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Moumoujus

POLYURETHANE-90.

Valuable / BINDING

Polyurethane-90 acts as a sophisticated film-forming polymer, engineered to create a protective, water-resistant barrier on the skin. This functional ingredient not only aids in moisture retention but also enhances the texture and resilience of cosmetic formulations.

Summary

Film-forming agent Moisturizing agent Skin protectant Texture enhancer Water-resistant agent Makeup longevity enhancer

Science

Mechanism of Action

This ingredient functions by forming a flexible, uniform film upon application to the skin. This polymeric layer effectively minimizes transepidermal water loss, thereby boosting skin hydration and providing a physical shield against environmental aggressors. Its film-forming capacity also contributes to a smoother product finish and improved longevity, particularly in makeup formulations.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 4.5 – 7
0 7 14

Stability

Polyurethane-90, like related cosmetic polyurethanes, is noted for stability within a pH range of 4.5 to 7.0. General polyurethanes demonstrate resistance to various environmental factors including UV radiation and extreme temperatures. However, specific chemical stability can vary based on the polymer's structural nuances (e.g., ether-based vs. ester-based) and exposure conditions.

Conflicts

  • Residual diisocyanate monomers (must be strictly absent in cosmetic-grade material)
  • Strong solvents such as Acetone (can cause severe degradation to general polyurethanes)
  • High concentrations of certain sensitizers, if present as contaminants in polyurethane emulsions or solutions provided by suppliers (e.g., methylisothiazolinone)

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has comprehensively evaluated a broad category of 66 polyurethane ingredients, concluding their safety for use in cosmetics under current application practices and concentrations. This safety determination is contingent on the ingredients being formulated to be non-sensitizing and free from detectable residual isocyanates or other monomers, as isocyanates are recognized irritants and potential sensitizers. While POLYURETHANE-90 specifically lacks an individual CIR, SCCS, or FDA cosmetic status, its safety profile is derived from this general assessment of polyurethanes.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

POLYURETHANE-90 is a valuable film-forming agent, contributing to enhanced skin hydration and protection, with its safety profile inferred from the general assessment of cosmetic-grade polyurethanes when properly formulated.

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