Science
Mechanism of Action
This polymer operates by forming a uniform, invisible film on the skin's surface, which effectively minimizes transepidermal water loss and safeguards against external environmental aggressors like sun, cold, and pollution. Beyond its primary role as a film former, POLYURETHANE-36 can also act as an emulsifier, stabilizing oil and water phases, and contributes moisturizing properties to promote skin suppleness.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
POLYURETHANE-36 demonstrates robust stability within cosmetic formulations, reported to remain undegraded at concentrations from 5% to 15% under normal environmental conditions. As a polyether polyurethane, it exhibits enhanced resistance to hydrolysis, performing well in environments with moisture or mild alkaline exposure.
Conflicts
- Strong acids (e.g., Sulfuric Acid 98%, Hydrofluoric Acid 48%)
- Certain ketones (e.g., Methyl Ethyl Ketone, Tetrahydrofuran)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) has deemed polyurethanes, including POLYURETHANE-36, safe with restrictions. The primary safety concern revolves around controlling residual diisocyanate monomers, which are associated with irritant and allergic contact dermatitis. The polymer itself is generally considered safe when these hazardous monomer levels are rigorously controlled. Specific toxicokinetic and acute dermal toxicological studies for POLYURETHANE-36 were not found in published literature at the time of the CIR report. Its FDA status primarily pertains to medical devices and food contact materials, not direct cosmetic skin application.
Your Skin
Skin Compatibility
Our Assessment
Verdict
POLYURETHANE-36 is a valuable film-forming polymer that enhances skin hydration and protection, provided formulations rigorously control residual monomer levels for optimal safety.
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References
Sources