Polyacrylate-11 is a high-performance synthetic film-former and stabilizer utilized to improve the sensory profile and longevity of cosmetic products. It creates a breathable, flexible barrier on the skin that enhances water resistance and provides a smooth, non-tacky finish.
- INCI Name:
- Polyacrylate-11
- Chemical/Scientific Name:
- Synthetic polymer consisting of acrylic acid, methacrylic acid or one of their simple esters.
- Common Aliases:
- Syntran PC 5100
| Category: | Texture Enhancers |
| Source Origin: | Synthetic |
| Comedogenic Rating: | 0 |
| Primary Industries: | Skin Care, Color Cosmetics, Sun Protection |
| Solubility: | Water-dispersible |
At a Glance: Properties & Effects:
| Texture Enhancement | |
| Formula Stability | |
| Irritation Risk |
- Primary Benefits:
- Creates a uniform, flexible film on the skin surface to prevent transepidermal water loss.
- Reduces the tackiness often associated with high-SPF sunscreens or heavy moisturizers.
- Improves the wear time and rub-resistance of foundations and concealers.
- Potential Risks:
- Generally considered inert with an extremely low risk of sensitization or irritation.
Biological Action & Cosmetic Profile:
Polyacrylate-11 functions as a sophisticated rheology modifier and film-forming agent. Unlike traditional thickeners that may leave a heavy or sticky residue, this polymer is engineered to offer a “soft-touch” effect. Upon application, the polymer chains orient themselves to form a continuous, cohesive layer. This layer serves as a physical matrix that can suspend pigments or UV filters, ensuring an even distribution across the skin’s micro-relief.The macromolecular structure of Polyacrylate-11 prevents it from penetrating the stratum corneum. Because the molecule is too large to enter the skin, it remains on the surface, making it an excellent candidate for sensitive skin formulations. Its primary chemical role involves stabilizing emulsions by increasing the viscosity of the continuous phase, which prevents the coalescence of oil droplets. This contributes to a more robust shelf life and consistent product performance over time.In sun care applications, the film-forming properties are particularly valuable. This ingredient helps maintain the integrity of UV filters against sweat and water exposure. By providing a hydrophobic barrier, it ensures that active sun-blocking agents remain in place, thereby maintaining the labeled SPF protection during physical activity or humidity.
Broader Applications & Origins:
While primarily known for its role in skin care, Polyacrylate-11 is widely used in the professional hair care industry to provide hold and humidity resistance in styling products. Its synthetic origin allows for high purity and batch-to-batch consistency, which is often difficult to achieve with natural gums or starches. Manufacturers favor this polymer because it remains stable across a broad pH range and is compatible with a wide variety of cosmetic actives, including Glycerin and various Dimethicone derivatives.
Routine Integration:
- Synergies:
- Works effectively with Hyaluronic Acid to seal in moisture after application.
- Enhances the spreadability of Titanium Dioxide and Zinc Oxide in mineral sunscreens.
- Pairs well with Silica for advanced oil-control and mattifying effects.
Clinical Consensus & Safety:
The Cosmetic Ingredient Review (CIR) Expert Panel has evaluated the safety of cross-linked alkyl acrylates, including various polyacrylate polymers. The consensus indicates that these ingredients are safe for use in cosmetics when formulated to be non-irritating. Because Polyacrylate-11 is a high-molecular-weight polymer, it lacks the biological activity to cause systemic toxicity or localized irritation under normal conditions. It is frequently categorized as a “low hazard” ingredient in international regulatory databases, including CosIng and the ECHA.
Is Polyacrylate-11 a microplastic?
While Polyacrylate-11 is a synthetic polymer, its classification as a microplastic depends on the specific physical form (solid vs. liquid) and regional regulatory definitions. In most cosmetic formulations, it is used in a dissolved or dispersed state rather than as solid particles.
Does it clog pores?
No, Polyacrylate-11 is non-comedogenic. Its large molecular size ensures it stays on the surface of the skin without entering the pores or interfering with sebum production.
Is it safe for sensitive skin?
Yes, this ingredient is typically used in hypoallergenic formulas because it is chemically inert and does not react with the skin barrier.