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ETHYLENE/PROPYLENE/STYRENE COPOLYMER.

Valuable / VISCOSITY CONTROLLING

A synthetic polymer, Ethylene/Propylene/Styrene Copolymer primarily functions as a texture-enhancing agent, viscosity controller, and film-former in oil-based cosmetic formulations. It improves sensorial experience, aids spreadability, and supports skin hydration by forming a protective barrier.

Emollient Viscosity Controlling Film-Forming Texture Enhancer Binding Agent Stabilizer Occlusive Agent

Science

This synthetic polymer effectively creates gel textures within oil-based cosmetic systems, thereby enhancing product spreadability and overall user experience by imparting a smooth, non-tacky finish. Upon application, it establishes an occlusive barrier on the skin, significantly reducing transepidermal water loss (TEWL) to promote increased hydration, softness, and smoothness. Additionally, it serves as a binding agent to improve product adhesion and provides robust stabilizing capabilities, maintaining product structure and efficacy despite environmental fluctuations.


Research

Medium confidence
Effective range 0.5–1.5%
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Demonstrates robust stabilizing capabilities, crucial for preserving product integrity and efficacy across varying temperatures and humidity levels. It is also highly effective in forming suspensions.

Synergies

  • Butylene/Ethylene/Styrene Copolymer

Safety

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed its safety in current cosmetic applications. Its large molecular size prevents percutaneous absorption, and any residual styrene or 1,3-butadiene monomers are well below levels of concern. While allergic reactions or skin irritations are possible, they are reported as very rare, but consumers with sensitive skin should consult a dermatologist.


Your Skin

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

Our Assessment

Valuable

This highly versatile polymer is a valuable asset for enhancing product texture, ensuring formulation stability, and providing occlusive hydration, making it suitable for all skin types due to its low irritancy profile.


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