Science
Mechanism of Action
This ingredient functions primarily as a binding agent, ensuring the uniform cohesion of powdered cosmetic products. On the skin, it reduces roughness, imparts a sensation of softness, and delivers intense hydration, which is particularly beneficial for dry skin types. POLYURETHANE-80 forms a protective film that acts as a barrier against environmental stressors such as solar radiation, cold temperatures, and urban pollution. Additionally, it can serve as an emulsifier, aiding in the stable integration of water and oil components in formulations, and may be employed in microcapsule technology for the protected, controlled release of active ingredients.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
As a key binding agent, POLYURETHANE-80 significantly enhances the structural integrity and cohesion of powdered cosmetic products, thereby actively minimizing the tendency for dusting.
The Formula
Formulation
Stability
Polyurethanes can be engineered for pH-responsive behavior; some variants may degrade under acidic conditions (e.g., pH 4.0-6.5), while others exhibit swelling at neutral pH (e.g., pH 7.4) within delivery systems. Polyester-based polyurethanes are susceptible to hydrolysis when subjected to prolonged exposure to moisture and heat. Certain polyurethane-based materials can transition into water-soluble gels following immersion in water at elevated temperatures. This ingredient generally shows good compatibility but may degrade or swell upon contact with strong acids (e.g., concentrated Hydrochloric Acid, Sulfuric Acid, Hydrofluoric Acid), specific ketones (e.g., Acetone, Cyclohexanone, Methyl Ethyl Ketone), or halogen compounds (e.g., Dichloromethane).
Conflicts
- Strong acids (e.g., concentrated Hydrochloric Acid, Sulfuric Acid, Hydrofluoric Acid)
- Certain ketones (e.g., Acetone, Cyclohexanone, Methyl Ethyl Ketone)
- Halogen compounds (e.g., Dichloromethane)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that polyurethanes are safe for use in cosmetic applications, provided they are formulated to be non-sensitizing. A critical consideration for formulators is the absolute exclusion of residual diisocyanate monomers, which are recognized sensitizers capable of causing occupational asthma, irritant, and allergic contact dermatitis. It is also important to note that polyurethanes may be supplied within emulsions or solutions that contain other known sensitizers, such as methylisothiazolinone (MI). While broadly considered safe, some individuals may experience allergic reactions or skin sensitivity, manifesting as redness, itching, or rashes. Its usage is strictly regulated by entities such as the European Union and the U.S. Food and Drug Administration (FDA), necessitating adherence to stringent safety protocols.
Your Skin
Skin Compatibility
Our Assessment
Verdict
POLYURETHANE-80 is a valuable ingredient for enhancing product texture, delivering hydration, and providing environmental protection, provided it is precisely formulated to avoid potential sensitizers and impurities.
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