Science
Mechanism of Action
Its tertiary amino groups can protonate in aqueous solutions, enabling it to act as a cationic polymer. This property allows for enhanced adhesion to negatively charged surfaces like skin proteins, providing a continuous, protective film.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 Studies showed 0.5-1.0% has low potential for skin irritation and sensitization in human subjects (n=106).
- 02 A 7.5% concentration enhanced solubility for lipophilic molecules by approximately 940-fold in drug delivery models, though often decreasing drug permeability.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The polymer remains water-soluble below pH 8.2. Above this pH, deprotonation can lead to reduced solubility and potential precipitation, thus formulation pH is critical.
Conflicts
- Strongly anionic surfactants (may cause complexation/precipitation)
- High pH environments (>8.5)
- High ionic strength (high salt concentrations can lower the critical solution temperature)
Safety
Safety Profile
The CIR Expert Panel concluded that similar acrylates copolymers are safe for use, provided they are formulated to be non-irritating. Typical leave-on product concentrations range from 0.001% up to 25%.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A valuable functional ingredient, this copolymer enhances product durability and water resistance through film formation, suitable for all skin types with a low risk of irritation.
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References
Sources