Science
Mechanism of Action
SODIUM ACRYLATES/METHACRYLOYLETHYL PHOSPHATE COPOLYMER operates by improving the uniform distribution of inorganic UV filters in skincare formulations, thereby boosting their SPF effectiveness and ensuring even pigment distribution in color cosmetics. As an acrylates copolymer, it additionally functions as a rheology modifier, thickening and stabilizing emulsions, and provides emulsifying properties. On the skin, it forms a fine, protective layer that aids in reinforcing the moisture barrier and locking in hydration.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This ingredient is water-soluble. While its precise optimal pH range for stability is not explicitly stated, related methacrylate copolymers often exhibit pH-responsive dissolution, becoming soluble above certain pH values (e.g., pH 5.5). Effective dispersion and solubility of acrylates copolymers can typically be achieved by neutralizing carboxyl groups with appropriate bases.
Synergies
- Inorganic UV filters (e.g., Zinc Oxide, Titanium Dioxide)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has assessed acrylates copolymers, including this specific compound, concluding they are safe for cosmetic use when formulated to be non-irritating. To mitigate potential irritation from residual monomers, the use of highly purified copolymers is recommended. For leave-on products with dermal exposure, the maximum reported concentration for Acrylates Copolymer is up to 25%.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A versatile polymer that significantly enhances sunscreen performance, improves product texture, and supports skin hydration, making it a valuable addition to precision skincare formulations.
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References
Sources