Two-Part Oxidative Dyeing Composition Stabilized by Xanthine Derivatives
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Hydrogen peroxide-based emulsion compositions for oxidative dyeing of keratin fibers face storage stability issues, particularly at suboptimal temperatures, leading to reduced performance over time.
Innovation Solution
A two-part oxidative dyeing composition comprising a pH 7-12 dyeing composition A with oxidative dye precursors and alkalizing agents, and a pH 1-6 aqueous oxidizing composition B containing hydrogen peroxide and xanthine derivatives, forming an oil-in-water emulsion, which increases storage stability and maintains viscosity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydrogen peroxide emulsion compositions are formulated for oxidative dyeing, then dyeing performance is achieved, but storage stability deteriorates under suboptimal temperature conditions
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition parameters of the emulsion, specifically incorporating xanthine derivatives (caffeine, theophylline, or theobromine) at concentrations of 0.01-1% by weight. This chemical parameter modification stabilizes the emulsion against temperature-induced degradation while preserving dyeing performance, directly resolving the contradiction between reliability and compositional stability.
Solution Approach 2:
The invention creates a composite emulsion system by combining hydrogen peroxide (1-20% by weight) with xanthine derivatives and standard emulsion components (surfactants, co-emulsifiers). This composite formulation synergistically improves storage stability while maintaining the oxidative dyeing function, addressing both aspects of the contradiction simultaneously.
2Ease of operation
If emulsion compositions are stored at room temperature, then accessibility and ease of use are improved, but performance degrades over time
Solution Approach 1:
The xanthine derivatives are incorporated into the emulsion formulation in advance to prevent temperature-induced degradation. This preliminary protective action ensures that the emulsion maintains its stability and performance characteristics during room temperature storage, allowing consumers to store the product conveniently without sacrificing reliability.
Solution Approach 2:
The patent employs xanthine derivatives, which are cost-effective stabilizing agents that extend the functional life of the emulsion at room temperature. This approach makes the product both consumer-friendly for storage and economically viable, resolving the contradiction between ease of operation and reliability.
3Reliability
If xanthine derivatives are added to stabilize the emulsion, then storage stability is improved, but composition complexity increases
Solution Approach 1:
Xanthine derivatives serve as intermediary substances that mediate between the hydrogen peroxide and the emulsion matrix. These compounds act as stabilizing mediators that protect the peroxide from premature decomposition and stabilize the emulsion structure, improving reliability without significantly complicating the overall formulation.
Solution Approach 2:
The patent modifies the formulation by introducing xanthine derivatives at controlled concentrations (0.01-1% by weight), which is a manageable parameter change. This targeted modification improves storage stability while keeping the formulation complexity low, as the xanthine compounds integrate well with standard emulsion ingredients.
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 two-part composition ensures consistent dyeing performance over time, maintains mixability, and enhances storage stability at various temperatures, preventing handling issues and ensuring consistent results.
Implementation Method 1
aqueous hydrogen peroxide-containing compositions are an essential component for effectively dyeing keratin fibers
Implementation Method 2
aqueous oxidizing composition B having a pH in the range of 1 to 6 comprising: a) hydrogen peroxide, and b) one or more compound(s) according to the following structure: wherein R 1 , R 2 , and R 3 are independently selected from H and CH 3 , and/or their mixtures, and c) one or more lipophilic compound, wherein composition B is an oil-in-water emulsion
Data Source
AI summary
The present invention is directed to a two-part oxidative dyeing composition having an alkaline first part comprising oxidative dye coupler(s) and/or oxidative dye precursors, and a second part comprising hydrogen peroxide, xanthine and/or its derivatives, and a lipophilic compound. The second part is formulated as water-in-oil emulsion and it was unexpectedly found that xanthines stabilize the viscosity of the second part composition allowing for improved dyeing performance.