Two-Part Bleaching Composition with Xanthine Stabilizer
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Solution Overview
Problem
Hydrogen peroxide-containing bleaching compositions for keratin fibers face issues with storage stability, especially under suboptimal temperature conditions, leading to reduced performance over time.
Innovation Solution
A two-part bleaching composition comprising a bleaching powder composition with persalts and alkalizing agents, and an aqueous oxidizing composition with hydrogen peroxide and xanthine derivatives, which forms an oil-in-water emulsion, maintaining stability and viscosity, and is mixed to create a ready-to-use solution for bleaching keratin fibers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydrogen peroxide compositions are formulated as emulsions for cosmetic use, then they provide effective bleaching performance, but storage stability deteriorates under suboptimal temperature conditions
Solution Approach 1:
The composition is divided into two separate parts: Part A containing the oxidizing agent (hydrogen peroxide) and Part B containing the stabilizing agents (xanthine derivative and lipophilic compound). This segmentation prevents premature reactions and maintains stability during storage, while allowing effective bleaching when mixed. The patent explicitly states this is a two-part composition where Part A and Part B are mixed prior to application.
Solution Approach 2:
The xanthine derivative acts as an intermediary stabilizing agent that protects the hydrogen peroxide from degradation. The lipophilic compound serves as another intermediary that enhances stability and prevents unwanted reactions. These intermediaries allow the composition to maintain reliability without requiring overly complex formulation systems.
2Duration of action of stationary object
If hydrogen peroxide compositions are stored at room temperature for long periods, then shelf life is extended, but performance deteriorates due to reduced stability
Solution Approach 1:
The stabilizing agents (xanthine derivative and lipophilic compound) are incorporated into the composition in advance to prevent degradation before use. This preliminary protective action ensures that the hydrogen peroxide remains stable throughout the shelf life period, maintaining consistent performance from the first use to the last use within the shelf life period.
Solution Approach 2:
The patent modifies the chemical parameters of the composition by introducing xanthine derivatives and lipophilic compounds that change the stability characteristics of hydrogen peroxide. These parameter changes allow the composition to maintain its oxidizing power and bleaching performance over extended storage periods at room temperature without significant degradation.
3Reliability
If the composition is made more stable through additional ingredients, then storage reliability improves, but the number of components and handling complexity increases
Solution Approach 1:
The composition is provided in two separate parts (Part A and Part B) that are simple to handle individually. Part A contains the oxidizing agent and Part B contains the stabilizing agents. This segmentation makes each part simple to store and handle, while the stability benefit is achieved when they are combined according to the simple instruction of mixing them together prior to application.
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 bleaching performance and improved storage stability, maintaining mixability and reducing handling issues, while maintaining the original performance of hydrogen peroxide bleaching processes.
Implementation Method 1
aqueous, hydrogen peroxide-containing compositions are an essential component for effectively bleaching keratin fibers
Implementation Method 2
an 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 composition B is an oil-in-water emulsion
Data Source
AI summary
The present invention is directed to a two-part bleaching composition having a first bleaching powder composition and a second aqueous oxidizing composition. The second composition comprises xanthine and/or its derivatives.