6-Hydroxybenzomorpholine Hair Dye Composition for Uniform Color
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Solution Overview
Problem
Existing hair dye compositions using oxidation dye precursors often result in unsatisfactory dyeing power, limited color range, poor persistence against external agents, and excessive selectivity along the hair fiber.
Innovation Solution
A composition combining 6-hydroxybenzomorpholine as an oxidation coupler with oxyalkylenated fatty alcohols and polysaccharides, applied to keratin fibers to achieve intense, uniform, and long-lasting color with good gray hair coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If oxidation dye precursors are used to dye keratin fibers, then color can be obtained, but dyeing power is weak and color range is limited
Solution Approach 1:
The patent introduces a specific oxidation coupler (6-hydroxybenzomorpholine) with modified chemical parameters compared to conventional couplers. This coupler contains a morpholine ring structure with specific electronic properties that enhance its coupling efficiency with oxidation bases, thereby improving dyeing power and expanding the achievable color range through systematic parameter modification of the coupler molecule.
Solution Approach 2:
The invention combines the oxidation coupler (6-hydroxybenzomorpholine) with specific surfactants and conditioning agents to create a composite dyeing composition. This composite approach allows the coupler to work synergistically with other components, enhancing overall dyeing performance, color intensity, and range while addressing the limitations of using oxidation precursors alone.
2Reliability
If oxidation dye compositions are applied to keratin fibers, then color is achieved, but persistence against external agents is poor
Solution Approach 1:
The patent incorporates specific surfactants and conditioning agents as intermediary substances that facilitate better penetration and anchoring of the oxidation coupler into the keratin fiber structure. These intermediaries help the dye components resist external aggressive agents by creating a more stable interaction between the dye and the hair, thereby improving persistence against light, shampoo, and perspiration.
Solution Approach 2:
The invention modifies the chemical parameters of the dyeing composition by selecting specific oxidation couplers with enhanced stability properties. The 6-hydroxybenzomorpholine coupler exhibits improved resistance to degradation by external agents compared to conventional couplers, thereby enhancing color persistence and reducing sensitivity to harmful factors.
3Manufacturing precision
If conventional oxidation dye compositions are used, then coloring is achieved, but selectivity is too great causing uneven coloring along the fiber
Solution Approach 1:
The patent employs a specific oxidation coupler that exhibits more uniform reactivity across different regions of the keratin fiber. The 6-hydroxybenzomorpholine structure allows for consistent coupling reactions whether occurring at the root, mid-length, or end of the hair fiber, thereby reducing the excessive selectivity and achieving more uniform coloring along the entire fiber length.
Solution Approach 2:
The invention changes the reactivity parameters of the oxidation coupler to achieve a more balanced reaction profile. The selected coupler has modified electronic and steric properties that enable it to react uniformly with oxidation bases across different fiber conditions, reducing the selective behavior that causes uneven coloring and improving overall color uniformity.
4Duration of action of stationary object
If dye compositions are stored, then they remain available for use, but dyeing performance deteriorates over time
Solution Approach 1:
The patent formulates the dye composition with stabilizing agents and selects oxidation coupler derivatives that are inherently more resistant to degradation during storage. The 6-hydroxybenzomorpholine structure and associated additives provide a protective effect that cushions against chemical degradation, oxidation, or precipitation that would otherwise occur during storage, thereby maintaining dyeing performance even after extended storage periods.
Solution Approach 2:
The invention modifies the chemical stability parameters of the dye composition by selecting specific oxidation couplers and formulation components that exhibit enhanced stability during storage. The chosen coupler and formulation parameters are optimized to prevent degradation reactions, ensuring that the dyeing performance remains reliable even after the composition has been stored for extended periods.
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 provides intense, uniform color with improved persistence and excellent gray hair coverage, maintaining performance even after storage.
Implementation Method 1
These oxidation bases are colorless or weakly colored compounds which, when combined with oxidizing products, can give rise to colored compounds via a process of oxidative condensation.
Data Source
AI summary
The invention relates to a composition comprising at least one oxidation coupler chosen from 6-hydroxybenzomorpholine of formula (I), an addition salt thereof, solvates thereof and/or solvates of the salts thereof, at least one oxyalkylenated C8 to C40 fatty alcohol comprising from 50 to 300 alkylene oxide groups, and at least one polysaccharide.The invention also relates to a process for dyeing keratin fibers, preferably human keratin fibers, notably the hair, which comprises the application of the composition to said keratin fibers.