Acidic wood extractives accelerate the curing process of emulsion polymer isocyanate adhesives

Drying of Emulsion Adhesives

Maximizing lines speeds on coating/drying equipment is an obvious approach to improving manufacturing economics. Insufficient dryer capacity is often an impediment to taking advantage of the mechanical speed limit for an existing line, but adding additional dryer capacity can be prohibitive due to return on investment and/or space limitations. Optimizing oven settings becomes a critical path to...

Chemical extractives of the tropical wood

1 Wallaba (Eperua falcata) is a tropical wood which is known to have naturally low swelling 2 characteristics. Samples of wallaba heartwood were subjected to differential solvent 3 extraction. Wood pieces that were extracted with methanol experienced significantly higher 4 swelling after rehydration from oven dry to 96% relative humidity in comparison to non-5 extracted samples and samples extr...

Phenolic Extractives and Natural Resistance of Wood

Wood Adhesion and Adhesives

9.1 General..................................................................................................................................216 9.2 Wood Adhesive Uses............................................................................................................217 9.3 Terminology..........................................................................................................

Adhesives for Achieving Durable Bonds with Acetylated Wood

Acetylation of wood imparts moisture durability, decay resistance, and dimensional stability to wood; however, making durable adhesive bonds with acetylated wood can be more difficult than with unmodified wood. The usual explanation is that the acetylated surface has fewer hydroxyl groups, resulting in a harder-to-wet surface and in fewer hydrogen bonds between wood and adhesive. This concept w...