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Moumoujus

POLYURETHANE-40.

Valuable CAS - / FILM FORMING

Polyurethane-40 serves as a versatile ingredient primarily functioning as a film former and surface modifier in cosmetic formulations. It contributes to product longevity and texture by creating a cohesive yet flexible layer on the skin.

Summary

Film forming Surface modifier

Science

Mechanism of Action

On the skin's surface, Polyurethane-40 forms a thin, uniform film that modifies the tactile properties and contributes to product wear characteristics.

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 – 9
0 7 14

Stability

Polyurethane-40 demonstrates good stability within a pH range of 4 to 9, with related polyurethanes showing resistance to significant hydrolysis. It can resist degradation in alkaline solutions up to approximately 40% concentration and is often supplied as an aqueous dispersion for easier formulation.

Conflicts

  • Strong bases (e.g., Sodium Hypochlorite, Ammonia) can induce rapid degradation.
  • Contact with plasticizers in packaging materials may result in discoloration or softening.
  • The presence of residual diisocyanate monomers is a significant safety concern that must be managed during formulation.

Safety

Safety Profile

CIR Status
Safe with restrictions
Sensitization risk Moderate

The Cosmetic Ingredient Review (CIR) Panel has assessed polyurethanes, including Polyurethane-40, as safe for cosmetic use, provided they are formulated to be non-sensitizing. While no specific maximum concentration for Polyurethane-40 is stipulated, its safe use is implied within typical cosmetic concentrations under non-sensitizing conditions. The FDA regulates polyurethanes for various applications, distinct from cosmetic ingredient approval. The SCCS has not specifically reviewed Polyurethane-40.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Polyurethane-40 is a valuable film-forming and surface-modifying agent, beneficial for enhancing product performance and texture, contingent upon careful formulation to ensure non-sensitizing properties and diligent control of potential monomer residues.

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