Preliminary Study of the Leaching Resistance of Boron from Borate Treated Wood by the Dual Treatment with Water-Repellent Preservative and Methyl Metacrylate

방부성(防腐性) 발수제(撥水劑)와 methyl metacrylate 이중처리(二重處理)에 의(依)한 붕소화합물(硼素化合物) 처리재(處理材)로부터 붕소(硼素)의 용탈(溶脫) 저항성(抵抗性)에 관(關)한 기초연구(基礎硏究)

Sapwood samples of pitch pine were treated with disodium octaborate alone by dip-diffusion, or in combination with water-repellent preservative(WRP) and methyl metacrylate(MMA). Treated samples were subjected to an accelerated leaching test for determining the improvement of leaching resistance and to soft rot and mold tests for evaluating the increase in bioefficacy, due to the addition of WRP and MMA applied as a second treatment. The addition of WRP and MMA retarded leaching of boron to some extent from treated samples and this retardation can be explained by improved water repellency of WRP and MMA treated samples. Borate /WRP and borate /MMA systems will not qualify borate treated wood for ground and fresh water contact use but may improve performance of borate treated wood in above-ground applications not subjected to continuous wetting conditions. Bioefficacy against soft rot fungi and mold fungi was improved by a second treatment with WRP. However, improvement in the performance of borate /MMA systems was not observed. Considering improvement in both resistance of leaching and bioefficacy against micro fungi by the treatment of WRP and MMA, simultaneously, the dual treatment of borate treated wood by MMA containing co-biocides might be believed as an ideal treatment system.