An investigation into the stability of TBTO in LOSP-treated radiata pine

IRG/WP 3459

K J Archer, R Meder

Nuclear magnetic resonance (NMR) spectroscopy and reverse phase paper chromatography were used to characterise the organotin compounds found in radiata pine treated with bis (tri-n-butyl) tin oxide (TBTO). Preliminary results indicate that the preservative is remarkably unstable in wood after light organic solvent preservative (LOSP) treatment. Significant decomposition of TBTO occurs in a matter of hours. White crystalline material observed on the surface of treated wood was identified as tributyltin acetate (TBTA). Other tributyltin esters, dibutyltin ethers, and butyltin chlorides were also identified.


Keywords: PINUS RADIATA; TBTO; STABILITY; LOSP; RESIN ACIDS; ORGANOTINS; DEGRADATION; TRIBUTYLTIN ACETATE; NMR; PAPER CHROMATOGRAPHY

Conference: 87-05-17/22 Honey Harbour, Ontario, Canada


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