloring efficiency and hair damage
Solution Approach 2:
The patent creates a locally optimized environment at the hair surface through the carrier formulation, where the pH is sufficiently alkaline to accelerate the oxidative reaction and stabilize dye precursors, but the overall system maintains conditions that minimize hair damage through the protective polymer and surfactant matrix
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 provides a stable, easy-to-mix, and creamy hair lightening or coloring agent with improved tolerance to electrolyte concentrations, maintaining optimal viscosity and application properties, ensuring effective and long-lasting results.
Implementation Method 1
To lighten the hair by oxidatively breaking down the natural hair pigment melanin
Implementation Method 2
Under the influence of oxidizing agents or atmospheric oxygen, the developers react with each other or with one or more couplers to form the actual dyes
Data Source
AI summary
The present invention provides compositions for oxidative hair lightening or hair coloring containing 70-90% by weight of water, alkalizing agents, optionally a color-giving substance and a particular mixture of a crosslinked copolymer of acrylic acid and non-ethoxylated esters of acrylic acid with linear C10-C30-monoalcohols, anionic surfactant and linear, saturated C8-C22-alkan-1-ol and sodium polyacrylate, which endows the lightening or coloring composition with a performance-optimal viscosity and the consistency of a gel-like creme with exceptional haptics.