Science
Mechanism of Action
This copolymer functions as a film-forming agent and emulsion stabilizer. Its styrene units provide hydrophobic properties, while maleic acid units (as ammonium salt) offer hydrophilicity for stable film creation.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 Cosmetic Ingredient Review (CIR) Amended Safety Assessment of Acrylates Copolymers
Transparency
Dusting Analysis
No data suggests this ingredient is commonly dusted.
The Formula
Formulation
Stability
Highly stable in aqueous systems, its solubility and viscosity are pH-dependent. It may precipitate at pH below 4.5-5.0.
Conflicts
- Divalent cations (e.g., Calcium, Magnesium)
- Strong acids (can cause precipitation)
- Cationic surfactants (may form complexes)
Safety
Safety Profile
The CIR Expert Panel classifies it as safe for cosmetic use when non-irritating. Residual styrene monomer levels are strictly controlled within safe limits.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This ingredient is a valuable film-former and emulsion stabilizer, enhancing product performance and water resistance with a high safety profile and broad skin compatibility.
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References
Sources