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Moumoujus

POLYURETHANE-51.

Valuable / NAIL CONDITIONING

POLYURETHANE-51 is a copolymer primarily utilized in skincare for its ability to form a protective film. This ingredient helps to maintain skin hydration and acts as a barrier against environmental stressors.

Summary

Moisturizer Film-former Protective Barrier Binder Surface Modifier

Science

Mechanism of Action

As a copolymer, POLYURETHANE-51 functions by creating a thin, flexible film on the skin's surface. This occlusive layer helps reduce transepidermal water loss, thereby enhancing skin moisture retention and contributing to a smoother texture. Furthermore, it provides a physical barrier, offering protection from external aggressors such as pollution and harsh environmental conditions.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

POLYURETHANE-51 is typically supplied as an emulsion or solution in aqueous media. Hydrolysis at urethane linkages is a potential consideration. While specific pH stability for POLYURETHANE-51 in cosmetic formulations is not extensively detailed, some polyurethane dispersions have demonstrated stability under alkaline conditions (e.g., pH 7.9, 8.5).

Conflicts

  • Formulators must be aware that polyurethane ingredients may be co-supplied with other components, potentially including sensitizers like methylisothiazolinone (MI). Care should be taken to avoid combining multiple solutions that could lead to an undesirable concentration of such sensitizers.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that polyurethanes, including POLYURETHANE-51, are safe within current practices of use and concentration, provided they are formulated to be non-sensitizing. This determination emphasizes the importance of ensuring no detectable residual isocyanate or other monomer precursors, which are known irritants and sensitizers. The FDA also outlines specific production standards for polyurethane resins in applications like food-contact adhesives.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

POLYURETHANE-51 is a valuable polymeric ingredient for skincare, offering significant moisturizing and protective barrier benefits across all skin types, with a robust safety profile when properly formulated.

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