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Moumoujus

POLYURETHANE-49.

Insufficient Data / NAIL CONDITIONING

POLYURETHANE-49 is a polymeric ingredient primarily noted for its applications in nail care. It functions by creating a flexible, protective film, contributing to enhanced texture and barrier properties in formulations. Its polymeric nature suggests broader utility in cosmetic stability and aesthetics.

Summary

Film-forming Protective barrier Water resistance enhancer Texture enhancer Aesthetic enhancer Thickener Emulsifier

Science

Mechanism of Action

As a polymer, POLYURETHANE-49 works by forming a protective, flexible film upon application. This film-forming capability contributes to increased water resistance and an improved tactile feel in cosmetic formulations. Beyond its primary role as a film-former, it can also act as an aesthetic enhancer, a thickening agent, an emulsifier, or a general protective barrier.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Unknown
Optimal pH N/A
0 7 14

Stability

No specific optimal pH range is defined for POLYURETHANE-49. However, general polyurethanes can be prone to degradation via hydrolysis at high pH levels, particularly polyester types, and under strongly acidic conditions (e.g., pH 1-3) due to urethane linkage breakdown. Some polyurethanes have exhibited stability within a pH range of 4-9, with POLYURETHANE-39 specifically noted for stability across a wide range of 2-12. Formulation typically involves dispersion in water or other solvents.

Conflicts

  • Strongly acidic conditions (pH 1-3, due to potential urethane linkage hydrolysis for general polyurethanes)
  • Strong bases (potential for degradation for general polyurethanes)
  • Alcohols (may be incompatible for general polyurethanes)
  • Amines (may be incompatible for general polyurethanes)
  • Ammonia (may be incompatible for general polyurethanes)
  • Metal compounds (may be incompatible for general polyurethanes)
  • Strong oxidizers (may be incompatible for general polyurethanes)

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel assessed the safety of POLYURETHANE-49, alongside 65 other polyurethane ingredients, concluding they are safe for cosmetic use under current practices and concentrations, provided they are formulated to be non-sensitizing and contain no detectable residual isocyanates or other monomers.

Your Skin

Skin Compatibility

No Normal
No Dry
No Oily
No Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Verdict

Insufficient Data

While POLYURETHANE-49 is deemed safe for cosmetic applications, its primary documented uses are in nail care, lacking specific clinical data to evaluate its efficacy or optimal integration into precision skincare formulations.

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