Science
Mechanism of Action
This copolymer's primary mechanism involves forming a continuous, flexible film upon application to the skin, hair, or nails. Its polypropylene glycol (PPG) components contribute to a range of viscosity and solubility properties, allowing it to also act as a solubilizer for other ingredients and as a solvent within formulations.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Similar polyurethane structures are known for their stability across a pH range of 4 to 9, demonstrating resistance to significant hydrolysis under normal environmental conditions.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed polyurethanes, including this copolymer, safe for use at assessed concentrations when formulated to be non-sensitizing. The Environmental Working Group (EWG) rates this ingredient as 'LOW' concerning cancer, allergies, immunotoxicity, and developmental/reproductive toxicity. SkinSAFE products frequently include it, indicating good skin tolerability. However, it is classified as a 'sceptical microplastic' by Beat the Microbead, suggesting a need for further environmental research regarding its persistence and potential for bio-accumulation.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This copolymer is a valuable film-forming agent, contributing to product longevity and adherence with a favorable skin safety profile, though its environmental persistence warrants ongoing consideration.
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