This synthetic polymer functions as a high-performance rheology modifier, stabilizer, and emulsifier in cosmetic formulations. It is primarily utilized to create “cream-gel” textures that offer a fresh, melting sensation upon skin contact without leaving a greasy residue.
- INCI Name:
- Sodium Acryloyldimethyl Taurate Copolymer
- Chemical/Scientific Name:
- Sodium 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonate polymer
- Common Aliases:
- ATBS Copolymer, Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
| Category: | Texture Enhancers, Stabilizers, Thickeners |
| Source Origin: | Synthetic |
| Comedogenic Rating: | 0 |
| Primary Industries: | Cosmetics, Dermatology, Personal Care |
| Solubility: | Water-dispersible |
At a Glance: Properties & Effects
| Texture Enhancement: | |
| Formula Stability: | |
| Hydration/Moisture: | |
| Irritation Risk: |
- Primary Benefits: Superior emulsification of oils, provides a “break-on-skin” watery texture, stabilizes formulas across a wide pH range (4.0 to 12.0), and improves the spreadability of sunscreens and heavy creams.
- Potential Risks: Low risk of sensitivity; potential for pilling if used at excessively high concentrations or layered with incompatible silicones.
Biological Action & Cosmetic Profile
Sodium Acryloyldimethyl Taurate Copolymer operates through a mechanism of hydrothermal swelling. When dispersed in Aqua, the polymer chains expand to form a micro-gel network. This structure effectively traps oil droplets and suspended solids, preventing coalescence and phase separation in O/W (oil-in-water) emulsions. Because it is a pre-neutralized polymer, it does not require the addition of a base like Sodium Hydroxide or Triethanolamine to reach its maximum viscosity, which simplifies the manufacturing process and ensures formula consistency.
The sensory profile of this ingredient is characterized by its “melting” effect. Unlike traditional carbomers which can feel sticky or tacky, this taurate-based copolymer releases its water phase immediately upon friction. This provides an instantaneous cooling sensation. It is frequently employed in formulations containing Squalane, Isohexadecane, or Glycerin to create lightweight, elegant textures that appeal to users with oily or combination skin types.
From a structural standpoint, the polymer exhibits high electrolyte tolerance compared to standard polyacrylate thickeners. This trait allows it to maintain viscosity in the presence of ionized active ingredients, such as certain forms of Ascorbic Acid or mineral salts. It also functions as a secondary emulsifier, allowing formulators to reduce the concentration of traditional surfactants like Polysorbate 60, which can sometimes lead to skin barrier disruption in sensitive individuals.
Broader Applications & Origins
This ingredient is a synthetic creation born from advanced polymer chemistry. It belongs to a family of sulfonic acid-based polymers designed to overcome the limitations of natural gums (like Xanthan Gum) which can be prone to microbial contamination and inconsistent texture. In modern cosmetic science, it is often supplied in a concentrated liquid form, pre-dispersed in an oil phase like Hydrogenated Polyisobutene, which allows for cold-process manufacturing—a more sustainable, energy-efficient method of producing skincare.
Routine Integration
- Synergies: Works exceptionally well with Sodium Hyaluronate for enhanced slip, and supports the stability of Retinol and Niacinamide in complex anti-aging serums.
- Conflicts: High concentrations of divalent salts (like calcium or magnesium) may slightly reduce the viscosity of the gel network, though it remains more robust than most competitors.
Clinical Consensus & Safety
The Cosmetic Ingredient Review (CIR) Expert Panel has evaluated acryloyldimethyltaurate polymers and concluded they are safe for use in cosmetics. Clinical data indicates that Sodium Acryloyldimethyl Taurate Copolymer is neither a primary irritant nor a sensitizer when tested in human repeat insult patch tests (HRIPT). Its high molecular weight prevents it from penetrating the stratum corneum, ensuring that its biological activity is limited strictly to the skin’s surface as a film-former and moisture-locking agent. It is considered non-comedogenic and suitable for acne-prone skin due to its ability to create oil-free gel structures.
Is this ingredient a microplastic?
While it is a synthetic polymer, Sodium Acryloyldimethyl Taurate Copolymer is typically used in a soluble or “swollen” gel state. Current ECHA (European Chemicals Agency) definitions regarding microplastics focus primarily on solid, non-biodegradable particles. However, as it is a liquid-phase polymer, it is generally not classified under the “microplastic bead” bans targeting exfoliating particles.
Does it cause pilling?
Pilling usually occurs if the polymer film is disturbed before it has fully set, or if it is layered over heavy, silicone-rich products. To prevent pilling, allow serums containing this copolymer to dry completely before applying thick oils or occlusive balms.