A high-performance synthetic polymer that transforms water-based formulas into elegant, non-greasy cream-gels. It provides a unique melting sensation upon application while ensuring the long-term stability of emulsions.
- 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: | Skincare, Haircare, Sun Care |
| Solubility: | Water-soluble |
At a Glance: Properties & Effects
| Texture Enhancement | |
| Formula Stability | |
| Irritation Risk |
Primary Benefits:
- Creates a refreshing, “quick-break” skin feel that transitions from a gel to a watery fluid upon contact.
- Stabilizes oil-in-water emulsions without the need for additional co-emulsifiers.
- Provides excellent clarity in transparent aqueous gels.
- Maintains compatibility with organic solvents like Alcohol Denat.
Potential Risks:
- Highly sensitive to electrolytes; viscosity will drop significantly if paired with high-salt actives.
- Incompatible with formulations requiring a very low pH (typically below pH 4.0).
Biological Action & Cosmetic Profile
As a synthetic sulfonic acid polymer, this molecule forms a robust three-dimensional network when dispersed in Aqua. Unlike a traditional Carbomer, which requires external neutralization by bases such as Sodium Hydroxide or Triethanolamine to build viscosity, this copolymer is pre-neutralized. It swells instantly upon hydration, effectively trapping water and oil droplets within its micro-gel matrix to maintain a homogeneous mixture.
Viscosity control represents only one facet of its utility; the sensorial profile is what distinguishes it from other thickeners. Skin contact triggers a slight structural breakdown of the polymer network due to the presence of natural salts on the human epidermis. This “salt-sensitivity” facilitates an immediate release of water and active ingredients, providing a cooling, hydrating sensation often described as “weightless” or “non-tacky.”
Formulators favor this ingredient for oil-in-water emulsions where a matte finish is desired. It can stabilize up to 15-20% oil phase by creating a protective barrier around oil droplets, preventing coalescence. Because it does not rely on traditional surfactants for stabilization, it is frequently used in products designed for sensitive skin to minimize the risk of surfactant-induced irritation.
Routine Integration
Synergies:
- Humectants like Glycerin and Panthenol improve the spreadability and hydrating duration of the gel network.
- Non-ionic actives such as Niacinamide integrate seamlessly without disrupting the polymer structure.
- Silicones, including Dimethicone, work well to enhance the silky after-feel.
Conflicts:
- Electrolytes and salts, such as Magnesium Sulfate or Sodium Pca, will cause the gel to collapse into a watery liquid.
- Ionic forms of Vitamin C, specifically Sodium Ascorbyl Phosphate, can compromise the thickness of the formula.
Clinical Consensus & Safety
The Cosmetic Ingredient Review (CIR) Expert Panel evaluated the safety data for Ammonium Acryloyldimethyltaurate/VP Copolymer and concluded it is safe for use in cosmetic products. Clinical studies indicate that the large molecular weight of the copolymer prevents it from penetrating the skin barrier, significantly reducing the potential for systemic absorption or localized irritation. It is classified as non-sensitizing and non-phototoxic, making it a staple in formulations for reactive skin types.
Is this ingredient a microplastic?
No, it is a water-soluble polymer and does not fall under the typical regulatory definition of solid microplastic particles used for exfoliation or opacifying.
Why does my cream feel like it turns to water when I rub it in?
This effect is caused by the polymer reacting to the natural salts on your skin. It is a deliberate design choice by formulators to ensure the product feels lightweight and absorbs quickly.
Is it safe for acne-prone skin?
Yes. It has a comedogenic rating of 0, meaning it does not clog pores. It is often used in “oil-free” gel moisturizers specifically formulated for oily and acne-prone skin.