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Moumoujus

ACRYLATES/BEHENETH-25 METHACRYLATE COPOLYMER.

Valuable / VISCOSITY CONTROLLING

A hydrophobically modified alkali-soluble emulsion (HASE) polymer, this ingredient functions primarily as a rheology modifier and emulsion stabilizer in skincare formulations. It helps achieve desired product texture and maintains emulsion integrity.

Summary

viscosity controlling emulsion stabilising rheology modifier

Science

Mechanism of Action

In acidic conditions, polymer chains are coiled. Upon neutralization, carboxylic groups ionize and repel, causing swelling, uncoiling, and forming a 3D network via hydrophobic associations, effectively increasing viscosity and stabilizing emulsions.

Research

Clinical Evidence

High confidence
Effective range 0.05–1.7%
Optimal

1.7%

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 5.5 – 8
0 7 14

Stability

Supplied as a low-viscosity emulsion, it requires neutralization (e.g., Sodium Hydroxide) to trigger its thickening properties. Below pH 5.5, it typically remains inactive as a thickener.

Conflicts

  • High concentrations of electrolytes/salts
  • Strongly acidic environments (below pH 5.0)
  • Cationic ingredients

Safety

Safety Profile

CIR Status
Safe as used
Max tested
1.7%
Sensitization risk Low

The CIR Expert Panel concluded it is safe when formulated to be non-irritating. Good Manufacturing Practices (GMP) are crucial to minimize residual monomers and solvents.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

This versatile HASE polymer is a valuable ingredient for controlling product texture and enhancing emulsion stability across various skincare formulations, demonstrating a high safety profile.

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References

Sources