Performance of copper naphthenate and its analogs as ground contact wood preservatives

Published Date
July 2005, Vol.96(10):1131–1135, doi:10.1016/j.biortech.2004.10.003

• Author 

• H.M. Barnes ^,
• T.L. Amburgey
• M.G. Sanders

• Forest Products Laboratory, Mississippi State University, Box 9820, Mississippi State, MS 39762-9820, USA

Revised 5 October 2004. Accepted 5 October 2004. Available online 8 December 2004. 

Abstract

For several years, an extensive research program investigating new preservative systems has been ongoing at Mississippi State University. This paper details our continuing experience with field testing of copper naphthenate and other copper carboxylate preservative systems. Results from field stake tests at an AWPA Zone 4 test site are presented. In general, copper carboxylates made with ‘synthetic’ acids yielded results equivalent to or only slightly lower than systems with straight naphthenic acids or nap acids amended with synthetic neodecanoic acid bottoms. Oil carrier formulations outperformed those in water or light organic solvents. All systems carried in oil would qualify as ground contact preservatives at the proper retention.

Keywords

Copper carboxylates

Preservatives

Copper neodecanoate

Copper propionate

Stake tests

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