Modification of phenolic resin with organosolv lignins and evaluation of strandboards made by the resin as binder

Two major types of structural wood composites are plywood and flakeboards. In the United States, over 20 percent of the structural wood composites are oriented strandboards and waferboards. In Canada, the amount is greater than 50 percent. In North America, over 90 kt of exterior-type adhesive solids (phenol-formaldehyde and isocyanate resins) are used to bond these strandboards and waferboards. This document reports on the efficacy of substituting organosolv lignin for 20 to 35 percent of the phenol in phenol-formaldehyde (PF) resins used to bond strandboards. The lignin in one experiment was a co-product of the ALCELL...