Sodium Acrylate/Sodium Acryloyl Dimethyl Taurate Copolymer is a high-performance synthetic rheology modifier and emulsion stabilizer. It primarily functions to create elegant, non-sticky textures in skincare products while ensuring uniform distribution of oil and water phases.
- INCI Name:
- Sodium Acrylate/Sodium Acryloyl Dimethyl Taurate Copolymer
- Chemical/Scientific Name:
- 2-Propenoic acid, sodium salt, polymer with 2-methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid, monosodium salt
- Common Aliases:
- Sodium Acrylate Copolymer, Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
| Category: | Texture Enhancers |
| Source Origin: | Synthetic |
| Comedogenic Rating: | 0 |
| Primary Industries: | Cosmetics, Personal Care |
| Solubility: | Water-dispersible |
At a Glance: Properties & Effects
| Texture Enhancement: | |
| Formula Stability: | |
| Irritation Risk: |
Primary Benefits:
- Provides a refreshing, “water-break” sensation upon application.
- Stabilizes complex emulsions containing high levels of silicone or oil.
- Improves spreadability and reduces the tackiness of heavy formulas.
- Maintains viscosity across a broad pH range (typically pH 3 to 11).
Potential Risks:
- Minimal risk of irritation; generally considered inert.
- Slight potential for pilling if used in excessive concentrations with other polymers.
Biological Action & Cosmetic Profile
Sodium Acrylate/Sodium Acryloyl Dimethyl Taurate Copolymer operates as a pre-neutralized polymer that swells instantly in Aqua. Unlike traditional carbomers that require a neutralizing base like Sodium Hydroxide or Triethanolamine to thicken, this copolymer is ready to use. It forms a micro-gel network that traps oil droplets, preventing coalescence and phase separation. This mechanical stabilization allows for the creation of “cream-gels” that feel lightweight and cooling despite containing significant emollient content.The polymer exhibits shear-thinning behavior, which is a critical trait for cosmetic elegance. When applied to the skin, the mechanical pressure of rubbing breaks the gel structure temporarily, allowing the product to glide effortlessly. Once the pressure is removed, the polymer quickly recovers its structure, providing a smooth, film-forming finish. This film helps to reduce transepidermal water loss (TEWL) subtly, although its primary purpose remains sensory rather than occlusive.
Broader Applications & Origins
Manufacturers frequently supply this ingredient as part of a multi-component blend, such as SEPIPLUS™ 400 or SIMULGEL™ EG. These commercial mixtures often combine the copolymer with Isohexadecane and Polysorbate 80 to facilitate cold-process emulsification. By eliminating the need for heat during production, formulators can incorporate heat-sensitive Active Substances, such as certain vitamins or botanical extracts, without compromising their efficacy.
Routine Integration
Synergies:
- Glycerin: Enhances the humectant properties and smoothness of the gel network.
- Dimethicone: Works efficiently to stabilize silicone-in-water emulsions for a velvety finish.
- Trideceth 6: Often found in combination to improve the dispersion of the polymer in liquid formulations.
Conflicts:
- High Salt/Electrolyte Concentrations: Excessive levels of electrolytes (e.g., Sodium Ascorbyl Phosphate or certain mineral salts) can cause the polymer network to collapse, leading to a significant loss in viscosity.
Clinical Consensus & Safety
The Cosmetic Ingredient Review (CIR) Expert Panel evaluated Sodium Acrylate/Sodium Acryloyl Dimethyl Taurate Copolymer and concluded it is safe for use in cosmetic formulations. Because of its high molecular weight, the polymer is too large to penetrate the skin barrier, effectively eliminating systemic toxicity concerns. Clinical patch testing has consistently demonstrated that the ingredient is non-sensitizing and non-irritating at standard usage levels, which typically range from 0.5% to 3.0%. Research indexed in PubMed supports its role in improving the skin’s sensory perception of topical treatments without interfering with the penetration of active ingredients.
Is this ingredient a microplastic?
While it is a synthetic polymer, its classification under microplastic regulations varies by jurisdiction. In the EU, liquid or gel-form polymers that do not exist as solid particles in the final product are currently treated differently than solid plastic microbeads.
Does it cause skincare products to pill?
Pilling can occur if the copolymer is layered with high concentrations of other film-formers or if the product has not been formulated with sufficient emollients. When used correctly, it typically creates a smooth, cohesive layer.
Is it safe for acne-prone skin?
Yes. This ingredient has a comedogenic rating of 0. It is a non-oily thickening agent that provides moisture without clogging pores or contributing to sebum-related congestion.