Color Enhancing Shampoo with Low pH and Carboxylic Acids
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Solution Overview
Problem
Existing color-enhancing and cleansing shampoo compositions do not adequately improve hair shine, softness, manageability, combability, volume, and body while maintaining effective color enhancement and conditioning properties.
Innovation Solution
A shampoo composition comprising at least one cleansing and lathering surfactant, a cationic hair dye, and hydroxycarboxylic or dicarboxylic acid, with a pH adjusted below 4.5, preferably between 2.5 and 4.0, to enhance color enhancement, shine, and hair conditioning effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional color-enhancing shampoo compositions are used, then color enhancement is achieved, but hair shine, softness, and manageability are not adequately improved
Solution Approach 1:
The patent changes the pH parameter to below 4.5 (preferably 2.5-4.0) and incorporates hydroxycarboxylic acids and/or dicarboxylic acids to achieve both enhanced hair shine and maintained color enhancement effectiveness. This parameter modification resolves the contradiction by finding the optimal pH range that benefits both shine and color properties.
Solution Approach 2:
The patent creates a composite formulation combining cationic hair dye, hydroxycarboxylic acid, and dicarboxylic acid in specific concentrations. This composite approach allows the synergistic interaction of multiple components to simultaneously achieve color enhancement and shine improvement, resolving the contradiction between these two functions.
2Ease of operation
If conventional shampoo compositions are used, then cleansing function is provided, but hair conditioning properties (volume, body, combability) are insufficient
Solution Approach 1:
The patent modifies the pH parameter to below 4.5 and incorporates specific conditioning agents in optimized concentrations to improve combability while enhancing hair volume and body. This parameter optimization resolves the contradiction by finding the right chemical environment for both ease of combing and volume enhancement.
3Illumination intensity
If low pH compositions are used to improve shine, then hair shine is enhanced, but potential irritation to scalp and hair may increase
Solution Approach 1:
The patent introduces hydroxycarboxylic acids and/or dicarboxylic acids as intermediary substances that buffer the low pH environment. These intermediaries allow the composition to maintain low pH for shine enhancement while mitigating the harmful effects of high acidity through the buffering capacity of the carboxylic acid components.
Solution Approach 2:
The patent optimizes the pH parameter to a specific range below 4.5 (preferably 2.5-4.0) rather than using extremely low pH values. This optimized parameter change achieves shine enhancement while minimizing irritation potential by avoiding excessively low pH levels that would cause harm.
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 significantly improves hair shine, manageability, and softness, while maintaining excellent combability, volume, and body, with effects becoming more pronounced with repeated use.
Implementation Method 1
The pH of the compositions according to the present invention is suitably below 4.5 and preferably in the range of 2.5 to 4.0, more preferably 2.9 to 3.8. The pH of the compositions is adjusted with hydroxycarboxilic acids and/or dicarboxylic acids.
Implementation Method 2
Such shampoo compositions customarily comprise hair coloring direct dyestuffs together with the at least one surface-active substance, in particular an anionic surfactant, and a hair-conditioning polymer
Implementation Method 3
at least one cleansing and lathering surfactant
Data Source
AI summary
The present invention concerns a shampoo composition with color enhancing effect and showing optimum hair conditioning properties, especially shine, softness and good manageability. Composition comprises at least one cleansing and lathering surfactant, at least one cationic hair dye and at least one hydroxycarboxylic acid and/or dicarboxylic acid.