Science
Mechanism of Action
As a superabsorbent polymer, POLYACRYLATE-40 functions by effectively binding water, establishing a microscopic moisture reservoir on the skin's surface. This action enhances skin hydration and supports its natural moisture equilibrium. With its substantial molecular size and cross-linked architecture, it is designed to remain on the stratum corneum, forming a protective, gel-like film that safeguards against environmental irritants and measurably reduces transepidermal water loss (TEWL). Furthermore, it serves as a versatile rheology modifier, providing viscosity and suspension to cosmetic formulations, and acts as a film-forming agent, imparting a thin, smooth, and soft tactile finish. It also contributes to emulsion stability and acts as a binding agent, with potential for facilitating controlled release of active ingredients.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The sodium salt derivative of polyacrylate-40 exhibits enhanced solubility and pH stability, making it highly adaptable for diverse aqueous formulations. A 10% solution typically maintains a pH between 7 and 9, demonstrating robust stability and functionality within alkaline and high-concentration environments without forming scale sediment.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed that acrylates copolymers, a category encompassing POLYACRYLATE-40 and Sodium Polyacrylate, are safe for use in cosmetics when formulated to be non-irritating. The FDA has similarly approved its use. While POLYACRYLATE-40 itself is not a skin irritant, it is important to ensure formulations contain minimal residual acrylic acid, a manufacturing byproduct. Concentrations exceeding 300 PPM of this residual acid, particularly in highly absorbent materials, have the potential to cause skin irritation.
Your Skin
Skin Compatibility
Our Assessment
Verdict
POLYACRYLATE-40 is a valuable, safe, and versatile ingredient, enhancing skin hydration and barrier function while optimizing product texture and stability across a wide range of formulations.
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