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ACRYLATES/STEARYL METHACRYLATE COPOLYMER.

Valuable / EMULSION STABILISING, VISCOSITY CONTROLLING

Acrylates/Stearyl Methacrylate Copolymer is a polymer primarily used for its film-forming and viscosity-controlling properties in skincare. It creates a flexible, water-resistant film, enhancing product feel and ingredient adhesion.

viscosity controlling emulsion stabilising film-forming

Science

This polymer forms a continuous, flexible film on the skin, which helps lock in moisture and provides a smooth after-feel. Its polymeric structure also stabilizes emulsions by preventing oil droplet coalescence.


Research

High confidence
Effective range ≤25%
Optimal

25%

Key findings

  1. 01 Reported as the maximum concentration for leave-on dermal products (face and neck) without causing systemic toxicity or significant irritation.
  2. 02 Clinical testing of Acrylates Copolymers (solids) at this concentration showed they were non-irritating and non-sensitizing in human patch tests.

Transparency

Not commonly dusted

The Formula

Solubility
Both
Optimal pH 3 – 10
0 7 14

Stability

Highly stable across a wide pH range (3-10) and can withstand heating up to 85°C without degradation, often supplied as an aqueous emulsion.

Conflicts

  • High concentrations of electrolytes (salts)
  • Strong oxidizing agents

Safety

CIR Status
Safe as used
Max tested
25%
Sensitization risk Low

CIR has deemed this ingredient safe in current practices, specifically up to 25% for leave-on dermal products when formulated to be non-irritating.


Your Skin

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

Our Assessment

Valuable

This versatile polymer is a valuable ingredient for improving product texture, stability, and delivering enhanced skin hydration through film-forming properties.


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