Science
Mechanism of Action
As a urethane polymer, POLYURETHANE-66 functions by physically modifying the skin's surface and optimizing ingredient binding within a cosmetic matrix. This action aids in maintaining skin hydration, imparting a noticeably soft tactile feel, and enhancing overall skin elasticity. Its capacity to create a protective film on the skin further contributes to defense against environmental aggressors such as sun exposure, cold, and pollution.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
POLYURETHANE-66 can be incorporated into formulations as aqueous emulsions or solutions, demonstrating water dispersibility. Polyether polyurethanes generally exhibit enhanced resistance to hydrolysis (degradation by water or alkaline substances) and maintain stability in mildly basic conditions. While possessing high chemical stability, prolonged exposure to elevated pH levels can, in certain circumstances, induce degradation.
Conflicts
- Sensitizers (e.g., methylisothiazolinone) if combined in multiple solutions leading to significant concentrations.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has rigorously assessed POLYURETHANE-66, alongside 65 other polyurethane ingredients, concluding that they are safe as used in cosmetic practices and concentrations. This determination hinges on the absence of detectable residual isocyanate or other monomeric precursors in the finished ingredient. While diisocyanates, the monomers used in polyurethane synthesis, are known occupational sensitizers, the cured polyurethane polymer itself is considered inert and safe for skin contact. Consequently, formulators are advised to ensure polyurethanes are processed to be non-sensitizing. The FDA also outlines specific requirements for polyurethane resins utilized in food-contact adhesives, indicating a recognized safety framework for the material class.
Your Skin
Skin Compatibility
Our Assessment
Verdict
POLYURETHANE-66 is a valuable multi-functional ingredient that enhances skin hydration, elasticity, and barrier function, particularly beneficial for normal and dry skin types, with a strong safety profile when properly formulated.
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References
Sources