Science
Mechanism of Action
It creates a cohesive hydrophobic layer upon drying, locking actives onto the skin and boosting water resistance. This film also modifies viscosity and stabilizes emulsions.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 Proven to provide water resistance and SPF retention in sunscreens, reducing rub-off.
- 02 Optimizes film formation in SPF moisturizers, improving aesthetics and UV protection durability.
Transparency
Dusting Analysis
No specific data regarding dusting behavior of this ingredient was provided in the research.
The Formula
Formulation
Stability
Typically supplied as a water-dispersible polymer, it requires a neutral to slightly alkaline pH (7.0+) for optimal film clarity and viscosity in aqueous systems.
Conflicts
- Strongly acidic environments (may cause precipitation or loss of viscosity)
- Cationic surfactants (may cause complexation/instability due to its anionic nature)
Safety
Safety Profile
The CIR Expert Panel found it safe for current uses, with a maximum concentration of 25% in leave-on dermal products. It is restricted by EU Annex III for nitrosamine content (max 50 μg/kg).
Your Skin
Skin Compatibility
Our Assessment
Verdict
This polymer is a valuable film-former, enhancing product longevity and water resistance in diverse formulations, with a strong safety profile.
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Similar Ingredients
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References
Sources