Science
Mechanism of Action
On the skin, POLYURETHANE-9 forms a flexible, continuous film that physically reinforces the skin's surface, thereby establishing a protective barrier. Simultaneously, its binding capabilities ensure the uniform integration and stability of diverse ingredients within a formulation.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
POLYURETHANE-9 demonstrates optimal stability within a pH range of 4 to 9. Degradation via hydrolysis of urethane linkages may occur in strongly acidic or highly alkaline conditions. Many formulations utilize this ingredient as an aqueous dispersion.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that POLYURETHANE-9, along with other polyurethanes, is safe for cosmetic application when formulated to be non-sensitizing and free from detectable residual monomers. Formulators should be mindful to avoid combining solutions that may introduce sensitizers, such as methylisothiazolinone, at significant levels. EWG Skin Deep identifies low concerns for cancer, allergies, immunotoxicity, and reproductive toxicity.
Your Skin
Skin Compatibility
Our Assessment
Verdict
POLYURETHANE-9 is a valuable cosmetic polymer for enhancing formulation stability and providing a protective film, demonstrating a strong safety profile across all skin types.
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