Stearyl Acrylate, chemically known as Octadecyl Acrylate (CAS 4813-57-4), is more than just a chemical compound; it's a performance enhancer in the world of polymers. As a manufacturer specializing in this advanced monomer, we understand the science that drives its utility. This article delves into the molecular structure and properties that make Stearyl Acrylate a sought-after ingredient for formulators and scientists seeking to optimize their polymer systems.

At its core, Stearyl Acrylate is an ester formed from stearyl alcohol and acrylic acid. The critical functional component is the acrylate group (CH2=CH-COO-), which is highly reactive and readily undergoes polymerization. This group allows Stearyl Acrylate to co-polymerize with a vast array of other vinyl monomers, including acrylates, methacrylates, styrene, and vinyl acetate, forming copolymers with tailored properties. When you purchase this from a reputable supplier, you are buying into this inherent polymerizability.

The distinctive feature, however, is the long, hydrophobic octadecyl (C18) alkyl chain attached to the acrylate moiety. This long hydrocarbon tail significantly influences the physical properties of the resulting polymers. Key effects include:

  • Increased Flexibility and Reduced Brittleness: The long, flexible alkyl chains act as internal plasticizers, lowering the glass transition temperature (Tg) of the polymer. This results in materials that are less brittle and more pliable, even at lower temperatures.
  • Enhanced Hydrophobicity and Water Resistance: The non-polar nature of the long alkyl chain repels water, imparting excellent water resistance to the polymers. This is crucial for applications like outdoor coatings, sealants, and water-repellent finishes.
  • Improved Surface Properties: Polymers incorporating Stearyl Acrylate often exhibit improved surface slip, reduced friction, and enhanced lubricity. This makes them suitable for applications requiring good surface characteristics, such as certain types of adhesives or modifiers.
  • Lower Volatility: Compared to shorter-chain acrylates, the higher molecular weight of Stearyl Acrylate contributes to lower volatility, which is beneficial for processing safety and environmental considerations.

These properties translate into diverse applications. In the adhesives industry, Stearyl Acrylate contributes to the creation of pressure-sensitive adhesives with excellent tack and flexibility. In coatings, it enhances film formation, gloss, and outdoor durability. For product formulators, understanding these structure-property relationships is key to leveraging Stearyl Acrylate effectively. As a dedicated manufacturer, we ensure that our Stearyl Acrylate meets the stringent purity requirements necessary to realize these benefits. We invite R&D scientists to explore the potential of this versatile monomer for their novel material development. Contact us for detailed specifications and to discuss how our Octadecyl Acrylate can elevate your product performance.