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ACRYLIC ACID/STEARYL ACRYLATE COPOLYMER.

Valuable CAS 36120-03-3 / EMULSION STABILISING, FILM FORMING

ACRYLIC ACID/STEARYL ACRYLATE COPOLYMER is a versatile synthetic polymer utilized in precision skincare to enhance product integrity and performance. It effectively stabilizes emulsions, preventing ingredient separation, and forms a beneficial film on the skin's surface. This ingredient also contributes to desired textural properties in formulations.

Summary

Emulsion Stabilising Film Forming Thickening Agent

Science

Mechanism of Action

This copolymer functions by creating a continuous, transparent film when applied to the skin, hair, or nails. This film layer can improve water resistance, facilitate the prolonged adherence of active ingredients, and provide a perceptibly smoother and softer skin feel. Furthermore, it acts as an emulsion stabilizer, supporting the formation of stable mixtures of immiscible liquids, and serves as a thickening agent to adjust the viscosity and overall texture of cosmetic formulations.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 Clinical evaluations using a related ingredient, Acrylates Copolymer, at 30% solids, confirmed its non-irritating and non-sensitizing profile.
  2. 02 A human repeated insult patch test (HRIPT) involving 47 subjects further demonstrated that a 25% aqueous dilution of Acrylates Copolymer, a related ingredient, was neither an irritant nor a sensitizer.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH N/A
0 7 14

Safety

Safety Profile

CIR Status
Safe with restrictions
Max tested
25%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has deemed ACRYLIC ACID/STEARYL ACRYLATE COPOLYMER and related acrylates copolymers safe for cosmetic use, provided they are formulated to be non-irritating. The maximum reported concentration for leave-on dermal products is 25%. Additionally, industry guidelines recommend ensuring that the concentration of residual acrylamide monomer in cosmetic formulations does not exceed 5 ppm.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

ACRYLIC ACID/STEARYL ACRYLATE COPOLYMER is a valuable ingredient primarily for its robust emulsion stabilizing and film-forming properties, contributing to product efficacy and skin feel, with a low risk of irritation when properly formulated.

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