Foam-like Dye Surfactant System for Stable Hair Coloring
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Solution Overview
Problem
Existing hair dye foam applications face instability issues due to high salt and dye concentrations, leading to quick collapse and poor color application, especially when propellant gases are not used.
Innovation Solution
A hair dye composition containing a specific surfactant combination of sugar surfactants, amphoteric surfactants, and anionic surfactants, with a total surfactant content of at least 10.5% by weight, which forms a stable foam that maintains stability even at higher salt concentrations, ensuring intense and durable color results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high salt and dye concentrations are used in foam applications, then color intensity is improved, but foam stability deteriorates causing quick collapse
Solution Approach 1:
The patent changes the chemical parameters of the foam system by introducing a specific surfactant combination (sugar surfactant + amphoteric surfactant) in optimized ratios (0.5-5% sugar surfactant, 1-10% amphoteric surfactant). This parameter change allows the foam to maintain stability even at higher salt concentrations (2-10% NaCl), thereby resolving the contradiction between color intensity and foam stability
Solution Approach 2:
The patent uses a composite surfactant system combining two different types of surfactants (sugar surfactant and amphoteric surfactant) with complementary properties. The sugar surfactant provides foam generation while the amphoteric surfactant enhances stability in high salt environments. This composite approach allows simultaneous achievement of intense color application and stable foam structure
2Object-affected harmful factors
If propellant gases are eliminated from foam containers, then safety and simplicity are improved, but foam stability and application quality deteriorate
Solution Approach 1:
The patent extracts and eliminates the propellant gas component from the foam system, replacing it with a propellant-free foam generation mechanism. The foam is generated mechanically through the interaction of the surfactant combination with water and air during application, eliminating safety hazards while maintaining foam stability through the optimized surfactant system
Solution Approach 2:
The foam system becomes self-sufficient by generating foam through the chemical and physical interaction of its own components (surfactants, water, air) during application, without requiring external propellant gases. The surfactant combination itself provides the necessary foam-stabilizing properties, making the system self-service and eliminating harmful propellants
3Ease of operation
If foam breaks quickly on hair, then wetting and color application are improved, but color durability deteriorates
Solution Approach 1:
The patent creates a dynamic foam system that adapts its stability over time. Initially, the foam provides good wetting and color application, then gradually transitions to a more stable state that ensures color durability. The amphoteric surfactant plays a key role in this dynamic behavior, adjusting foam stability as the application progresses
Data Source
AI summary
Agent (I) comprises at least one oxidation dye precursor and a combination of at least one or more sugar surfactants and at least one or more amphoteric surfactants, where (I), in application-ready form, contains at least 10.5 wt.% of a surfactant. Independent claims are included for: (1) a method for coloring keratin fibers comprising applying (I) from an application device as a foam, distributing (I) on the fibers, leaving (I) for a period of 1-60 (preferably 5-40) minutes on the fibers and washing (I) from the fibers; and (2) a kit, for coloring keratin fibers, comprising at least two separate agents, where the first agent comprises at least one oxidation dye precursor and the second agent comprises at least one oxidizing agent.