Delivery system for wood treatment chemicals
View Patent ↗A wood treatment concentrate includes, by weight; (a) 0.1-10% of an active wood treatment chemical, (b) 50-99% of a microemulsion concentrate including: (i) 0.03-80%, preferably 40-70%, of a castor oil ethoxylate or tristyryl phenol ethoxylate, (ii) 0-10%, preferably 0.005-6%, of an ethoxylated phosphoric acid ester as pH buffer, (iii) 0.002-40%, preferably 0.05-29%, of a N—C 8 -C 18 alkyl pyrrolidone and (iv) 0-60%, preferably 0.15-40%, of a N—C 1 -C 4 alkyl pyrrolidone, and (v) 0-30%, preferably 0.5-15%, of an ethylene oxide/propylene oxide block copolymer; and (c) 1-50% of a substituted phenol. The use formulation includes (d) water of dilution.
1. A wood treatment concentrate includes, by weight;
(a) 0.1-10% of an active wood treatment chemical,
(b) 50-99% of a microemulsion concentrate including:
(i) 0.03-80% of a castor oil ethoxylate or tristyryl phenol ethoxylate,
(ii) 0-10% of an ethoxylated phosphoric acid as pH buffer,
(iii) 0.002-40% of a N—C 8 -C 18 alkyl pyrrolidone and
(iv) 0-60% of a N—C 1 -C 4 alkyl pyrrolidone, and
(v) 0-30% of an ethylene oxide/propylene oxide block copolymer, and
(c) 1-50% of a substituted phenol.
2. A wood treatment concentrate according to claim 1 wherein (i) is 40-70%, (ii) is 0.005-6%, (iii) is 0.05-29%, (iv) is 0.15-40% and (v) is 0.5-15%.
3. A wood treatment concentrate according to claim 1 wherein (a) forms a molecular complex with (c).
4. A concentrate according to claim 1 wherein (a) is 0.5-5%; (b) is 60-95%, and (c) is 5-40%.
5. A concentrate according to claim 1 wherein (c) is selected from the group consisting of thymol, cresol, hexachlorophene, methylene bis 2,6, dichlorophenol, dichlorophene, 2,4,dichloro 3,5, dimethyl phenol (DCMX), xylenol, chloro xylenols, 4-benzyl 2-chloro 6-methyl phenol, 5-chloro-2-hydroxy biphenyl, chlorophene, p-chloro m-cresol, methoxy phenol, ethoxy phenol, isopropoxy phenol and pentachlorophenol.
6. A concentrate according to claim 1 wherein (a) includes bethoxazin.
7. A formulation of the concentrate of claim 1 and (d) water of dilution at a dilution ratio of 1:10 to 1:1000.
8. A formulation according to claim 7 at a dilution ratio of 1:20 to 1:100.