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Moumoujus

POLYURETHANE-27.

Valuable CAS 328389-91-9 / FILM FORMING, HAIR CONDITIONING, SKIN PROTECTING

POLYURETHANE-27 is a multifunctional polymer primarily valued for its film-forming capabilities, creating a continuous, protective barrier on the skin, hair, or nails. It also acts as an effective hair conditioning agent, enhancing texture and manageability, and offers skin protection against external environmental factors.

Summary

Film forming Hair conditioning Skin protecting Binder Hair fixative Plasticizer Surface modifier

Science

Mechanism of Action

POLYURETHANE-27 operates by forming a durable, yet flexible, continuous film upon application to surfaces such as skin, hair, or nails. This polymeric film serves as a protective layer, shielding the skin from the adverse effects of external stressors. In hair applications, this mechanism translates to improved conditioning, resulting in hair that is softer, shinier, more voluminous, lighter, and easier to comb.

Research

Clinical Evidence

Low 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

Polyurethanes generally show degradation when exposed to strong acids and certain solvents. No specific stability data for POLYURETHANE-27.

Conflicts

  • Strong acids, such as 98% Sulfuric Acid or 48% Hydrofluoric Acid, can lead to significant degradation of general polyurethanes.
  • Solvents including Methyl Ethyl Ketone (MEK) and Tetrahydrofuran are not recommended for use with general polyurethanes.
  • Acetone should be avoided for long-term or repeated contact with general polyurethanes.
  • Commercial preparations may contain sensitizers like methylisothiazolinone (MI); formulators should avoid combining multiple such solutions to prevent high sensitizer concentrations.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel concluded that POLYURETHANE-27, among 66 polyurethane ingredients, is safe for use in cosmetic practices and concentrations, provided it is formulated to be non-sensitizing. The Panel determined that there would be no detectable residual isocyanate or other monomers. While no specific maximum concentration for POLYURETHANE-27 was identified, related polyurethanes (e.g., Polyurethane-1, Polyurethane-21) have been used in mascaras at concentrations up to 30% solids without dermal irritation or sensitization.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

POLYURETHANE-27 is a valuable film-forming and skin-protecting polymer, deemed safe by CIR when properly formulated, contributing to product efficacy and skin/hair benefits.

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