A high-performance synthetic polymer primarily utilized as a rheology modifier and emulsion stabilizer. It creates elegant, “quick-break” textures that melt upon skin contact, delivering a fresh, velvety, and non-sticky sensory profile.
- INCI Name:
- Ammonium Acryloyldimethyltaurate/VP Copolymer
- Chemical/Scientific Name:
- 2-Methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid monosodium salt polymer with 1-ethenyl-2-pyrrolidinone
- Common Aliases:
- Aristoflex AVC
| Category: | Texture Enhancers |
| Source Origin: | Synthetic |
| Comedogenic Rating: | 0 |
| Primary Industries: | Cosmetics, Dermatology, Hair Care |
| Solubility: | Water-dispersible |
At a Glance: Properties & Effects
| Texture Enhancement | |
| Formula Stability | |
| Soothing/Calming | |
| Irritation Risk |
- Primary Benefits: Creates non-greasy gel-creams, stabilizes oils without surfactants, provides a cooling sensation, and enhances spreadability.
- Potential Risks: High sensitivity to electrolytes (salts) which can cause the formula to liquefy.
Biological Action & Cosmetic Profile
Synthetic polymers of this class function as sophisticated rheology modifiers that dictate the flow and feel of topical products. This specific copolymer is pre-neutralized, meaning it requires no additional pH adjustment to reach its maximum thickening capacity. Formulators frequently select it for its ability to create crystal-clear aqueous gels and stable oil-in-water emulsions with a unique “melting” skin feel.
The molecular framework consists of a cross-linked network that swells significantly when dispersed in Aqua. Electrostatic repulsion between the negatively charged sulfonic acid groups forces the polymer chains to expand into a three-dimensional lattice. This structure effectively “traps” oil droplets or pigments, acting as a pseudo-emulsifier that can stabilize up to 15% oil phase without the need for traditional, potentially irritating surfactants.
Dermatological application triggers a “quick-break” effect, a hallmark of this ingredient’s sensory profile. Contact with the natural electrolytes and salts present on human skin causes the expanded polymer network to collapse. This instantaneous phase transition releases the internal water and active ingredients, such as Glycerin or Acetyl Hexapeptide 8, providing an immediate cooling sensation followed by a weightless, matte finish.
Stability remains high across a broad pH range of 4.0 to 9.0, making it compatible with acidic actives like Ascorbic Acid. However, the presence of ions is a critical limitation. Ingredients with high electrolyte content, such as certain botanical extracts or Sodium Ascorbyl Phosphate, can diminish the viscosity of the gel, requiring careful formulation balance.
Routine Integration
- Synergies: Works optimally with humectants like Glycerin and other stabilizers like Xanthan Gum to create robust textures. It is often paired with Pvp in hair styling products to improve film-forming properties.
- Conflicts: Formulations containing high concentrations of sodium chloride, sea salt, or highly ionic minerals may cause the polymer to lose its thickening ability and “thin out” into a liquid.
Clinical Consensus & Safety
The Cosmetic Ingredient Review (CIR) Expert Panel concluded in their 2017 safety assessment that acryloyldimethyltaurate polymers are safe for use in cosmetics. Scientific data demonstrates that the large molecular weight of the copolymer prevents significant skin penetration, limiting systemic exposure. In clinical patch testing, the ingredient showed no evidence of being a primary irritant or a sensitizer, even at 100% concentration, confirming its suitability for sensitive skin types.
Is this ingredient safe for acne-prone skin?
Yes. It has a comedogenic rating of 0 and is non-occlusive. Because it allows for the creation of oil-free or low-oil gel textures, it is a preferred choice for lightweight moisturizers designed for oily and acne-prone skin.
Does it cause “pilling” when layered with other products?
While the polymer forms a thin film on the skin, pilling is generally uncommon unless the product contains an excessive amount of the ingredient or is applied over a heavy, oil-based serum that prevents proper adhesion to the skin surface.
Is it considered a microplastic?
Under current ECHA definitions, water-soluble or water-dispersible liquid polymers like this copolymer are typically not classified as solid microplastic particles. It is synthetic, but it functions differently than the solid plastic beads used as exfoliants.