Two-Part Hair Dye Foam Composition for Even Application
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Solution Overview
Problem
Existing hair dye compositions, particularly two-part aerosol types, face issues with uneven bleaching or dyeing due to inconsistent mixing ratios, corrosion of containers, and limited color tone changes, while one-part non-aerosol types lack strong bleaching ability, making hair dyeing cumbersome and requiring repeated procedures.
Innovation Solution
A two-part hair dye composition with a non-aerosol type foamer container, containing an alkali agent and hydrogen peroxide, and incorporating specific proportions of nonionic and cationic surfactants, which is discharged as foam to ensure even application and high conditioning effects, preventing liquid dripping and irritation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a two-part aerosol hair dye composition is used, then the hair dyeing operation is simplified, but uneven bleaching or dyeing occurs due to inconsistent mixing ratio
Solution Approach 1:
The patent introduces a foaming agent as an intermediary substance that enables the two-part composition to be dispensed as a stable foam. This foam structure acts as a mediator that maintains the mixing ratio of the first and second parts while simplifying application, thereby resolving the contradiction between ease of operation and mixing ratio consistency.
2Ease of manufacture
If a pressure-tight container is used for two-part aerosol hair dye, then the composition can be stored and dispensed, but the container is oxidized and corroded by hydrogen peroxide
Solution Approach 1:
The patent employs a disposable non-aerosol container that is not required to be highly durable or pressure-resistant. This single-use container avoids the corrosion problem by being discarded before significant degradation occurs, while still providing adequate storage and dispensing functionality for the hair dye composition.
3Ease of manufacture
If a pressure-tight container is used for two-part aerosol hair dye, then the composition can be stored, but the internal pressure is excessively increased by degradation of hydrogen peroxide
Solution Approach 1:
The disposable container design allows the product to be used before hydrogen peroxide degradation causes excessive pressure buildup. The container is intended for single or limited use, eliminating the need to withstand long-term pressure increases from peroxide decomposition.
4Ease of operation
If a one-part non-aerosol hair dye is used, then the application is simplified, but the bleaching ability is weak or non-existent
Solution Approach 1:
The patent combines the simplicity of one-part application with the bleaching capability of two-part chemistry by formulating a composition where the first part (containing alkali agent) and second part (containing hydrogen peroxide) are pre-combined in a foam. This merging allows the user to apply a single product while achieving both the ease of one-part application and the effective bleaching of two-part systems.
5Ease of manufacture
If conventional liquid or creamy hair dye composition is used, then the composition can be stored, but it is difficult to apply evenly to the head hair
Solution Approach 1:
The patent utilizes phase transition by transforming the liquid or creamy composition into a foam phase. This foam phase is easier to apply evenly to the head hair while maintaining storage stability, as the foam structure allows for uniform distribution of the dye components across the hair surface.
Data Source
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AI summary
Provided is a two-part hair dye composition, including a first part containing an alkali agent, a second part containing hydrogen peroxide, and a non-aerosol type foamer container for discharging a mixture solution of the first part and the second part as foam, in which the mixture solution contains the following components (A) and (B): (A) 0.1 to 10% by mass of a nonionic surfactant, and (B) 0.1 to 5% by mass of a cationic surfactant, and the mass ratio of the component (A) to the component (B) (content of the component (A)/content of the component (B)) is 1 to 100.