| 摘要 |
This invention relates to a timber preservative solution, to a method of treating timber using the preservative solution and to timber so treated. Boron based timber preservatives are common in the art, since boron is an effective fungicide, termiticide and insecticide that is also environmentally friendly, of low toxicity and fairly simple to apply since it diffuses readily into the timber in the presence of moisture without the need for pressure impregnation or sophisticated machinery. However, the ability of boron to diffuse in this manner results in a commensurate propensity to leach from the timber fairly quickly. This necessitates frequent repeat treatment of the timber to ensure that it remains protected. The timber preserving solution comprises a timber preserving water soluble inorganic salt solute, such as boric acid, borax, boric oxides or, preferably, Disodium Octaborate Tetrahydrate (D.O.T.), dissolved in an aqueous polymer solvent, such as commercially available aqueous polymer products. The boron compound is preferably mixed with the aqueous polymer solvent in a range of concentrations of from about 20 g/l BAE (boric acid equivalent) to about 300 g/l BAE. The timber preserving solution of the invention can be sued in remedial or in-situ treatment of cured timber and to first time or primary treatment of timber, that is treatment of the green timber prior to drying or curing. |
