Science
Mechanism of Action
As a synthetic polymer, POLYURETHANE-97 functions primarily as an emulsifier, effectively blending immiscible oil and water phases to create stable formulations. Upon application, it forms a breathable, protective film on the skin's surface, which significantly aids in moisture retention, contributing to improved skin softness and elasticity. This barrier also provides defense against environmental stressors and can visibly reduce superficial skin roughness.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Specific pH stability data for POLYURETHANE-97 is not available; however, polyurethane materials generally exhibit varied stability across pH ranges. Urethane linkages can degrade under strongly acidic conditions (pH 1-3). Conversely, some polyurethanes demonstrate stability at near-neutral pH (approximately 7.4), and can perform well with high-pH chemicals such as 40% sodium hydroxide at lower concentrations. Formulators must meticulously control moisture and other active hydrogen compounds during the ingredient's synthesis due to the high reactivity of polyols and polyisocyanates.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has assessed the broader class of 66 polyurethane ingredients (not specifically Polyurethane-97) as safe in current cosmetic practices and concentrations, provided they are formulated to be non-sensitizing. This safety is strictly contingent upon the complete absence of detectable residual isocyanate or other monomers, as diisocyanates are known occupational sensitizers. Formulators are advised to carefully manage raw material solutions, which may contain co-sensitizers like methylisothiazolinone (MI), to avoid their accumulation to significant concentrations. The U.S. Food and Drug Administration (FDA) regulates the use of polyurethane in cosmetics, ensuring adherence to strict safety standards.
Your Skin
Skin Compatibility
Our Assessment
Verdict
POLYURETHANE-97 is a valuable multi-functional ingredient for enhancing skin hydration, texture, and barrier integrity, contingent on stringent formulation practices to prevent sensitization from residual monomers or co-sensitizers.
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References
Sources