Science
Mechanism of Action
This polymer functions by creating a flexible, protective film on the skin's surface, which can help shield against environmental factors and support moisture retention. In product formulations, it effectively stabilizes immiscible liquids, preventing separation, and modifies the product's slip and surface properties to improve tactile feel and application.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
As a polymer typically incorporated in water-dispersed or waterborne forms, Polyurethane-16 is not commonly associated with dusting in cosmetic applications.
The Formula
Formulation
Stability
Polyurethane-16 is less stable in strongly acidic conditions (pH 1-3), which can lead to hydrolysis of its amide group. High pH (alkaline) environments can also instigate degradation. Optimal stability is generally found in neutral to mildly acidic or alkaline ranges. It is commonly supplied as a water-dispersed or waterborne ingredient.
Conflicts
- Strongly acidic conditions (pH 1-3) due to hydrolysis risk.
- High pH (alkaline) environments, which can cause degradation.
- Combining with other sensitizers (e.g., methylisothiazolinone) if the raw material containing Polyurethane-16 already includes them, potentially leading to elevated sensitizer concentrations.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel deemed Polyurethane-16, alongside 65 other polyurethane ingredients, safe for cosmetic use, provided formulations are non-sensitizing and free from detectable residual isocyanates or monomers. Formulators must ensure raw materials do not introduce significant concentrations of known sensitizers.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Polyurethane-16 is a valuable ingredient, enhancing product stability and texture while providing protective and moisturizing benefits to the skin with a low irritancy risk.
Related
Similar Ingredients
Finding similar ingredients…