Overview
Erucamide is a long-chain fatty acid amide derived from erucic acid, a monounsaturated omega-9 fatty acid found in rapeseed oil. It is synthesized via the amidation of erucic acid with ammonia. As a non-toxic, waxy solid, erucamide is prized in polymer processing for its ability to reduce surface friction (slip effect) and prevent adhesion between layers (anti-blocking). Its compatibility with polyolefins like polyethylene (PE) and polypropylene (PP) makes it a staple additive in plastic films, packaging, and injection-molded products. The compound migrates to the polymer surface during cooling, forming a lubricating layer that enhances processing efficiency and product performance.
Physical and Chemical Properties
Erucamide exhibits a melting point range of 79-85°C, typical for fatty acid amides, and remains stable under standard processing temperatures (up to 200°C). Its low volatility ensures minimal loss during extrusion or molding. The compound is insoluble in water but dissolves readily in organic solvents like ethanol, acetone, and chloroform. Key functional groups include the amide (-CONH2) and the long hydrocarbon chain (C22), which contribute to its hydrophobic nature and surface-active properties. The cis-configuration of the double bond at the 13th carbon (Z-13-docosenamide) enhances molecular flexibility, critical for uniform dispersion in polymers.
Main Applications
Erucamide is primarily used as a slip additive in plastic films (e.g., LDPE, LLDPE) to improve handling and reduce coefficient of friction (COF) by up to 50%. In packaging, it prevents layers from sticking together (anti-blocking), especially in high-humidity environments. The additive also serves as a mold release agent for injection-molded parts, reducing defects like tearing. Secondary applications include use in printing inks, adhesives, and rubber compounds to enhance surface smoothness. Food-contact grades (FDA-compliant) are employed in disposable cutlery and food packaging, while industrial grades optimize agricultural films and synthetic fibers.
Safety and Storage
Erucamide is classified as non-hazardous under GHS but may cause mild eye or skin irritation upon prolonged exposure. Dust inhalation should be avoided; use NIOSH-approved respirators in powder-handling areas. Storage recommendations include keeping containers sealed in a ventilated, dry area below 30°C, away from strong oxidizers. Disposal should follow local regulations for organic amides. Spills can be contained with inert absorbents (e.g., sand) and cleaned with soapy water. Suppliers typically provide Material Safety Data Sheets (MSDS) with detailed handling protocols.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 9001 certification and batch-specific COAs (Certificates of Analysis) confirming purity (≥98%) and low acid value (<1 mg KOH/g). Key purchasing criteria include melt point consistency, residual solvent levels, and compliance with FDA 21 CFR or EU 10/2011 for food-contact applications. Bulk purchases (tonnage quantities) often attract discounts of 5-15%. Spot prices fluctuate with rapeseed oil feedstock costs. Just-in-time procurement is advisable due to erucamide’s stable shelf life (2+ years). Sample testing for migration rate and COF reduction is recommended before large orders.
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