Cosmetic Composition Stabilizing Anionic Surfactants with Organic Silicon
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Solution Overview
Problem
Conventional shampoo compositions based on anionic surfactants can cause damage to hair fibers due to their aggressive nature, leading to instability and insufficient long-lasting styling effects, while compositions with organic silicon compounds like 3-aminopropyltriethoxysilane suffer from stability issues during storage.
Innovation Solution
A cosmetic composition for keratin fibers comprising organic silicon compounds, anionic surfactants, and nonionic thickening agents, with a weight ratio of organic silicon compounds to anionic surfactants of at least 5.10^-4, which stabilizes the composition and provides long-lasting styling effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional anionic surfactants are used for cleaning hair, then good cleansing power is achieved, but cosmetic properties deteriorate and hair damage occurs
Solution Approach 1:
The patent combines anionic surfactants (for cleansing) with organic silicon compounds having basic functions (for cosmetic protection) into a single shampoo composition. This merging allows the composition to simultaneously achieve effective cleaning while protecting hair from damage, resolving the contradiction between cleansing power and cosmetic safety.
2Object-affected harmful factors
If organic silicon compounds are added to improve cosmetic properties, then hair conditioning is improved, but styling effects deteriorate
Solution Approach 1:
The patent specifies precise parameter ranges for the organic silicon compounds (basic functions with specific pK values between 5-11, particular molecular structures) to optimize both cosmetic conditioning and styling performance. By carefully controlling these chemical parameters, the composition achieves long-lasting styling effects while maintaining improved cosmetic properties.
3Duration of action of stationary object
If organic silicon compounds like 3-aminopropyltriethoxysilane are used for styling effects, then styling properties are improved, but composition stability deteriorates
Solution Approach 1:
The patent introduces nonionic surfactants as intermediary substances that mediate between the organic silicon compounds and anionic surfactants. These nonionic surfactants prevent direct incompatible interactions that would cause instability, while still allowing the organic silicon compounds to provide their styling benefits. This intermediary approach resolves the stability problem.
Solution Approach 2:
The patent creates a composite formulation containing multiple components (anionic surfactants, organic silicon compounds with basic functions, nonionic surfactants, and optional cationic polymers) in specific proportion ranges. This composite material approach allows the incompatible substances to coexist stably while providing synergistic cosmetic and styling effects.
4Object-affected harmful factors
If cationic polymers and silicones are used for conditioning, then cosmetic properties are improved, but styling durability deteriorates
Solution Approach 1:
The patent specifies that when cationic polymers are used, their molecular weight should be in the range of 10,000-1,000,000 g/mol and their charge density controlled within particular ranges. These parameter specifications ensure that the polymers provide cosmetic conditioning without compromising styling durability, unlike conventional formulations.
Data Source
AI summary
The present invention relates in particular to a cosmetic detergent composition and conditioning agent for keratin fibers, in particular human keratin fibers such as hair, comprising in a cosmetically acceptable medium: (i) from 0.01 to 5% by weight, relative to the total weight of said composition, of one or more silicon organic compounds selected from silanes comprising one silicon atom and siloxanes comprising two or three silicon atoms, said silicon organic compounds further comprising one or more basic chemical functions and one or more hydroxyl or hydrolyzable groups per molecule; (ii) one or more anionic surfactants, and (iii) one or more non-ionic thickening agents, said cosmetic composition having a weight ratio between said silicon organic compounds and said anionic surfactants of at least 5.10-4.