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ACRYLIC ACID/ETHYLTRIMONIUM CHLORIDE METHACRYLATE COPOLYMER.

Valuable / ANTISTATIC, HAIR CONDITIONING, HAIR FIXING, SKIN CONDITIONING

ACRYLIC ACID/ETHYLTRIMONIUM CHLORIDE METHACRYLATE COPOLYMER is a multifunctional polymer engineered to enhance formulation stability, product texture, and skin feel. It primarily acts as a film-forming and skin-conditioning agent, contributing to a smooth skin surface and augmenting a formulation's water resistance.

Summary

Antistatic Hair Conditioning Hair Fixing Skin Conditioning Film-forming Thickening agent Adhesive Suspending agent Water-resistance enhancer

Science

Mechanism of Action

This copolymer operates by forming a flexible, non-occlusive film or barrier on the skin's surface, which imparts a smooth tactile sensation and enhances the water resistance of a formulation. Beyond its film-forming capabilities, it serves as an effective thickening, adhesive, and suspending agent, ensuring optimal product consistency and stability. Additionally, it provides antistatic properties and conditions both skin and hair.

Research

Clinical Evidence

Medium confidence
Effective range 0.5–25%
Optimal

N/A

Key findings

  1. 01 Clinical evaluations for the broader family of acrylates copolymers indicate effective concentrations ranging from 0.5% (for viscosity, suspending, or emulsion stabilization) up to 25% (for binding, film-forming, or fixative applications). Formulations utilizing these copolymers are critical to be designed as non-irritating.
  2. 02 A distinct, yet chemically related, bioadhesive block copolymer (Dimethylacrylamide/Acrylic acid/Polystyrene Ethyl Methacrylate Copolymer) demonstrated a significant increase in skin moisture, up to approximately three times baseline, within one hour of application. This effect was observed during an 8-hour single application test and was accompanied by robust bio-adhesion lasting over 24 hours.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 6.3 – 8
0 7 14

Stability

General acrylates copolymers, including this variant, perform optimally within a pH range of 6.3 to 8.0 for thickening, with sustained activity up to a pH of 11. Similar copolymer structures also exhibit broad pH stability compatible with dermatological applications.

Safety

Safety Profile

CIR Status
Safe as used with restrictions
Sensitization risk Low

The CIR Expert Panel has concluded that a broad group of 126 acrylates copolymers, including those containing acrylic acid and methacrylic acid monomers, are safe for use in cosmetics under current practices and concentrations, provided formulations are designed to be non-irritating. Strict adherence to monomer limits is advised: acrylamide concentrations in cosmetic formulations should not exceed 5 ppm, and residual acrylic acid should remain below 1500 ppm (typically ranging from 10 to 1000 ppm). Elevated concentrations of acrylates copolymers may lead to irritation.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

This versatile copolymer is a valuable component for enhancing product texture, stability, and skin feel across various formulations, provided it is precisely formulated within recommended non-irritating parameters.

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References

Sources