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    1. Archive

    Bonds Across the Water

    Sept. 13, 2007
    Two polyurethane adhesives have crossed the Atlantic, joining the Araldite 2000 Plus family of epoxy, methacrylate, and polyurethane adhesives from Huntsman Advanced Materials , The Woodlands, Tex. The 2000 Plus range of structural adhesives are known for their lightweight, durable, and long-lasting bonds.
    Jean M. Hoffman

    They range from load-bearing versions for bonding met als and composites, resilient and exible options for thermoplastics and metal combinations, and those that cure slowly for large-area application. Various grades l gaps and bond vertical joints, trans parent grades join glass, and others resist high temperatures and chemicals and bond in minutes. Both grades are low-shrink polyurethane adhesives that are more exible (i.e., high elongation) than their epoxy counterparts.

    Araldite 2018 is a low-viscosity, easy-to-handle polyurethane for bonding tough-to-join thermoplas tics including ABS, SMC, polycar bonate, and glass-reinforced com posites. Bonded assemblies are strong enough to handle in 4 hr at ambient temperature or in 4 min at 212°F (100°C). The adhesive also has good UV stability.

    Araldite 2055 is a gap-filling polyurethane adhesive for use on polyamides, thermoset composites, ABS, metals, and ceramics. It features a 1-hr pot life, making it suitable for assembling large parts. It cures in 20 min at 212°F (100°C) and maintains good bond strength even when exposed to heat, and humidity.

    Huntsman Advance Materials, (281) 719-6000, huntsman.com

    A European boatmaker used Araldite 2018 to glue acrylic navigation-equipment screens into their ABS housings. The ible polyurethane adhesive resists vibrations and water and has better shear and peel strength than the adhesive it replaced.

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