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Urea-formaldehyde Replacement Wood Adhesives Enter New Territory

Andy Extance – Apr 18, 2012

Adhesives based on soy protein have gained a great deal of interest in order to replace urea-formaldehyde resins used to produce wood laminates, in the interest of lowering urea emissions. One formulation strategy is including amine-epichlorohydrin adducts, to make AE/soy adhesives. However, the bending and stiffness strengths of composite boards using AE/soy adhesives needs improving. But now, by adding isocyanates to the formulation, not only has this issue been resolved, but substrates like yellow birch veneers that were previously hard to bond can be adhered.

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