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US 5,462,589 AGranted
Synergistic wood preservative compositions
AssigneeMississippi Forest Products Laboratory
InventorsDarrel D. Nicholas, Tor P. Schultz
Life of this patent
Estimating the term…
Abstract
The invention is directed to synergistic biocidal compositions that combine a copper salt and an organic biocide selected from the group of tribromophenol, its salts and chelates, and sodium-omadine, its salts and chelates. Wood treated with the preservative compositions have improved fungi resistance.
Claims7
A biocidal composition for preserving wood having improved efficacy comprising a combination of:
- (a) a copper salt;
- and
- (b) an organic biocide selected from the group consisting of tribromophenol, the salts and chelates of tribromophenol, and sodium pyrithione, and the chelates thereof, wherein the combination forms a complex that is substantially non-leachable from wood and wherein the weight ratio of copper to tribromophenol is in the range of about 20:1 to 1:20, and the weight ratio of copper to sodium pyrithione is about 20:1 to 1:2.
Dependencies are inferred from the claim text.