Science
Mechanism of Action
The copolymer functions by creating a hydrophobic, continuous microfilm across the application surface. It utilizes a molecular architecture that combines rigid aromatic units for durability with branched, flexible glycols and fatty acids for elasticity, allowing it to adhere to keratinous structures without cracking or peeling while sealing in moisture and active ingredients.
Research
Clinical Evidence
Medium confidence5%
Key findings
- 01 Demonstrated utility in durable hair and nail compositions, creating a flexible and moisture-resistant film at concentrations up to 15%.
Transparency
Dusting Analysis
As a functional film-former, it is rarely 'dusted' because its physical effects on product texture and wear-time are detectable at very low thresholds; however, significant water-resistance benefits typically require concentrations above 1%.
The Formula
Formulation
Stability
Maintains structural integrity within standard cosmetic pH ranges but may undergo hydrolysis if exposed to highly acidic (pH <3) or strongly alkaline (pH >9) environments.
Synergies
- Lipophilic sunscreens
- Mineral pigments
- Hydrophobic emollients
Conflicts
- Strongly alkaline ingredients
- Strong oxidizing agents
- Highly acidic systems
Safety
Safety Profile
While not individually assessed by the CIR, it belongs to a class of anhydride copolymers deemed safe for use in nail and cosmetic products up to 32.8%.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An excellent auxiliary ingredient for enhancing the durability and water-resistance of protective skincare and color cosmetics.
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References
Sources