Science
Mechanism of Action
This ingredient operates as a hydrophobically modified 3D network. The C18-22 alkyl chains function as hydrophobic anchors that bridge oil droplets or air bubbles, while the diethylaminoethyl methacrylate (DEAEMA) groups provide a cationic charge when protonated. Together, they form a cohesive matrix in the aqueous phase that stabilizes formulations against phase separation and significantly increases foam density and elasticity.
Research
Clinical Evidence
High confidence2.5%
Key findings
- 01 Korean Patent KR102556558B1: Demonstrated significant improvements in foam elasticity, density, and emulsion stability in surfactant systems without increasing skin irritation.
Transparency
Dusting Analysis
As a structural rheology modifier, this ingredient is rarely used for marketing 'dusting.' If present below 0.1%, it likely serves no functional purpose for texture or stabilization; however, its functional benefits are typically realized between 0.5% and 5.0%.
The Formula
Formulation
Stability
Maximum stability and thickening efficiency are achieved in slightly acidic environments (pH 4.5–6.0) where the amino groups are fully protonated, maximizing the cationic charge.
Synergies
- Polyols (Glycerin, Butylene Glycol)
- Mild surfactants
- Magnesium Ascorbyl Phosphate (MAP)
Conflicts
- High concentrations of strong anionic surfactants
- High electrolyte/salt concentrations
Safety
Safety Profile
While not individually reviewed by the CIR, the polymer's high molecular weight prevents skin penetration. Its constituent monomers are recognized as safe in polymer form. It is listed in the EU CosIng database without restrictions.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An essential technical ingredient for achieving superior 'bouncy' textures and foam stability in precision cleansing and emulsion systems.
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References
Sources