Silicone-Based Hair Dye Composition for Shampoo-Resistant Coloring
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Solution Overview
Problem
Current hair dye methods, particularly temporary dyeing using pigments, suffer from poor resistance to shampoo washing and external factors like sebum and perspiration, and require high heat for application, making them complex and difficult to remove effectively.
Innovation Solution
A composition comprising at least one silicone of formula (I) and one silicone of formula (II), along with a coloring agent, applied in a method involving two steps: first applying a metallic compound and then the silicone-based composition, which provides a persistent, uniform color without excessive heat and allows for easy removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pigment-based temporary dyeing is used, then visible coloring on dark hair is achieved, but resistance to shampoo washing and external agents is poor
Solution Approach 1:
The patent uses a composite system combining silicone polymers with pigment particles. The silicone acts as a binder matrix that holds the pigment on the hair surface, creating a composite material that provides both coloration and resistance to washing. This resolves the contradiction by integrating multiple materials to achieve both durability and ease of application.
Solution Approach 2:
The silicone polymer serves as an intermediary between the pigment and the hair surface. It facilitates adhesion of the pigment to the hair while maintaining ease of application, and simultaneously provides the resistant coating that protects the pigment from being washed away. This mediator resolves the contradiction between durability and ease of manufacture.
2Reliability
If high heat is applied to accelerate colored coating formation, then persistence against shampoo washing and external agents is improved, but application complexity increases
Solution Approach 1:
The patent replaces the thermal field (heat treatment) with a chemical field approach. Instead of using heat to accelerate coating formation, the invention uses silicone polymers that form the colored coating at ambient or moderate temperatures through their inherent adhesive and film-forming properties. This substitution eliminates the need for complex heating devices while maintaining coating persistence.
Solution Approach 2:
The invention changes the temperature parameter from high heat treatment to ambient or moderate temperature application. By formulating the dyeing composition with silicone-based materials that can polymerize or form films at lower temperatures, the patent achieves persistent coloring without requiring complex heating equipment, thus resolving the contradiction between persistence and device complexity.
3Reliability
If colored coating is made persistent with respect to shampoo washing, then resistance to external agents is improved, but ease of removal becomes difficult
Solution Approach 1:
The silicone-based colored coating is designed to be temporarily adherent during use but removable when needed. The coating can be discarded (removed) using standard shampooing or makeup-removing compositions when the user wants to change the color or remove the temporary dye. This principle allows the coating to provide resistance during its functional period while remaining easily removable when desired, resolving the contradiction between persistence and ease of removal.
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 solution achieves a persistent, uniform color on hair resistant to shampoo washing and external factors without the need for high heat, and allows for easy removal, addressing the limitations of existing temporary dyeing methods.
Implementation Method 1
The composition according to the invention comprises at least one silicone of formula (I)... at least one silicone of formula (II)... and at least one coloring agent
Data Source
AI summary
The present invention relates to a composition for treating keratin fibers such as the hair, comprising at least one silicone of formula (I), at least one silicone of formula (II) and at least one coloring agent chosen from pigments, direct dyes and mixtures thereof.