Alkoxy Silane Hair Treatment with Alcohol Removal
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Solution Overview
Problem
Current hair dyeing methods using oxidative dyes result in unpleasant odors and hair damage, and the high reactivity of alkoxysilanes leads to fluctuations in product performance due to sensitivity to production and application conditions, affecting dyeing intensity and durability.
Innovation Solution
A process involving the targeted hydrolysis of organic C1-C6 alkoxysilanes with complete removal of released alcohols, followed by optional addition of cosmetic ingredients and packaging, ensures a product with a C1-C6 alcohol content below 10% by weight, enhancing dyeing performance for intense, uniform color with improved wash and rubbing fastness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If oxidative dyes are used to achieve long-lasting hair color, then color durability is improved, but unpleasant odor and hair damage occur
Solution Approach 1:
The patent replaces permanent oxidative dyes with temporary color pigments that do not require harsh oxidizing agents. The pigments are applied and rinsed off after a short period, providing a disposable coloring solution that avoids the harmful effects of oxidative chemistry while still achieving desired color effects.
Solution Approach 2:
The patent introduces a special polymer coating as an intermediary carrier that holds color pigments on the hair surface. This coating system allows pigments to be deposited and retained without needing oxidative chemistry, mediating between the pigment particles and the hair fiber to achieve durable temporary coloration.
2Manufacturing precision
If alkoxy silanes are used to create rapid coating and good dyeing results, then dyeing intensity is improved, but product performance fluctuates due to sensitivity to production and application conditions
Solution Approach 1:
The patent changes the chemical parameters of the coating system by replacing reactive alkoxy silanes with non-reactive polymer coatings. This parameter change eliminates the sensitivity to humidity and temperature that caused performance fluctuations, while maintaining the ability to achieve rapid and intense dyeing results through controlled pigment deposition.
Solution Approach 2:
The patent uses a disposable polymer coating system that does not require chemical activation or crosslinking. This eliminates the need for precise control of reaction conditions and removes the variability associated with silane hydrolysis and condensation processes, resulting in more reliable and consistent product performance.
3Ease of operation
If direct dyes are used for temporary color changes, then application simplicity is improved, but color durability decreases with wash resistance of only 5-20 washes
Solution Approach 1:
The patent creates a composite system combining color pigments with a polymer coating material. This composite structure allows the pigment particles to be embedded in and held by the polymer matrix, providing both the ease of application of direct dyes and significantly improved wash durability through the adherent coating layer.
Solution Approach 2:
The patent uses a flexible polymer coating film as a carrier for color pigments. This thin film forms on the hair surface and holds pigments in place, providing a protective layer that resists washing while allowing simple application. The film acts as a flexible shell that maintains pigment placement through multiple washes.
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 method produces hair treatment products that achieve very intense and uniform color with excellent hiding power and durability, reducing hair damage and odor issues while stabilizing product performance.
Implementation Method 1
The organic silicon compounds used in EP 2 168 633 B1 are reactive compounds from the class of alkoxy silanes. These alkoxy silanes hydrolyze rapidly in the presence of water, forming hydrolysis products and/or condensation products
Implementation Method 2
These alkoxy silanes hydrolyze rapidly in the presence of water, forming hydrolysis products and/or condensation products
Data Source
AI summary
The present invention relates to a method for preparing an agent for treating keratinous material, in particular human hair, comprising the following steps: (1) mixing one or more organic C1-C6-alkoxy-silanes with water, (2) removing, partially or completely, the C1-C6-alcohols from the mixture that were released due to the reaction in step (1), optionally adding one or more cosmetic components, (4) filling a packaging unit with the preparation. The invention is characterised in that the total content of C1-C6-alcohols in the preparation obtained after step (4), in relation to the total weight of the preparation - is less than 10.0 wt%.