Saccharinate Salt Mediators for Keratin Fiber Dyeing
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Solution Overview
Problem
Existing direct dyeing processes for keratin fibers result in temporary or semi-permanent colorations due to weak dye-fiber interactions, leading to poor color intensity and persistence against washing or perspiration.
Innovation Solution
A process involving the simultaneous or sequential application of one or more direct dyes and specific saccharinate salts, represented by compounds of formula (A), to keratin fibers, enhancing color build-up and intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If direct dyes are used for dyeing keratin fibers, then chromatic and intense colors can be obtained, but the color persistence against washing and perspiration deteriorates
Solution Approach 1:
The patent introduces saccharinate salts as intermediary substances that facilitate stronger binding between direct dyes and keratin fibers. These salts act as mediators that enhance the interaction mechanism, allowing the dye to attach more firmly to the fiber while maintaining its chromatic properties. The saccharinate salts modify the dyeing process by creating a more stable dye-fiber complex.
Solution Approach 2:
The patent changes the chemical parameters of the dyeing system by introducing specific saccharinate salts with particular molecular structures (compounds of formula I). This parameter change - adding substances with specific chemical properties including aromatic rings and hydroxyl groups - transforms the weak dye-fiber interaction into a stronger, more persistent bond while preserving color intensity.
2Ease of manufacture
If direct dyes are applied to keratin fibers, then temporary or semi-permanent coloration is achieved, but the durability against successive shampooing deteriorates
Solution Approach 1:
Saccharinate salts serve as intermediary agents that bridge the direct dye and keratin fiber, creating a more durable connection. The intermediary substance modifies the interaction mechanism, allowing the simple direct dyeing process to produce long-lasting results without requiring complex oxidation procedures.
Solution Approach 2:
The patent creates a composite dyeing system combining direct dyes with saccharinate salts. This composite approach merges the simplicity of direct dyes with the durability-enhancing properties of saccharinate compounds, resulting in a dyeing composition that maintains ease of application while achieving superior color longevity.
3Ease of operation
If conventional direct dyeing is used, then the dyeing process remains simple, but the color build-up and intensity deteriorate
Solution Approach 1:
By changing the chemical composition parameters - specifically adding saccharinate salts with defined molecular structures - the patent enhances color build-up and intensity. This parameter modification allows the simple direct dyeing process to achieve superior color saturation and vibrancy without complicating the application procedure.
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 process achieves better color build-up and intense, chromatic colors on keratin fibers, improving the persistence of the color against washing and perspiration.
Implementation Method 1
the nature of the interactions that bind the direct dyes to the keratin fiber
Implementation Method 2
direct dyes are colored or coloring molecules that have affinity for keratin fibers
Data Source
AI summary
The present invention relates to a process for dyeing keratin fibers using a) one or more direct dyes and b) one or more particular saccharinate salts.