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Attaching Hard-to-bond Construction Materials for Innovative Performance

Andy Extance – Jan 10, 2012

Epoxy adhesives are the longest-used, best known and among the most common structural adhesives in general use. Polyurethanes are much more flexible, tough and elastic, which helps when adhesive bonds are subjected to impact or peeling forces and subjected to dynamic fatigue stresses. However, they are not as useful as epoxies for bonding metals, and are generally more suitable for bonding plastic materials in applications that are subjected to bending and impact stresses. Meanwhile, methacrylates offer a more convenient open and cure time regime than either. All three have struggled to bond composites, however, but recently improved methacrylate formulations have overcome this issue, opening up ever more construction applications.

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