Science
Mechanism of Action
POLYURETHANE-72 operates through several distinct mechanisms. As a binding agent, its polymeric structure forms interconnections between particles, crucial for maintaining the physical cohesion of powdered products. Its film-forming capability involves depositing a durable, continuous, and flexible layer upon application to skin, hair, or nails, thereby providing a protective barrier or improving product aesthetics and longevity. In nail applications, this film actively conditions by reinforcing the nail structure, which helps to improve resistance against chipping, cracking, and brittleness.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
POLYURETHANE-72 functions primarily as a binding agent, specifically noted for its ability to ensure the cohesion of powdered products. Its role is to prevent particle dispersion and maintain product integrity, rather than being an ingredient itself prone to dusting.
The Formula
Formulation
Stability
Polyurethanes, including POLYURETHANE-72, exhibit general stability within cosmetic formulations when maintained within a pH range of 4.0 to 9.0 under normal environmental conditions. They are not anticipated to undergo significant degradation within this range. Polyurethane dispersions are known to maintain stability even at high viscosities and can be effectively diluted to achieve lower solids content while retaining their structural integrity.
Conflicts
- Exposure to high pH environments (above 9.0) can induce degradation, characterized by observable swelling, tackiness, discoloration, and a reduction in mechanical strength.
- Formulations must rigorously avoid the presence of residual diisocyanate monomers, as these compounds are definitively associated with irritant and allergic contact dermatitis reactions.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that polyurethanes, including POLYURETHANE-72, are safe for cosmetic use when formulated to be non-sensitizing. This determination hinges on the assurance of no detectable residual isocyanate or other monomer impurities. While POLYURETHANE-72 was not widely reported in cosmetic use at the time of the CIR assessment, its anticipated maximum concentration in future applications is expected to align with similar polyurethanes. For instance, Polyurethane-33 has been reported at a maximum concentration of 7.5% in leave-on dermal skincare preparations. The FDA also outlines specific conditions for polyurethane resins utilized in adhesives that may come into contact with food.
Your Skin
Skin Compatibility
Our Assessment
Verdict
POLYURETHANE-72 is a valuable polymeric ingredient offering film-forming, binding, and nail conditioning properties, deemed safe for cosmetic use when precisely formulated within specified parameters to prevent sensitization.
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References
Sources