Long-chain quaternary ammonium compounds as wood treatment agents
View Patent ↗A composition is disclosed comprising a long-chain quaternary ammonium compound and a wood preservative active agent or a mixture thereof. The long-chain quaternary ammonium compound includes at least one alkyl moiety having from 16 to 50 carbon atoms, unsubstituted or substituted with one or more N, O, S, or halogen atoms. A method of treating wood is disclosed, comprising impregnating wood with the above composition in an amount effective to reduce the preservative active ingredient loss in the treated wood or to increase the resistance of the wood to decay. Treated wood and wood products are disclosed comprising wood impregnated with the above composition, including a treatment level of the long-chain quaternary ammonium compound effective to reduce the preservative active ingredient loss in the treated wood or to increase the resistance of the wood to decay.
1. A composition comprising:
A. a long-chain quaternary ammonium compound having the formula:
wherein:
R 1 and R 2 are the same or different alkyl moieties having 1 to 4 carbon atoms;
R 3 is a long chain alkyl moiety having from 16 to 50 carbon atoms;
R 4 is a long chain alkyl moiety having from 16 to 50 carbon atoms;
X is an anion; and
n is a number from 1 to 3; and
B. a metal constituent based wood preservative.
2. The composition of claim 1 , wherein the anion comprises a halide, an inorganic oxo anion, an organic anion, or a combination thereof.
3. The composition of claim 1 , wherein the anion comprises chloride, carbonate, bicarbonate, hydroxide or a combination thereof.
4. The composition of claim 1 , wherein R 1 and R 2 are methyl.
5. The composition of claim 1 , wherein R 3 is an alkyl moiety having from 16 to 22 carbon atoms.
6. The composition of claim 1 , wherein R 3 is a tallow alkyl moiety.
7. The composition of claim 6 , wherein R 4 is a tallow alkyl moiety.
8. The composition of claim 6 , wherein R 3 is a hydrogenated tallow alkyl moiety.
9. The composition of claim 1 , wherein the long-chain quaternary ammonium compound comprises dimethyldi(hydrogenated tallow)ammonium chloride.
10. The composition of claim 1 , wherein the wood preservative active agent is a metal constituent comprising copper.
11. The composition of claim 1 , wherein the wood preservative active agent is a metal constituent comprising copper, zinc, chromium, silver, cobalt, aluminum, iron, lead, tin, cadmium, nickel or a combination of two or more of these.
12. The composition of claim 1 , wherein the wood preservative active agent comprises a cupric-monoethanolamine complex solution.
13. The composition of claim 1 , wherein the composition comprises an amine copper-long-chain quaternary ammonium wood preservative.
14. The composition of claim 1 , comprising an alkaline copper-long-chain quaternary ammonium wood preservative.
15. The composition of claim 1 , wherein the long-chain quaternary ammonium compound is present at a concentration of from 0.1 to 10% by weight.
16. The composition of claim 1 , wherein the long-chain quaternary ammonium compound is present at a concentration of from 0.3 to 5% by weight.
17. The composition of claim 1 , wherein the long-chain quaternary ammonium compound is present at 0.8% by weight.
18. The composition of claim 1 , wherein the wood preservative active agent is present at a concentration effective to preserve wood contacted with the composition.
19. The composition of claim 1 , wherein the wood preservative active agent is present at a concentration of from 0.02 to 10% by weight.
20. The composition of claim 1 , wherein the wood preservative active agent is present at a concentration of from 0.02 to 5% by weight.
21. The composition of claim 1 , wherein the wood preservative active agent is present at a concentration of from 0.02 to 2% by weight.
22. The composition of claim 1 , wherein the wood preservative active agent further comprises a biocidal quaternary ammonium compound having the formula:
where:
R 1 and R 2 are the same or different alkyl moieties having an average of from 1 to 3 carbon atoms;
R 3 is a short or medium chain saturated or mono-, di-, or poly-unsaturated alkyl moiety having a weight average of from 8 to 14 carbon atoms;
R 4 is an alkyl group having an average of 8 to 12 carbon atoms, an aryl group, an aryl substituted lower alkyl group, where the lower alkyl group has 1-3 carbon atoms, or a combination of these, provided that if R 3 has an average of more than 12 carbon atoms, R 4 is an aryl group, an aryl substituted alkyl group, or a combination of these,
X is an anion; and
n is a number having an average value between 1 and 3.
23. The composition of claim 22 , wherein the biocidal quaternary ammonium compound comprises alkylbenzyldimethyl ammonium chloride, didecyldimethyl ammonium chloride, didecyldimethyl ammonium carbonate, didecyldimethyl ammonium bicarbonate, or a combination of two or more of these.
24. The composition of claim 23 , wherein the biocidal quaternary ammonium compound comprises didecyldimethyl ammonium carbonate, didecyldimethyl ammonium bicarbonate, or a combination of these.
25. A method of treating wood, comprising impregnating wood with the composition of claim 1 in an amount effective to increase the resistance of the wood to decay.
26. Treated wood comprising wood impregnated with the composition of claim 1 , including a treatment level of the long-chain quaternary ammonium compound effective to increase the resistance to the loss of the active ingredients in the preservative system.
27. Treated wood comprising wood impregnated with the composition of claim 1 , including a treatment level of the long-chain quaternary ammonium compound effective to increase the resistance of the wood to decay.