Science
Mechanism of Action
On application, POLYURETHANE-89 establishes a continuous polymeric film across the skin's surface. This film acts as a physical barrier, which can help mitigate transepidermal water loss, thereby enhancing skin hydration and reducing roughness. Furthermore, it aids in binding particulate components within formulations, ensuring product uniformity, and provides protective benefits against environmental factors.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
POLYURETHANE-89, characteristic of general polyurethanes, demonstrates robust stability across a broad pH spectrum, specifically from pH 2 to pH 12, and remains stable under high electrolyte conditions. Polyether polyurethanes, a related class, are noted for enhanced resistance to hydrolysis. Formulators should be vigilant regarding all components within polyurethane emulsions or solutions, particularly potential sensitizers such as methylisothiazolinone (MI), to ensure safe concentration limits are not exceeded. Minor swelling may occur when certain polyurethane formulations encounter solvents like acetone or xylene.
Safety
Safety Profile
The CIR Expert Panel generally deemed polyurethanes, including Polyurethane-89 as part of a larger group of 66 ingredients, safe for cosmetic use under the condition that residual isocyanate or other monomer levels are undetectable. It's important to note that exposure to diisocyanate monomers, which are precursors in polyurethane synthesis, has been linked to occupational respiratory issues and various forms of contact dermatitis; however, this concern is mitigated in properly purified and formulated cosmetic ingredients.
Your Skin
Skin Compatibility
Our Assessment
Verdict
POLYURETHANE-89 is a valuable polymeric ingredient primarily utilized for its film-forming capabilities, contributing to moisture retention and product cohesion in a wide range of cosmetic applications.
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