Science
Mechanism of Action
This polymer operates by forming a stable, non-occlusive film on the applied surface. This polymeric layer improves product durability, adhesion, and water resistance, which is particularly beneficial in applications like sunscreens, where it can help reduce UV absorber migration and augment SPF efficacy.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
No data available regarding dusting potential for Polyurethane-69.
The Formula
Formulation
Stability
Polyurethane-69 exhibits robust stability, maintaining integrity for at least 16 weeks across temperatures of 5°C, 25°C, and 50°C. Within a pH range of 4-9, it is not expected to undergo significant hydrolysis.
Conflicts
- Residual diisocyanate monomers (a general manufacturing concern for polyurethanes due to their sensitizing potential, though not expected in the cosmetic-grade ingredient as used).
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that Polyurethane-69, along with 65 other polyurethanes, is safe for use in cosmetics under current practices. It possesses an average molecular weight exceeding 3400 Da, with only 4% composed of low molecular weight fractions (<1000 Da). While residual diisocyanate monomers in general polyurethanes are a known sensitizing consideration, the CIR assessment indicates that properly manufactured Polyurethane-69 is safe for cosmetic application. No specific maximum concentration is defined for Polyurethane-69, but other polyurethanes are safely used up to 15% in nail products.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Polyurethane-69 is a valuable film-forming polymer that enhances product durability and water resistance while maintaining a robust safety profile for diverse cosmetic applications.
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Similar Ingredients
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References
Sources