Overview
Fusabond is a commercial line of polymer modifiers developed to improve adhesion between incompatible materials, such as polyolefins and fillers or polar polymers. Manufactured by Dow Chemical Company, it acts as a coupling agent through functional groups (e.g., maleic anhydride) grafted onto polymer backbones. These additives are critical in composite manufacturing, where interfacial bonding determines product performance. Fusabond grades are tailored for specific matrices, including polyethylene (PE), polypropylene (PP), and ethylene-vinyl acetate (EVA). Their use reduces delamination and enhances mechanical strength in end products.
Physical and Chemical Properties
Fusabond modifiers exhibit thermoplastic behavior with melt flow indices (MFI) ranging from 1.5 to 20 g/10 min, depending on the grade. Their functional groups (e.g., maleic anhydride content: 0.5–2.5 wt%) enable covalent bonding with polar substrates like glass fibers or nylon. Thermal stability typically spans 200–250°C, making them suitable for extrusion and injection molding. The materials are non-reactive at room temperature but activate during processing. Compatibility tests with base polymers are recommended, as excessive loading can affect viscosity or cause gelation.
Main Applications
In automotive composites, Fusabond bonds polyolefins to talc or wood fibers for lightweight interior panels. For packaging, it improves laminate adhesion in multi-layer films (e.g., PE/PA structures). Construction applications include wood-plastic composites (WPCs) for decking, where it enhances moisture resistance. The E-series targets polyolefin-based composites, while M-series modifiers optimize adhesion in engineering plastics. Recent developments include flame-retardant grades for electrical enclosures. Dosages typically range from 1–5 wt% of the total formulation.
Safety and Storage
Fusabond poses low toxicity but requires standard polymer-handling precautions. Dust inhalation should be avoided via local exhaust ventilation. Spills are non-hazardous and can be swept up; solvents are unnecessary. Storage in sealed containers prevents moisture absorption, which may affect processing. Shelf life exceeds 24 months under recommended conditions. Safety data sheets (SDS) for specific grades should be consulted for disposal guidelines, though incineration with energy recovery is commonly approved.
B2B Procurement Guide
Procure Fusabond through authorized distributors or directly from manufacturers. Key specifications include melt flow rate, functional group content, and base polymer compatibility. Bulk purchases (palletized or supersacks) often reduce costs by 10–15% compared to small-quantity orders. Sample testing is advised to verify performance in target formulations. Lead times vary from 2–6 weeks, with regional warehouses stocking common grades. Certifications like ISO 9001 and REACH compliance are standard. Negotiate pricing based on annual volume commitments.
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