Ethylene bis(stearamide) (EBS) is a synthetic wax derived from stearic acid and ethylenediamine. It is a hard, high-melting point, non-ionic compound characterized by its excellent internal and external lubricating properties. EBS is typically supplied as a fine, white powder or flakes.
EBS functions as a processing aid in a wide range of plastics and elastomers, including PVC, polyethylene, polypropylene, polystyrene, ABS, nylon, and thermoplastic elastomers (TPEs). It is used as a lubricant, mold release agent, and anti-blocking agent.
Properties:
- High melting point (typically between 140-148°C)
- Insoluble in water
- Soluble in some organic solvents at elevated temperatures
- Excellent lubricity
- Good thermal stability
- Non-toxic and chemically inert
Applications:
- Plastics processing: Used as an internal and external lubricant to reduce friction and improve processing characteristics during extrusion, injection molding, and calendaring. Facilitates mold release and enhances surface finish.
- Rubber processing: Acts as a mold release agent and lubricant in rubber compounds.
- Coatings: Used as a slip agent and anti-blocking agent in coatings and inks.
- Adhesives: Enhances the slip and release properties of adhesives.
- Textiles: Used as a lubricant and softening agent in textile processing.
- Paper: Improves the slip properties of paper and paperboard.
Safety and Handling:
Ethylene bis(stearamide) is generally considered to be non-toxic and safe to handle. However, as with any fine powder, dust inhalation should be avoided. Safety data sheets (SDS) should be consulted for specific handling and safety precautions.