Hair-Dyeing Composition Using Cationic Polymers for Color Retention
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Solution Overview
Problem
Existing hair dyes, particularly semi-permanent and temporary dyes, suffer from low color development, color retention, and damage to the hair and scalp, while using metal salts for enhancement leads to a negative tactile effect, and polymers do not provide sufficient improvement.
Innovation Solution
A hair cosmetic composition comprising a basic dye, cationic polymer compounds, amphoteric or cationic surfactants, a hair penetrating solvent, Terminalia chebula fruit extract, and basic amino acids, which enhance color development and retention without using metal salts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If metal salts are used to enhance color development, then color development is improved, but the composition has a negative effect on the sense of touch when used
Solution Approach 1:
The patent removes metal salts from the composition entirely and replaces them with alternative color enhancement mechanisms using basic dyes combined with cationic polymers and surfactants, thereby eliminating the negative tactile effects while maintaining color development benefits
Solution Approach 2:
The patent introduces cationic polymer compounds and surfactants as intermediary substances that facilitate color deposition and enhancement without the harmful effects of metal salts, acting as mediators between the basic dyes and hair
2Object-affected harmful factors
If semi-permanent hair dyes are used, then damage and allergies are avoided, but color development is lower compared to oxidative hair dyes
Solution Approach 1:
The patent changes the chemical parameters of semi-permanent dyes by combining basic dyes with cationic polymers and surfactants, thereby enhancing color development and penetration without converting to oxidative chemistry that causes damage
Solution Approach 2:
The patent creates a composite coloring system combining basic dyes with cationic polymer compounds and surfactants, where the synergistic interaction between components enhances color development while maintaining the safety profile of non-oxidative dyes
3Illumination intensity
If polymers are used to enhance color development, then some improvement is achieved, but basic dyes do not have sufficient improvement effects
Solution Approach 1:
The patent merges multiple functional components - basic dyes, cationic polymer compounds, and surfactants - into a unified composition where each component contributes to color development, achieving sufficient improvement that neither component alone could provide
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 improves color development, retention, tensile strength, gloss, and friction coefficient of the hair, while maintaining a pleasant tactile experience.
Implementation Method 1
These semi-permanent hair dyes use dye to develop color
Implementation Method 2
an amphoteric surfactant or a cationic surfactant
Implementation Method 3
a hair penetrating solvent
Implementation Method 4
Terminalia chebula fruit extract
Data Source
AI summary
The present invention relates to a hair cosmetic composition that assists in applying color to hair or maintaining the color of dyed hair. The hair cosmetic composition according to the present invention uses a cationic polymer compound having a specific structure, an amphoteric surfactant or a cationic surfactant, and a hair penetrating solvent, and thus can improve the color development and color retention of dyes compared to existing hair cosmetic compositions. In addition, through the synergistic effect of a combination of Terminalia chebula fruit extract and a basic amino acid, the hair color development can be increased, and the tensile strength, gloss, and friction coefficient of the hair can be remarkably improved.