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US 8,119,031 B2Granted
Mixed solubility borate preservative
AssigneeU.S. Borax Inc.
InventorsJeffrey D. Lloyd, Mark J. Manning, Frederick M. Ascherl
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AssigneeU.S. Borax Inc.
InventorsJeffrey D. Lloyd, Mark J. Manning, Frederick M. Ascherl
Estimating the term…
Preservative composition for lignocellulosic-based composites providing rapid and long-lasting protection against insect and fungal attack, in both low and high moisture environments, through the use of a combination of higher solubility and lower solubility borates. Pesticidal amounts of a lower solubility borate and a higher solubility borate are combined before or during their incorporation into a lignocellulosic-based composite. Useful low solubility borates include copper borate, zinc borate and barium metaborate. Useful high solubility borates include boric acid, boric oxide, ammonium borate and alkali metal borates such as sodium borate. Some alkaline earth metal borates, including calcium borates, calcium magnesium borates, magnesium borates and calcium sodium borates, are of intermediate solubility and may be used effectively as either a low soluble or high soluble borate depending on the combination used.
A preservative composition for lignocellulosic-based composites comprising a higher solubility borate and a lower solubility borate, wherein said higher solubility borate is selected from the group consisting of boric acid, boric oxide, ammonium borate, borax pentahydrate, borax decahydrate, sodium pentaborate, disodium octaborate, sodium metaborate, calcium borate, calcium magnesium borate, magnesium borate and calcium sodium borate, and the lower solubility borate is selected from the group consisting of copper borate, zinc borate and barium metaborate, and wherein the higher solubility and lower solubility borates combined have a mean particle size of between about 500 microns and about 1 micron.
A lignocellulosic-based composite having resistance against insect and fungal attack which contains lignocellulosic-based furnish, resin binder and a pesticidal amount of a preservative composition comprising a higher solubility borate and a lower solubility borate, wherein the higher solubility borate is selected from the group consisting of boric acid, boric oxide, ammonium borate, borax pentahydrate, borax decahydrate, sodium pentaborate, disodium octaborate, sodium metaborate, calcium borate, calcium magnesium borate, magnesium borate and calcium sodium borate, and the lower solubility borate is a low solubility borate selected from the group consisting of copper borate, zinc borate and barium metaborate, and wherein the higher solubility and lower solubility borates combined have a mean particle size of between about 500 microns and about 1 micron.
A method for protecting a lignocellulosic-based composite against insect and fungal attack comprising incorporating into the composite a pesticidal amount of a preservative composition comprising a higher solubility borate and a lower solubility borate, wherein said higher solubility borate is selected from the group consisting of boric acid, boric oxide, ammonium borate, borax pentahydrate, borax decahydrate, sodium pentaborate, disodium octaborate, sodium metaborate, calcium borate, calcium magnesium borate, magnesium borate and calcium sodium borate, and the lower solubility borate is a low solubility borate selected from the group consisting of copper borate, zinc borate and barium metaborate, and wherein the higher solubility and lower solubility borates combined have a mean particle size of between about 500 microns and about 1 micron.
Dependencies are inferred from the claim text.