Science
Mechanism of Action
This polymer primarily operates by forming a durable film and adhering disparate components within a cosmetic matrix. Its film-forming attributes enable it to establish a protective barrier on the skin, which may contribute to maintaining optimal hydration and supporting a healthy skin environment.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Polyurethane-56 can undergo degradation via hydrolysis and exposure to UV radiation. Its resistance to strong acids and alkaline solutions is limited, tolerating only diluted versions for short durations at room temperature. While stable in water up to 50°C for extended periods, continuous exposure above 80°C is not recommended. Degradation can also influence pH, with polyester-based variants potentially lowering pH and polyether-based versions potentially increasing it.
Conflicts
- Strong acids
- Strong alkaline solutions
- UV radiation
- Ingredients with sensitizing potential (if formulation exceeds overall safe thresholds)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has assessed Polyurethane-56, concluding it is safe for use in cosmetic applications when formulated to be non-sensitizing and devoid of detectable residual isocyanates or other monomers. There are no specific FDA cosmetic regulations for this ingredient; FDA oversight of polyurethanes primarily relates to their use in food-contact adhesives.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Polyurethane-56 is a valuable ingredient for its film-forming and binding properties, offering structural benefits in formulations and considered safe when properly formulated.
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References
Sources