Polyacrylate-17

Polyacrylate-17 is a synthetic polymer used primarily as a thickener/film-former and stabilizer, typically at low concentrations (about <1–5%) in leave-on and rinse-off products. As a high–molecular weight, non-volatile polymer, it has minimal skin penetration and is generally associated with very low rates of irritant reactions in patch testing, with true allergy being uncommon. In severely compromised barriers (e.g., active eczema), the main risk is mild mechanical/occlusive-related stinging rather than intrinsic chemical irritation, so it remains very gentle but not completely inert. Safety Notes: Polyacrylate-17 is a synthetic polymer rheology modifier/film former typically used at low levels in leave-on emulsions, serums, and sunscreens to build viscosity and stabilize dispersed phases; commercial products commonly start around ~0.05–0.2% when it’s part of a broader thickener system. Higher-strength consumer products such as gel-creams, primers, setting/film-forming skincare, and high-viscosity styling-type skincare gels can push total Polyacrylate-17 into the ~1–3% range to deliver pronounced gel structure and film properties (generally higher in leave-on than rinse-off). It is not specifically concentration-restricted by major cosmetic regulations, with practical upper limits driven by aesthetics (tack/drag), clarity, and compatibility with electrolytes and other polymers rather than regulatory caps.