Hair Decolorization Using Low-pH Amphoteric Surfactants
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hair coloring methods using amino-functionalized silicone polymers and pigments result in long-lasting color but are difficult to remove completely, leading to patchy or uneven color results and potential hair damage.
Innovation Solution
A decolorizing agent containing amphoteric and/or zwitterionic surfactants with a pH value of 1.0 to 4.3 is applied to keratin materials colored with amino-functionalized silicone polymers and pigments, then rinsed off to achieve complete and uniform color removal without damaging the hair.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If amino-functionalized silicone polymers and pigments are used for hair coloring, then color durability is improved, but color removal difficulty increases
Solution Approach 1:
The patent applies parameter changes by adjusting the pH of the decolorizing agent to a specific range (2.0-4.0) and selecting surfactants with specific amphoteric/zwitterionic properties. These parameter changes enable the decolorizing agent to effectively remove the colored film formed by amino-functionalized silicone polymers and pigments, resolving the contradiction between color durability and color removal difficulty.
2Duration of action of stationary object
If oxidative dyes are used for long-lasting color, then color durability is improved, but hair damage increases
Solution Approach 1:
The patent employs a temporary coloring system using pigments and amino-functionalized silicone polymers that can be easily removed, replacing the need for permanent oxidative dyes. This disposable coloring approach provides long-lasting color during the desired period but can be completely washed off without causing hair damage, thus resolving the contradiction between color durability and hair damage.
3Ease of operation
If direct dyes are used for coloring, then application simplicity is improved, but color durability worsens
Solution Approach 1:
The patent creates a composite coloring system by combining pigments with amino-functionalized silicone polymers. This composite material maintains the simple application process of direct dyes while significantly improving color durability through the adhesive properties of the amino-functionalized silicone polymer that binds the pigment to the hair fiber.
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 decolorizing agent effectively removes the colored film on keratin materials, ensuring uniform color restoration and minimal hair damage, providing a long-lasting and attractive solution for users.
Implementation Method 1
The decolorizing agent applied in this process is characterized by its content of at least one amphoteric and/or zwitterionic surfactant
Data Source
AI summary
The present invention relates to a method for the decolorization of keratin material that has been dyed using at least one pigment, wherein a decolorizing agent containing (a) at least one amphoteric and/or zwitterionic surfactant, and (b) having a pH of 1.0 to 4.3, is applied to the dyed keratin material and rinsed out again after a leave-in time.