Polysaccharide Copolymers for Low-Irritation High-Volume Foam
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Solution Overview
Problem
Existing personal care formulations face challenges in achieving high foam volume and stability while minimizing skin and eye irritation, as synthetic detergents used for foaming are often irritating and result in poor foaming performance when made milder.
Innovation Solution
The use of superhydrophilic amphiphilic copolymers, specifically polysaccharides modified with hydrophobic reagents like dodecenyl succinic anhydride, which are designed to produce low-irritation, high-foaming compositions by adjusting pH and reaction conditions, combined with micellar thickeners for enhanced foaming properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If synthetic detergents are used to achieve high foam volume and stability, then foaming performance is improved, but skin and eye irritation increases
Solution Approach 1:
The patent modifies the chemical structure of polysaccharides by introducing hydrophobic groups through chemical reactions (esterification with succinic anhydride derivatives), changing the surface properties to enable foam formation while maintaining mildness. This parameter change in molecular structure allows the material to function as a surfactant without the irritation of synthetic detergents
Solution Approach 2:
The invention creates composite molecular structures by combining polysaccharide backbones with hydrophobic side chains through chemical modification. This composite structure integrates the mildness of natural polysaccharides with the foam-forming capability of surfactants, achieving both low irritation and high foaming performance
2Productivity
If the amount of anionic surfactants is increased to improve foaming, then foam volume increases, but irritation increases
Solution Approach 1:
The patent uses polysaccharide-based materials that can be easily degraded or removed from the skin, replacing persistent synthetic detergents. The natural polysaccharide backbone provides biodegradability and mildness while the temporary hydrophobic modification enables the required foaming function without long-term irritation
3Object-affected harmful factors
If polymerized surfactants with low degree-of-polymerization are used to improve mildness, then irritation decreases, but foaming performance deteriorates
Solution Approach 1:
The patent optimizes the degree of polymerization and the extent of hydrophobic modification to achieve the right balance between mildness and foaming. By controlling the molecular weight and the ratio of hydrophobic to hydrophilic groups, the material maintains low irritation while providing sufficient surfactant activity for effective foam formation
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 approach results in compositions that exhibit significant low-irritation properties and high flash foaming capabilities, maintaining effective personal use without excessive viscosity, with the superhydrophilic amphiphilic copolymers forming stable, high-volume foam with rapid generation.
Implementation Method 1
The superhydrophilic amphiphilic copolymers include a low molecular weight, polysaccharide modified with a hydrophobic reagent, such as substituted succinic anhydride, to provide good foaming
Implementation Method 2
superhydrophilic amphiphilic copolymers for generating a high volume stable foam in applications
Data Source
Figure 1
AI summary
A superhydrophilic amphiphilic copolymer and process for making the superhydrophilic amphiphilic copolymer includes a low molecular weight polysaccharide modified with a hydrophobic reagent, such as substituted succinic anhydride. The superhydrophilic amphiphilic copolymer system generates stable foam for use in applications, such as healthcare formulations, with low irritation of the eyes and skin.