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ACRYLATES/PEG-4 DIMETHACRYLATE CROSSPOLYMER.

Valuable CAS 50657-38-0 / FILM FORMING

This crosslinked polymer functions as a versatile film-former and viscosity controller, improving formula stability and skin feel. It forms a breathable, non-occlusive film that can aid in controlled release and sebum absorption.

viscosity controlling film forming polymeric emulsifier thickener sebum absorption

Science

It creates a porous, crosslinked film on the skin surface, enhancing formula stability and delivering a smooth sensory feel. This structure supports controlled release of actives or sebum absorption while simultaneously increasing viscosity.


Research

High confidence
Effective range 0.1–2%
Optimal

N/A

Key findings

  1. 01 Clinical data indicate typical use concentrations between 0.1% and 2.0% effectively provide sensory benefits as a polymeric emulsifier and thickener.
  2. 02 Studies support its lack of sensitization at high concentrations (up to 25%), provided formulations are non-irritating.

Transparency

Not commonly dusted

The Formula

Solubility
Both
Optimal pH 5 – 8
0 7 14

Stability

Stable at room temperature, it exhibits pH-dependent solubility, optimally thickening between pH 5.0 and 8.0. Neutralization with a base is often required for ideal viscosity and clarity.

Conflicts

  • High concentrations of electrolytes/salts (can cause viscosity loss)
  • Strongly acidic environments (pH < 4.5 can lead to precipitation or thinning)
  • Cationic surfactants

Safety

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

The CIR Expert Panel found it safe for use when properly formulated to be non-irritating. Its large polymer size leads to negligible dermal absorption, minimizing systemic toxicity risk.


Your Skin

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

Our Assessment

Valuable

This versatile polymer is valuable for enhancing formulation stability, improving skin feel across all skin types, and providing film-forming and viscosity control benefits with a low risk of irritation.


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