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Due to the increasing need for specialised adhesives, Huntsman Advanced Materials is launching a new range of composite bonders for assembling dissimilar materials, which with the addition of silane modified polymers adds a fourth category to the Araldite range.
The new additions are the high strength composite bonder Araldite AW 4858 / Hardener HW 4858, the highly temperature resistant Araldite AW 4859 / Hardener HW 4859, both epoxy based, and a pair of silane modified polymers, one component, moisture curing adhesives, Araldite 2060 and Araldite 2061.
Both above mentioned epoxy based adhesives are available in cartridges, and display lap shear strengths of up to 40 MPa on composite parts. In addition, the methacrylate based adhesive Araldite 2048 has been developed especially to meet the need of bonding untreated composite parts. Huntsman say that this product is more balanced in terms of strength and flexibility than high-strength epoxies, and is performing well even on otherwise difficult to bond surfaces.
With the introduction of a pair of silane modified polymers, the current Araldite range of epoxy, polyurethane and methylmethacrylate adhesives is extended. According to Huntsman, both silane modified products are highly flexible, over-paintable and show superior durability and weather resistance. Araldite 2061 is black in colour in order to match a composite look.
Bodo Wixmerten, Technology Manager, said: “Adhesives have numerous advantages over mechanical joining techniques. This becomes even more obvious when it comes to the assembly of dissimilar substrates as well as lightweight composite parts. Bonding allows a uniform distribution of strain and stresses across the joint, which makes it the ideal technique to join composites of different constitution. The new additions to the Araldite range will help any company which is looking for better ways of joining dissimilar materials to achieve more efficiency and cost savings.”
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