Hair Lightening Composition Using Silicates and Carbonates
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Solution Overview
Problem
Existing hair lightening compositions, particularly those using persulfates, often result in unsatisfactory lightening with orangey-yellow shades that are not natural and can degrade hair quality, also requiring a two-step process for bleaching and dyeing.
Innovation Solution
A composition comprising hydrogen peroxide as a chemical oxidizing agent, carbonates or bicarbonates, silicates, and esters, amides, or imines, with a limited content of persulfates and a specific ratio of ingredients to achieve efficient and natural hair lightening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If persulfate-based lightening compositions are used, then greater lightening is achieved, but the hair quality is degraded and orangey-yellow shades are obtained
Solution Approach 1:
The patent changes the chemical composition parameters by limiting persulfates to less than 5% and introducing specific silicates (1-40%), carbonates/bicarbonates (0.1-20%), and esters/amides/imines (0.1-30%). This parameter modification achieves effective lightening while reducing fiber degradation and yellowing, resolving the contradiction between lightening effectiveness and hair quality preservation
Solution Approach 2:
The patent creates a composite lightening composition that combines multiple active ingredients (hydrogen peroxide, silicates, carbonates/bicarbonates, esters/amides/imines) in specific proportions. This composite approach synergistically achieves effective lightening while the various components work together to minimize damage and yellowing, addressing both lightening effectiveness and hair quality concerns
2Manufacturing precision
If persulfate-based compositions are used, then lightening is achieved, but compatibility with oxidation dyes and direct dyes is lost
Solution Approach 1:
The patent modifies the chemical composition by severely limiting persulfates to less than 5% and introducing compatible ingredients such as hydrogen peroxide (1-12%), silicates (1-40%), and carbonates/bicarbonates (0.1-20%). These parameter changes create a composition that is chemically compatible with both oxidation dyes and direct dyes, enabling single-step lightening and coloring while maintaining lightening effectiveness
3Manufacturing precision
If a two-step process is used for bleaching and dyeing, then satisfactory colour build-up is achieved, but the process time and complexity increase
Solution Approach 1:
The patent merges the lightening and coloring functions into a single composition by combining lightening agents (hydrogen peroxide, limited persulfates) with dye compatibility enhancers (silicates, carbonates/bicarbonates, esters/amides/imines). This unified composition enables simultaneous lightening and coloring in one step, achieving satisfactory colour build-up while reducing process time and complexity compared to traditional two-step methods
Solution Approach 2:
The patent creates a universal composition that performs multiple functions: lightening (through hydrogen peroxide and limited persulfates), protecting hair quality (through silicates and carbonates/bicarbonates), and enabling dye incorporation (through compatibility enhancers). This multi-functional composition eliminates the need for separate lightening and coloring steps, saving time while maintaining colour build-up quality
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 efficient hair lightening with a more natural result, minimizing hair degradation and allowing for simultaneous bleaching and dyeing in a single step.
Implementation Method 1
The role of this oxidizing agent is to degrade the melanin of the hair, which, depending on the nature of the oxidizing agent present and on the pH conditions, leads to more or less pronounced lightening of the fibres.
Implementation Method 2
i) one or more chemical oxidizing agents chosen from hydrogen peroxide, hydrogen peroxide-generating systems other than peroxygenated salts, and mixtures thereof; ii) one or more compounds chosen from carbonates, carbonate-generating systems, bicarbonates, bicarbonate-generating systems, and mixtures thereof; iii) one or more silicates
Implementation Method 3
ii) one or more compounds chosen from carbonates, carbonate-generating systems, bicarbonates, bicarbonate-generating systems, and mixtures thereof
Implementation Method 4
iv) one or more compounds chosen from esters, amides, imines, and mixtures thereof
Data Source
AI summary
The present invention relates to a composition for lightening keratin fibres, comprising at least one chemical oxidizing agent, at least one (bi)carbonate, at least one silicate and at least one compound chosen from esters and/or amides and/or imines, and to a process for lightening keratin fibres using this composition.