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Moumoujus

POLYURETHANE-93.

Valuable / FILM FORMING, HAIR CONDITIONING, HAIR FIXING

POLYURETHANE-93 is a versatile synthetic polymer utilized for its ability to create a continuous film on skin, hair, and nails. It serves multiple functions, including enhancing moisture retention and acting as a protective barrier, while also contributing as an emulsifier within cosmetic formulations.

Summary

Film forming Hair conditioning Hair fixative Emulsifying Moisturizing Barrier protection

Science

Mechanism of Action

Operating by forming a resilient, continuous film across biological surfaces, POLYURETHANE-93 provides both physical protection and improved moisture retention. Its inherent properties also enable it to stabilize oil-in-water or water-in-oil emulsions, thus contributing to product integrity and skin elasticity.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH N/A
0 7 14

Stability

Polyurethanes exhibit general stability under standard environmental conditions in cosmetic products, typically not degrading at concentrations of 5-15%. While a related polyurethane (Polyurethane-14) demonstrates stability across a pH range of 4-9, overall performance can degrade above 93°C (200°F), though this is largely reversible. Irreversible degradation may occur with short-term exposure above 180°C (350°F), prolonged exposure to humid conditions above 70°C (158°F), or steam.

Conflicts

  • Strong acids (e.g., sulfuric, hydrofluoric, hydrochloric acid)
  • Certain ketones (e.g., methyl ethyl ketone, acetone)
  • Phenols
  • High cumulative concentrations of sensitizers like methylisothiazolinone (MI) if present in raw material solutions

Safety

Safety Profile

CIR Status
Safe with restrictions
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel concluded that polyurethanes, including POLYURETHANE-93, are safe when formulated to be non-sensitizing and free of detectable residual isocyanate or other monomers. Formulators must exercise caution to avoid combining raw material solutions that could lead to significant cumulative concentrations of sensitizers, such as methylisothiazolinone (MI). Occupational exposure to diisocyanate precursors carries risks of asthma and dermatitis, but these concerns relate to the manufacturing process rather than the finished cosmetic ingredient under proper formulation.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

POLYURETHANE-93 is a valuable multi-functional ingredient offering film-forming, moisturizing, and barrier protection benefits, deemed safe when precision-formulated to adhere to established restrictions against sensitizers and residual monomers.

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