Science
Mechanism of Action
Upon evaporation of its volatile carrier, this ingredient forms a flexible, breathable film on the skin. This film provides water and oil repellency, enhances pigment adherence, and significantly extends the wear of cosmetic formulations like sunscreens and foundations.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 At 1-2% concentration, this polymer effectively forms a hydrophobic network, creating a water-resistant barrier crucial for maintaining SPF in sunscreens after water immersion.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Typically supplied in volatile carriers, it maintains stability within a pH range of 4-7. It is water-insoluble unless neutralized with a base, yet demonstrates high salt tolerance.
Conflicts
- VA/butyl maleate/isobornyl acrylate copolymer (immiscible on skin)
- Strong oxidants
- Certain non-polar hydrocarbons (may affect film integrity)
Safety
Safety Profile
The CIR Expert Panel concluded it is safe for use in cosmetics when formulated to be non-irritating. The 25% maximum concentration refers to leave-on dermal products.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This copolymer is a valuable ingredient for enhancing product longevity and water resistance across all skin types, with a proven low risk of irritation and comedogenicity.
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References
Sources