Multi-Chamber Aerosol Dyeing System with Chelating Agent
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Solution Overview
Problem
Existing oxidative hair dye products in multi-chamber aerosol systems face challenges with maintaining a constant mixing ratio of hydrogen peroxide and alkalizing agents, leading to variations in color results due to filling level and flow behavior, and stability issues arise from reactions between hydrogen peroxide and aluminum in the storage containers.
Innovation Solution
A multi-chamber aerosol system with two separately prepared preparations (A and B) containing hydrogen peroxide and fatty constituents, and an alkalizing agent respectively, where preparation (A) includes a chelating agent to prevent reactions with aluminum, ensuring a consistent and stable application mixture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If hydrogen peroxide is stored in aluminum containers, then storage stability is improved, but chemical reactions occur between hydrogen peroxide and aluminum causing decomposition
Solution Approach 1:
The patent introduces an intermediary substance (chelating agent or coating layer) between hydrogen peroxide and aluminum container walls. This intermediary prevents direct contact and chemical reaction between the oxidizing agent and metal, thereby eliminating the harmful decomposition reaction while maintaining the storage container's protective function.
2Ease of operation
If multi-chamber aerosol systems are used for oxidative dyeing, then user convenience is improved by eliminating manual mixing, but the mixing ratio varies due to filling level and flow behavior
Solution Approach 1:
The patent modifies physical parameters of the system including chamber geometry, filling levels, and flow characteristics to ensure that the mixing ratio remains constant regardless of the aerosol container's filling level. By carefully controlling these parameters, the system maintains precise dosing ratios while preserving the convenience of automatic mixing.
3Stability of the object's composition
If separate containers are used for hydrogen peroxide and alkalizing agent, then stability is improved by preventing premature reactions, but the device complexity increases
Solution Approach 1:
The patent divides the dyeing system into separate functional chambers or containers, each holding chemically incompatible components (hydrogen peroxide and alkalizing agent). This segmentation prevents premature chemical reactions while maintaining individual component stability. The separate containers are designed to mix only at the point of application, balancing chemical stability requirements with structural complexity.
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 system ensures a consistent color result and extended storage stability of hydrogen peroxide by preventing undesirable reactions, maintaining a defined composition and application mixture regardless of the filling level, and enhancing user convenience by eliminating the need for manual mixing.
Implementation Method 1
oxidative dyeing agents are usually used. So-called oxidizing dyes are used for permanent intensive colourings with corresponding authenticity properties. These dyes usually contain oxidizing dye pre-products, so-called developer components and coupler components which form the actual dyes amongst themselves under the influence of oxidizing agents—usually hydrogen peroxide.
Implementation Method 2
preparation (A) includes a chelating agent to prevent reactions with aluminum
Data Source
AI summary
Products for oxidative dyeing of keratin fibres include at least two preparations (A) and (B) prepared separately. The first preparation (A) includes, in a cosmetic carrier (A1) hydrogen peroxide and (A2) one or more fatty constituents in an amount of from about 0.1 to about 40 wt. % relative to the weight of preparation (A). The second preparation (B) includes, in a cosmetic carrier, (B1) at least one alkalizing agent and (B2) one or more fatty constituents in an amount of from about 0.1 to about 40 wt. % relative to the weight of preparation (B). Preparation (A) is prepared in a first container and preparation (B) is prepared in a second container, both of which containers include at least two layers. An inner layer of first and/or second containers includes a layer of a synthetic polymer (I). An outer layer of first and/or second containers includes a layer of metal.