Ethylene/Acrylic Acid Copolymer
INCI: ETHYLENE/ACRYLIC ACID COPOLYMER
Reviewed by Daisy · Last updated 18 Aug 2026
A synthetic polymer that stabilises formulations and creates a smooth, even finish
Best For Skin Types
All, Oily, Dry, Combination, Sensitive, Mature, Acne-prone
Usage Frequency
Daily
What Is Ethylene/Acrylic Acid Copolymer?
Ethylene/acrylic acid copolymer is a synthetic polymer—a long-chain molecule made by joining ethylene and acrylic acid units together. It is not derived from natural sources, but is manufactured through chemical synthesis for use in cosmetic formulations.
In skincare, this ingredient serves primarily as a binder and film-former. It helps bind formula components together, stabilises emulsions (preventing oils and water from separating), and creates a thin, continuous film on the skin's surface. This film-forming property gives products a smooth application and helps them adhere to the skin.
How It Works
Ethylene/acrylic acid copolymer works in two main ways. First, it acts as an emulsion stabiliser by positioning itself at the boundary between oil and water phases in a formula, preventing them from separating. Second, it forms a polymer film on the skin—a thin, breathable network that dries down and adheres to the skin surface, creating a smooth, even appearance without a heavy or occlusive feel.
Clinical Evidence & References
Published clinical data specific to ethylene/acrylic acid copolymer in skincare is limited. Most evidence comes from cosmetic chemistry and stability testing, which demonstrates its effectiveness as a film-former and emulsion stabiliser in controlled laboratory settings.
The ingredient has been used safely in cosmetic formulations for several decades. Its primary function is structural rather than active, meaning it supports formula integrity and application properties rather than delivering direct therapeutic skin benefits. Any skin benefits are indirect—resulting from the improved stability and texture of the product itself.
How to Use
No special usage technique is required. Apply products containing this ingredient as directed by the manufacturer. It works best as part of a complete formulation, where its stabilising properties help maintain the efficacy of active ingredients throughout the product's shelf life. Store products in a cool, dry place to preserve formula integrity.
Safety & Precautions
Frequently Asked Questions
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