Science
Mechanism of Action
As a film-forming agent, POLYURETHANE-15 creates a thin, invisible layer on the skin's surface. This physical barrier effectively reduces transepidermal water loss, thereby enhancing skin hydration and mitigating tactile roughness. The protective film also provides defense against external environmental factors such as solar radiation, cold temperatures, and pollution. Furthermore, in cosmetic systems, it can function as an emulsifier, stabilizing oil-in-water or water-in-oil mixtures.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
POLYURETHANE-15 exhibits general stability under typical storage and handling conditions, with optimal stability maintained by avoiding extreme temperatures. Based on data for a structurally similar polyurethane (Polyurethane-14), it is not anticipated to undergo significant hydrolysis within a pH range of 4 to 9.
Conflicts
- Formulators must exercise caution regarding components in polyurethane emulsions or solutions, as these can contain sensitizers such as methylisothiazolinone (MI). Combining multiple sources of such solutions could inadvertently lead to a total sensitizer concentration exceeding safe limits.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel deemed POLYURETHANE-15, alongside 65 other polyurethanes, safe for use under current practices and concentrations. This safety is contingent upon formulations being non-sensitizing and devoid of detectable residual isocyanate or other monomeric components. The highest reported concentration for this group was 2.9% for Polyurethane-34 in lipsticks, indicating an established safe upper limit for contact with mucous membranes. Cured polyurethanes are largely inert and generally recognized as safe for dermal contact. FDA regulations also govern polyurethane resins in specific applications like food-contact adhesives and medical devices, primarily concerning production methods.
Your Skin
Skin Compatibility
Our Assessment
Verdict
POLYURETHANE-15 is a valuable film-forming agent that enhances skin moisture and provides a protective barrier, deemed safe for use under specified formulation conditions.
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