| abstract |
A wood preservative composition comprising a lignosulfonate copolymer and a metal salt or a combination of metal salts. The copolymer is a reaction product of lignosulfonate and acrylic monomers selected from a group of acrylic compounds of the general formula, RCH=CR1COOH, where R is hydrogen, an alkyl or carboxyl group and R1 is hydrogen or an alkyl group, and the metal salt is a salt of sulfate, chloride, phosphate, or carbonate wherein the metal is selected from the group consisting of copper, zinc, mercury and lead. Alternatively, the composition may be a metal salt or a combination of metal salts of a lignosulfonate copolymer produced by base exchange of the corresponding calcium lignosulfonate copolymer with a metal salt or metal salts. The composition may be used, optionally, together with methylol phenol. |