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The effect of neonicochid type wood preservatives on adhesive properties of resorcinol-formaldehyde resin for laminated wood manufacture was examined. By the previous studies, it was verified that the neonicochid type preservative has a high termite-proofing and anti-mold effectiveness. Commercial ACQ (ammoniacal copper quaternary compounds) and CUAZ (copper azol compounds) were used as comparison preservatives of effects on adhesive properties. The wood specimens used japanese red pine (Pinus densifrora) after application with preservatives and then bonded with resorcinol-formaldehyde resin. Adhesive properties were evaluated by shearing strength of adhesive bond and wood failure to dry condition or after accelerated aging test. Of all laminated woods, the wood specimens spread with ACQ or CUAZ showed the lowest shearing strength of adhesive bond. We estimated that the decrease of shearing strength was caused by copper in the ACQ or CUAZ preservatives. On the application of the neonicochid type preservatives, the wood specimens showed the highest shearing strength even after accelerated aging test. From these results, it is concluded that the copper-free neonicochid type preservative not affected the curing of resorcinol-formaldehyde resin.

Effect of Neonicochid Type Wood Preservative on Adhesive Properties of Resorcinol Resin for Lminated Wood