Alkoxy Silane Hair Treatment via Segmented Composition
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Solution Overview
Problem
Existing hair dye technologies using oxidative dyes result in unpleasant odors and hair damage, and the high reactivity of alkoxy silanes in hair dye formulations leads to rapid polymerization, making even application and achieving uniform color challenging.
Innovation Solution
A process involving the application of two compositions, (A) and (B), to keratinous material. Composition (A) is a low-water preparation containing C1-C6 organic alkoxy silanes, and composition (B) includes water and terpenes. The terpenes in composition (B) slow down the polymerization rate of the alkoxy silanes, allowing for more controlled and uniform application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If alkoxy silanes are used in hair dye formulations, then wash-resistant coloration is achieved, but rapid polymerization occurs making uniform application difficult
Solution Approach 1:
The invention divides the single composition into two separate compositions: (A) containing the alkoxy silane and (B) containing the water trigger. This segmentation prevents premature polymerization by isolating the reactive alkoxy silane from water until the moment of application, allowing uniform distribution of composition (A) on hair followed by controlled polymerization when composition (B) is added.
Solution Approach 2:
The alkoxy silane is applied to the hair in advance as composition (A) before the polymerization trigger (water from composition (B)) is introduced. This preliminary action allows the alkoxy silane to be evenly distributed and positioned on the hair surface, ensuring uniform coloration before the polymerization process begins.
2Reliability
If oxidative dyes are used for long-lasting coloration, then color fastness is improved, but unpleasant odors and hair damage occur
Solution Approach 1:
The invention changes the chemical parameters of the dyeing system by replacing oxidative dyes with alkoxy silane-based polymers that can incorporate colorants. This parameter change eliminates the need for harsh oxidizing agents, thereby removing the source of unpleasant odors and hair damage while maintaining long-lasting coloration through the wash-resistant polymer film formed by alkoxy silane polymerization.
Solution Approach 2:
The invention uses direct dyes or pigments that are deposited on the hair surface and fixed by the alkoxy silane polymer film, rather than relying on oxidative dyes that require complex chemical reactions. This approach uses simpler, less harmful coloring substances that achieve long-lasting results through physical deposition and polymer encapsulation rather than chemical bonding.
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
This approach allows for the achievement of wash-resistant, uniformly colored hair without the drawbacks of rapid polymerization and hair damage, while also eliminating unpleasant odors associated with oxidative dyes.
Implementation Method 1
These alkoxy silanes hydrolyze at high rates in the presence of water and form hydrolysis products and/or condensation products
Implementation Method 2
These alkoxy silanes hydrolyze at high rates in the presence of water and form hydrolysis products and/or condensation products
Implementation Method 3
The polymerization that takes place during storage of the alkoxy silanes in aqueous medium manifests itself in a thickening or gelation
Data Source
AI summary
The object of the present disclosure is a method for treating keratinous material, in particular human hair, involving applying the following to the keratinous materiala first composition (A) comprising, relative to the total weight of the composition (A)(A1) less than 10% by weight of water and(A2) one or more organic C1-C6 alkoxy silanes and/or their condensation products, anda second composition (B) comprising(B1) water and(B2) one or more terpenes.