Science
Mechanism of Action
This copolymer functions primarily by modulating the rheology of cosmetic solutions, effectively increasing viscosity to create desired textures and consistencies. As a potent emulsion stabilizer, it prevents phase separation, ensuring the integrity and homogeneity of complex formulations. Its film-forming capabilities can contribute to a subtle skin matrix, potentially offering barrier support and enhancing the controlled release and delivery of active ingredients, while also offering some purported skin conditioning benefits for improved hydration.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Concentrations as low as 0.5% have been observed to effectively improve product texture, stabilize emulsions, and suspend ingredients.
- 02 For general cosmetic use, reported maximum concentrations for a similar copolymer (Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer) reach 4.3% in rinse-off applications (e.g., depilatories) and 3.6% in leave-on products (e.g., eyeliner).
- 03 When utilized as a dedicated film-forming or binding agent, concentrations up to 25% have been documented.
Transparency
Dusting Analysis
No data suggests this ingredient is commonly associated with dusting or poses specific dusting concerns in typical cosmetic formulations.
The Formula
Formulation
Stability
This copolymer is readily soluble and dispersible in water, offering versatility in formulation development. It maintains stability across a broad pH range, from 3.0 to 12.0. Similar polymers demonstrate robust stability even with up to 20% oil content in formulations. While generally stable, some related copolymers (e.g., Sodium Acrylate/Acryloyldimethyltaurate/Dimethylacrylamide Crosspolymer) may undergo hydrolysis within the pH range of 4.0 to 9.0, a consideration for specific chemical structures. Film-forming acrylic copolymers typically exhibit broad compatibility with various thickeners, salts, and alcohols.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed the safety of Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer and related acryloyldimethyltaurate polymers for use in cosmetics under current practices and concentrations, provided formulations are non-irritating and residual monomer levels are minimized. European regulations (EU Annex III/66) place restrictions on certain related copolymers containing acrylamide, setting maximum residual acrylamide limits at 0.1 mg/kg for leave-on body cosmetics and 0.5 mg/kg for face and neck products.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This versatile copolymer is a valuable formulation asset, enhancing product aesthetics and stability while offering broad skin compatibility and a favorable safety profile.
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