Method and formulation for the treatment of timber
AssigneeArch Wood Protection Pty Ltd
InventorsDavid Humphrey, Brett Skewes, Shane McFarling
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Abstract
According to the present invention there is provided a method of treating timber with a creosote-containing preservative formulation adapted for use at substantially ambient temperature. The formulation comprises: creosote; one or more surfactants such that when diluted with a predetermined quantity of water, the creosote is present as an oil-in-water macroemulsion or microemulsion; and optionally, an anti-foaming agent and/or a fire retardant. It is found empirically that the inventive concentrate allows for the use of creosote, a known-effective biocide, without many of the drawbacks inherent in such use.
Claims21
A method of treating timber, the method comprising the steps of:
- selecting a timber substrate;
- and
- applying to the substrate an effective amount of a diluted preservative formulation concentrate comprising an oil-in-water macroemulsion or microemulsion of creosote in water,
- wherein the preservative formulation concentrate comprises creosote and at least two surfactants, a non-ionic surfactant and an anionic surfactant,
- wherein the non-ionic surfactant is ethoxylated castor oil,
- wherein the anionic surfactant comprises a calcium alkylbenzene sulfonate
- wherein the non-ionic surfactant is present in concentrate in an amount of from 1% to about 20% w/w,
- wherein the creosote is present in the concentrate in an amount of about 70% to about 95% w/w;
- and
- wherein the preservative formulation is at substantially ambient temperature.
A preservative concentrate for the treatment of timber at substantially ambient temperature, the preservative comprising:
- creosote present in the concentrate in an amount of about 70% to about 95% w/w;
- and
- at least two surfactants comprising a non-ionic surfactant and an anionic surfactant, such that when the preservative is diluted with a predetermined quantity of water, the creosote is present as an oil-in-water macroemulsion or microemulsion;
- and
- wherein the non-ionic surfactant is ethoxylated castor oil and the anionic surfactant comprises a calcium alkylbenzene sulfonate or sodium dodecylbenzene sulfonate;
- and
- wherein the non-ionic surfactant is present in an amount of from 1% to about 20% w/w.
Dependencies are inferred from the claim text.