Science
Mechanism of Action
This ingredient functions by forming a fine, cohesive polymeric film upon topical application. This film adheres to the skin's surface, contributing to a smoother feel and potentially aiding in the uniform distribution and extended wear of other cosmetic components. Its film-forming action similarly provides structural hold in hair care applications.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Polyurethane-10 demonstrates reduced stability in strongly acidic environments (pH ~1-3) due to the hydrolysis of its urethane linkages. It is also susceptible to extreme temperatures. Furthermore, its physical behavior, including swelling and fluorescence, can be pH-responsive, with notable changes observed in acidic (pH 4.0-6.5) and neutral (pH 7.4) conditions.
Conflicts
- strong acids
- sensitizers (e.g., methylisothiazolinone) when combining multiple solutions containing them beyond safe concentrations
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel evaluated Polyurethane-10 within a group of 66 polyurethane ingredients, concluding its safety for use in cosmetic applications when formulated to be non-sensitizing. The panel also confirmed the absence of detectable residual isocyanates or other monomers. While polyurethanes hold general FDA approvals for certain medical devices and food contact, a specific FDA cosmetic ingredient status for Polyurethane-10 has not been identified.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Polyurethane-10 is a valuable film-forming polymer for cosmetic formulations, offering broad compatibility and low irritancy while enhancing product performance and skin feel.
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