Get a Free 5ml Mini Now Free 5ml Mini With Every Order of The Mantle
Moumoujus

POLYESTER-1.

Valuable CAS - / FILM FORMING

POLYESTER-1 is a synthetic polymer engineered to create a continuous, flexible film on the skin. This film-forming action is crucial for enhancing product longevity and contributing to a refined texture and smooth application.

Summary

Film-forming Viscosity increasing Water-resistance enhancing Smudge-resistance enhancing Texture enhancing Hydrophobic ingredient dispersant

Science

Mechanism of Action

Upon application, POLYESTER-1 functions by depositing a transparent, flexible film across the skin's surface. This physical barrier significantly improves the water and smudge resistance of cosmetic formulations, while also acting as a thickening agent to achieve a richer texture and improved glide. Furthermore, it plays a vital role in uniformly dispersing hydrophobic (oil-soluble) ingredients within aqueous (water-based) systems, thereby optimizing formula stability and performance.

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 N/A
0 7 14

Stability

POLYESTER-1 demonstrates general chemical resilience against most acids and oxidizing agents. However, it is susceptible to degradation by strong alkaline solutions, particularly when exposed to elevated temperatures. Optimal stability and performance are achieved in acidic, neutral, or oily formulation environments.

Conflicts

  • Strong alkaline solutions (can induce degradation, especially at elevated temperatures).
  • Certain organic solvents, such as trichloromethane when combined with phenol, may lead to degradation.
  • General chemical exposure can result in detrimental effects including discoloration, softening, swelling, crazing, cracking, or a loss of inherent properties.

Safety

Safety Profile

CIR Status
Insufficient data
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) has not conducted a specific safety assessment for POLYESTER-1; however, general CIR evaluations for related polymers (e.g., Dimethicone) suggest they are safe for cosmetic use due to large molecular weights limiting skin absorption. EWG Skin Deep assigns POLYESTER-1 a 'LOW' concern for cancer, allergies, immunotoxicity, and developmental/reproductive toxicity, confirming it is not listed on their Restricted or Unacceptable Lists. Conversely, INCI Beauty provides a 'Medium penalty' across all categories, though without specific clarification of the associated risks.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

POLYESTER-1 is a valuable film-forming polymer that enhances product durability, texture, and ingredient dispersion, presenting a low overall safety concern despite a lack of specific CIR assessment.

Related

Similar Ingredients

Finding similar ingredients…