Water-Free Bleaching Composition Using Gluconic Acid Chelation
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Solution Overview
Problem
Existing hair bleaching compositions cause significant damage and irritation, especially with repeated use, due to their strong oxidative activity.
Innovation Solution
A substantially water-free bleaching composition comprising at least one bleaching compound, such as persulfates, and a specific chelating agent like gluconic acid or its salts, which effectively reduces hair damage while maintaining bleaching efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If higher concentrations of peroxide or peroxide releasing compounds are used for effective bleaching, then bleaching efficacy is improved, but hair damage and scalp irritation increase
Solution Approach 1:
Gluconic acid and its salts act as intermediary substances that moderate the interaction between peroxide compounds and hair keratin. The chelating agent binds metal ions that would otherwise catalyze excessive oxidation, thereby maintaining effective bleaching while reducing harmful oxidative damage to hair structure and scalp tissues.
Solution Approach 2:
The invention changes the chemical environment parameters by introducing gluconic acid, which alters the pH and metal ion availability in the bleaching composition. This parameter modification allows the system to achieve effective bleaching at controlled oxidation rates, reducing damage while maintaining efficacy.
2Adaptability or versatility
If repeated bleaching processes are performed to achieve desired hair color, then coloring goal is achieved, but cumulative hair damage leads to ultimate hair loss
Solution Approach 1:
Gluconic acid provides beforehand cushioning by pre-binding metal ions and moderating oxidative potential before the bleaching action occurs. This protective mechanism is present from the start of each bleaching process, cushioning against cumulative damage that would otherwise lead to hair loss with repeated applications.
3Ease of operation
If powder compositions are used for bleaching, then application is convenient, but dustiness causes irritation and handling difficulties
Solution Approach 1:
The invention encapsulates the bleaching agents in granular forms with binding agents that create a cohesive structure, effectively creating a protective shell around the active ingredients. This shell structure maintains the convenience of powder application while eliminating dust generation and associated irritation problems.
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 effectively bleaches hair with reduced damage, allowing for repeated bleaching processes without causing ultimate hair loss.
Implementation Method 1
a specific chelating agent like gluconic acid or its salts
Implementation Method 2
oxidative decomposition of hair colour, which is usually done using peroxide or peroxide releasing compounds
Data Source
AI summary
A substantially water free bleaching and/or highlighting composition for keratin fibres, especially human hair, comprising at least one compound with bleaching and/or highlighting effect and a polyhydroxy carboxylic acid and/or its salt as a chelating agent. Suitable and most preferred is gluconic acid and its salts especially mono valent cation salts such as sodium, potassium and ammonium salts. The composition can effectively bleach hair but cause less damage. Suitable compounds with bleaching and/or highlighting effect are sodium persulfate, potassium persulfate and ammonium persulfate. The composition may form part of a kit with an aqueous composition comprising an oxidising agent such as hydrogen peroxide and optionally a third composition comprising conditioning agent and/or direct dye.