Science
Mechanism of Action
This ingredient operates primarily as a film-forming and binding agent. When applied to the skin, it forms a subtle yet effective barrier, which actively contributes to maintaining optimal moisture levels and mitigating textural roughness, resulting in a softer skin feel. Additionally, this protective film helps shield the skin from external factors such as sun exposure, cold temperatures, and pollutants.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
Information regarding 'dusting' properties is not available for Polyurethane-6 in the provided research, as it is typically a film-forming polymer rather than a powder.
The Formula
Formulation
Stability
Polyurethane-6 demonstrates stability across a broad pH range of 4.0 to 9.0, where significant hydrolysis is not anticipated. Due to its high molecular weight and hydrophobic nature, its water solubility is expected to be low, although certain polyurethane variations are supplied as aqueous solutions or emulsions.
Conflicts
- Uncured polyurethane components, particularly uncured resins or isocyanates, must be avoided as they can induce skin irritation and dermatitis. Ensuring the material is fully cured and properly formulated is critical.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed the safety of Polyurethane-6, alongside 65 other polyurethane ingredients, when used in concentrations up to 6% and formulated to be non-sensitizing. Crucially, formulations must be free of detectable residual isocyanates or other reactive monomers. Cured polyurethane is considered inert and generally safe for direct skin contact.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Polyurethane-6 is a valuable film-forming polymer that enhances skin hydration and provides environmental protection, deemed safe for use when formulated without residual reactive components.
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References
Sources