Foam Dye Composition Using Polycondensate Stabilizer
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Solution Overview
Problem
Oxidation dye compositions in foam form for keratin fibers face challenges with poor staying power and non-uniform application, leading to inefficient dyeing results.
Innovation Solution
A composition comprising an alkaline agent, an oxidizing agent, and a polycondensate of ethylene oxide and propylene oxide, combined with oxidation dye precursors, is developed in a multi-compartment device for stable and uniform foam delivery, enhancing dyeing properties such as color strength and resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If oxidation dye compositions are formulated in foam form for easy application, then ease of operation is improved, but staying power and application uniformity deteriorate
Solution Approach 1:
The patent modifies the physical and chemical parameters of the foam by incorporating specific polycondensates (polyethylene glycol/polypropylene glycol triblocks) with controlled molecular weights and ratios. These parameter changes in composition and structure enable the foam to maintain both ease of application and improved staying power, resolving the contradiction between user convenience and durability.
Solution Approach 2:
The invention uses composite material formulation by combining multiple components: oxidation dyes, alkaline agents, oxidizing agents, and specifically polycondensates of ethylene oxide and propylene oxide. This composite approach creates a synergistic effect where the polycondensates act as stabilizing agents, improving foam stability and staying power while maintaining ease of application.
2Manufacturing precision
If foam composition is designed for uniform application, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent employs self-service principles by using foam-stabilizing polycondensates that automatically regulate foam formation and stability without requiring complex external control systems. The polycondensates self-regulate the foam's physical properties, achieving uniform application while keeping the device structure relatively simple.
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 a long-lasting, uniform application of dye with improved color strength, resistance to external agents like shampooing, perspiration, and light, while maintaining efficient dyeing properties.
Implementation Method 1
a composition for dyeing keratin fibres such as the hair, in foam form, comprising at least one alkaline agent, at least one oxidizing agent, at least one oxidation dye precursor and at least one polycondensate of ethylene oxide and of propylene oxide
Implementation Method 2
oxidation dyeing or permanent dyeing. More particularly, this form of dyeing uses one or more oxidation dyes, usually one or more oxidation bases optionally combined with one or more couplers
Data Source
AI summary
The invention relates to a composition for dyeing human keratin fibers such as the hair, in foam form, comprising at least one alkaline agent, at least one oxidizing agent, at least one oxidation dye precursor and at least one polycondensate of ethylene oxide and of propylene oxide of structure (I) below: H—(O—CH2—CH2)a(O—CH(CH3)—CH2)b—(O—CH2—CH2)a′—OH, in which a, a′ range from 2 to 150, and b ranges from 1 to 100. The invention also relates to a process for dyeing human keratin fibers using this composition. A subject of the invention is also a device for dyeing keratin fibers, comprising the composition of the invention in liquid form and a foam dispenser for delivering the composition in the form of a foam.