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US 9,644,103 B2Granted
Single step creosote/borate wood treatment
AssigneeStella-Jones Inc.
InventorGordon Murray
Life of this patent
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Abstract
Disclosed herein are preservative compositions and methods of using the same for reducing insect and microbial decay in wood. Also disclosed are wooden articles that have been treated with the compositions described herein.
Claims21
A method of treating wood, comprising the steps of:
- a) immersing the wood in a treatment solution;
- and
- b) exposing the immersed wood from step (a) to conditions which cause boron to migrate into the interior of the wood;
- wherein the treatment solution comprises (1) at least about 3% w/w of a reaction product of alkanolamine and borate;
- wherein the reaction product comprises an alkanolamine ester of the borate;
- and (2) at least about 90% w/w creosote;
- wherein the borate comprises disodium octaborate tetrahydrate (DOT);
- and the treatment solution is greater than 98% free of water and is a homogeneously mixed blend.
5 more elements
A method of treating wood, comprising the steps of:
- pressure impregnation of wood immersed in a preservative solution at 160-240° F. and a pressure of 100-160 pounds per square inch (psi);
- wherein the preservative solution comprises (1) at least about 90% w/w creosote;
- and (2) at least about 3% w/w of a reaction product of alkanolamine and borate, which comprises an alkanolamine ester of the borate;
- the borate includes boric acid and at least about 40% w/w of the borate is disodium octaborate tetrahydrate (DOT);
- wherein the preservative solution is greater than 98% free of water and is a homogeneously mixed blend.
2 more elements
Dependencies are inferred from the claim text.