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STYRENE/ACRYLATES/AMMONIUM METHACRYLATE COPOLYMER.

Valuable / FILM FORMING, OPACIFYING

STYRENE/ACRYLATES/AMMONIUM METHACRYLATE COPOLYMER is a synthetic polymer designed to form a continuous, ultra-thin, and water-resistant film on the skin. This film provides robust barrier protection against external aggressors, while also enhancing product texture and stability.

Summary

Film-forming agent Opacifying agent Water-binding Barrier protection Pigment binding

Science

Mechanism of Action

Operating as a sophisticated film-forming agent, STYRENE/ACRYLATES/AMMONIUM METHACRYLATE COPOLYMER creates a flexible, cohesive, and water-resistant layer on the skin's surface. This hydrophobic film acts as a physical barrier, bolstering the skin's resilience against environmental stressors such as chemicals, UV radiation, and pollution. Furthermore, the formed layer exhibits water-binding capabilities, contributing to improved epidermal hydration, and acts as an opacifying agent to reduce light permeability in formulations. Its excellent pigment-binding characteristics also enhance the durability and performance of cosmetic products.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

This copolymer is soluble in water under specific conditions. For optimal adhesion and cohesion, particularly in makeup formulations, it is frequently combined with ingredients such as butylene glycol and sodium laureth sulfate.

Synergies

  • butylene glycol
  • sodium laureth sulfate

Safety

Safety Profile

CIR Status
Safe with restrictions
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel considers this ingredient safe for cosmetic use, primarily due to its large molecular weight which limits skin absorption. A critical concern is the potential for residual styrene contamination, a possible carcinogen, which must be minimized in compliant grades. Products containing this ingredient may be subject to specific use restrictions and warnings to ensure safety and prevent such contamination. Studies on a related 30% Ammonium Acrylates Copolymer mixture have indicated it to be practically non-irritant.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

This ingredient is valuable for its multifunctional role in creating protective, water-resistant films and enhancing cosmetic formulations, provided that residual styrene levels are rigorously controlled in compliance with safety standards.

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