Abstract: [Objective] In order to improve the durability of exterior wood treated by triazole formulations, the leachability of 5 kinds of emulsified triazoles and their copper triazole formulations was analyzed and compared.[Method] According to the procedures of GB/T 29905-2013, the leaching properties of 5 kinds of triazole micro-emulsion and their copper amine formulations were determined and compared,and the leaching properties of triazole formulations with 4 kinds of waterproofing agents were also conducted in this paper.[Result] The fixation rates of propiconazole (PPZ) and hexaconazole (Hex) were above 70%, and higher than those of other triazoles. The fixation rate of tebuconazole(TEB)was slightly lower than that of PPZ and Hex. The fixation rate of cyproconazole(CY)in treated wood ranged from 60% to 70%, while that of triadimenol (Tri) was less than 60% at the highest retention. There was no significant difference in fixation rate between any two of the same kind of triazoles with different emulsified formulations. After mixed with copper amine, the fixation rates of triazoles were improved and higher than 80%, whereas the fixation rate of copper of Cu amine/triazoles formulations was more than 90%.[Conclusion] The fixation rates of propiconazole (PPZ) and hexaconazole (Hex) were above 70%. The different emulsifiers had less effect on the leachability of triazoles. The fixation rates of triazoles in treated wood could be improved when mixed with copper amine or brushed with waterproofing agents on wood surface.

Key words: hexaconazole, cyproconazole, triadimenol, copper triazoles, leachability