Methylolated nitroparaffins, and in particular the simpler and least expensive exponent of their class, namely tris (hydroxymethyl) nitromethane (TN), function well as hardeners of a variety of tannin-based adhesives while affording considerable side advantages to the adhesive and to the bonded wood joint. In panel products, such as particleboard, medium density fiberboard and plywood, the joint performance which is obtained is of the exterior/ marine grade type, while a very advantageous and very considerable lengthening in glue-mix pot-life is obtained. .
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