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Moumoujus

STYRENE/ALLYL BENZOATE COPOLYMER.

Optional / FILM FORMING, VISCOSITY CONTROLLING

Styrene/Allyl Benzoate Copolymer is a polymeric ingredient primarily recognized for its ability to form an ultra-thin, continuous film on the skin's surface, acting as a protective barrier. Beyond its film-forming capabilities, it also functions as a surfactant and suspending agent, contributing to emulsion stability and particulate dispersion in various formulations.

Summary

Film-forming agent Surfactant Suspending agent Opacifying agent Viscosity increasing agent

Science

Mechanism of Action

This copolymer operates by creating an invisible, resilient film upon application, which helps to shield the skin from environmental aggressors such as chemical irritants, UV radiation, and atmospheric pollution. Its amphiphilic nature further enables it to act as a surfactant, reducing surface tension, and as a suspending agent, ensuring even distribution of insoluble particles within a product.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

No specific optimal pH range for stability was identified. General formulation considerations for copolymers typically focus on preventing potential irritation.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The CIR Expert Panel has deemed Styrene/Allyl Benzoate Copolymer, as part of the broader 'Styrene and Vinyl-type Styrene Copolymers' category, safe for cosmetic use within current practices and concentrations. This is attributed to its large molecular size, which is expected to prevent percutaneous absorption. While there is a general concern regarding potential residual styrene monomer (a possible carcinogen and neurotoxin) in styrene-based copolymers, compliant cosmetic grades are formulated to minimize these levels.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Optional

As a CIR-approved film-forming and stabilizing agent, this copolymer offers protective benefits, though specific efficacy data and detailed skin compatibility insights remain limited for direct application to all skin types.

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