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ETHYLENE/ACRYLIC ACID COPOLYMER.

Valuable CAS 9010-77-9 / BINDING, EMULSION STABILISING, FILM FORMING, OPACIFYING

Ethylene/Acrylic Acid Copolymer is a versatile polymer engineered to enhance cosmetic formulation integrity. It acts primarily as a binding agent, holding ingredients together, and as an emulsion stabilizer, preventing ingredient separation. Additionally, it forms a protective film on the skin, contributing to product longevity and feel.

Summary

binding emulsion stabilising film forming opacifying viscosity increasing

Science

Mechanism of Action

This copolymer operates through several mechanisms within a formulation. It functions as a binding agent, ensuring the uniform cohesion of powdered and liquid components. As an emulsion stabilizer, it facilitates the formation of stable emulsions and prevents the phase separation of oil and water, thereby extending product shelf-life. Its film-forming capacity creates a continuous, thin coating on surfaces like skin, hair, or nails, which can offer protection or enhance product wear. Furthermore, it can modify product appearance as an opacifying agent and adjust texture as a viscosity increasing agent.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

Ethylene/Acrylic Acid Copolymer functions as a binding agent, promoting cohesion within formulations rather than contributing to dusting. There is no data to suggest it is commonly associated with dusting issues.

The Formula

Formulation

Solubility
Water
Optimal pH 7.2 – 10.5
0 7 14

Stability

For optimal integration into water-based emulsions, Ethylene/Acrylic Acid Copolymer should be dissolved or dispersed in hot alkaline solutions, typically maintaining a pH between 7.2 and 10.5. High agitation during phase inversion is crucial to achieve small, uniform copolymer particles. This material demonstrates robust heat, weather, and corrosion resistance against acids, alkalis, and various solvents.

Conflicts

  • The presence of high concentrations of emulsifying agents can compromise the polymer's ability to adhere effectively to a substrate during film formation.

Safety

Safety Profile

CIR Status
Safe with restrictions
Max tested
25%
Sensitization risk Low

The CIR Expert Panel deems Ethylene/Acrylic Acid Copolymer safe for cosmetic use under current practices, provided it is formulated to be non-irritating. For leave-on dermal products, a maximum concentration of 25% is reported. While no evidence of sensitization was found, improper formulation can lead to skin irritation.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Ethylene/Acrylic Acid Copolymer is a valuable ingredient, contributing significantly to formulation stability, texture, and product integrity across a wide range of cosmetic applications.

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