Meaning
Saturated fatty acid amides provide long-term surface lubricity for high-temperature extrusion and moulding processes. Behenamide functions as a slip agent with a high melting point, typically used where processing temperatures exceed the limits of oleamide or stearamide. Its molecular structure consists of a long twenty-two carbon chain that remains stable under intense thermal stress.
This stability prevents the additive from degrading or causing discoloration during the manufacturing of parts. It is commonly incorporated into engineering resins and polyolefins that require high heat for proper flow.
Thermal Stability
Heat resistance distinguishes this molecule from other primary amides used in the plastics industry. Most slip agents begin to smoke or lose effectiveness when the melt temperature reaches two hundred degrees Celsius. Because behenamide has a higher molecular weight, it remains functional at elevated temperatures.
This allows for the production of thin-walled parts without the risk of yellowing or surface defects.
Surface Migration
Diffusion toward the exterior of a part occurs more slowly than with shorter-chain amides. The slip effect is not immediate but develops as the material cools and reaches its final crystalline state. A moulder uses this additive to provide a consistent finish that does not feel excessively greasy.
It stays within the matrix longer, providing durable friction reduction over the shelf life of the product.
Industrial Usage
Heavy-duty automotive components and industrial films often utilize this specific grade of slip agent. It helps in the release of large parts from complex tooling where friction could cause warping or stress marks. The additive also improves the scratch resistance of the finished surface.
Since it does not interfere with the base resin properties, it is suitable for demanding structural applications.
