Science
Mechanism of Action
This polymer operates as an associative rheology modifier, precisely adjusting product viscosity to enhance sensory feel and application properties. Concurrently, it functions as a film-forming agent, creating a thin, flexible layer that confers a protective barrier to the skin. Furthermore, Polyurethane-39 acts as an emulsion stabilizer, preventing phase separation to maintain product homogeneity over time.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
As a formulation enhancer, Polyurethane-39's primary role is textural and stabilizing, rather than delivering active benefits that are typically associated with 'dusting' concerns or specific efficacy thresholds requiring higher concentrations.
The Formula
Formulation
Stability
Polyurethane-39 exhibits remarkable pH insensitivity, maintaining performance across a broad pH range of 2 to 12. Its non-ionic nature and electrolyte tolerance ensure stability in various saline environments, and its liquid form permits direct incorporation at any production stage without requiring pre-swelling.
Conflicts
- strong oxidizing agents
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed the safety of polyurethanes, including Polyurethane-39, for cosmetic use. While residual diisocyanate monomers are a known occupational irritant, specific animal studies for Polyurethane-39 demonstrated no irritation potential.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Polyurethane-39 is a valuable ingredient for enhancing product texture, stability, and providing a subtle protective film, with an excellent safety profile and broad compatibility across skin types and pH ranges.
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References
Sources