Determination of the amine to copper ratio remaining in wood after leaching

IRG/WP 02-30285

N Lucas, J N R Ruddick

The effectiveness of the protection and the environmental impact of the treated wood are two of the most important aspects that need to be understood for all preservatives. Both are particularly influenced by the loss of biocidal components from treated wood. For amine copper preservatives, copper fixation determines the leaching resistance of the copper and amine compounds formed in wood. Previous research has suggested that the degree of copper fixation may be influenced by the amine-copper formulation (including the type of amine), the copper concentration and the ratio of the amine to copper in the treating solution. However, the relationship between amine and copper concentration and the fixation efficiency is not fully understood. The purpose of this study is to determine the influence of a) the type of amine, b) the concentration of copper, and c) the amine to copper mole ratio, on the fixation chemistry of amine-copper preservatives.

Keywords: Amine-copper, mole ratio, leachability, copper concentration, Scots pine, retention

Conference: 02-05-12/17 Cardiff, Wales, UK

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