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STYRENE/ACRYLATES COPOLYMER/POLYURETHANE.

Valuable CAS - / BINDING, FILM FORMING, PLASTICISER

Styrene/Acrylates Copolymer/Polyurethane is a versatile polymer designed to form an imperceptible, protective film on the skin's surface. This advanced ingredient is integral for creating durable, moisture-retaining barriers, while also enhancing product texture and stability. Its multifunctional properties extend to improving product cohesion and flexibility.

Summary

Film-forming Binder Plasticizer Opacifying Texture enhancing Formulation stabilizing

Science

Mechanism of Action

This copolymer functions primarily as a film-forming agent, creating an ultra-thin, continuous barrier on both skin and hair. This protective film effectively minimizes transepidermal water loss, thus optimizing skin hydration. Beyond moisture retention, it shields the skin from external aggressors such as environmental pollution, chemicals, and UV radiation. Its multifunctional nature also extends to improving cosmetic formulations by acting as an opacifying agent, ensuring product cohesion as a binder, and boosting flexibility and durability as a plasticizer. Furthermore, it contributes to desirable product texture and overall formulation stability.

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

The Styrene/Acrylates Copolymer component exhibits general stability under recommended storage conditions. It significantly contributes to the stabilization of skincare formulations and demonstrates broad compatibility with diverse cosmetic ingredients.

Conflicts

  • strong oxidizing agents

Safety

Safety Profile

CIR Status
Safe with restrictions
Max tested
36.5%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel considers Styrene/Acrylates Copolymer and chemically similar styrene and vinyl-type styrene copolymers safe for use in cosmetics. This safety assessment is supported by their large molecular weight, which leads to minimal skin absorption, provided formulations are designed to be non-irritating. Maximum use concentrations for related styrene and vinyl-type styrene copolymers can range up to 36.5%. For the polyurethane component, the CIR Expert Panel concluded in 2017 that potential harmful residues from isocyanates are not a significant concern for human health. However, the Scientific Committee on Consumer Safety (SCCS) has indicated that there is insufficient data to conclude on the safety of nano forms of Styrene/Acrylates copolymer, specifically regarding potential toxicity if nanoparticles penetrate cells. There is no specific SCCS opinion on the general form of Styrene/Acrylates Copolymer/Polyurethane.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

Styrene/Acrylates Copolymer/Polyurethane is a valuable multifunctional ingredient, offering significant benefits in skin protection, hydration, and product formulation stability, with an established safety profile for its non-nano forms within defined concentration limits.

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