Patent ID: 8481165

Claim:
A method for the treatment of wood or wood products, comprising: impregnating the wood or wood products with a treatment agent under a vacuum pressure of 1.5 to 20 bar, wherein the treatment agent comprises: 5 to 99.5% by mass water; less than 95% by weight of an alcohol; at least one linear, cyclic, branched or crosslinked co-oligomer of the formula (I) comprising at least one siloxane structure selected from the group consisting of an alkyl-siloxane, an aminoalkyl-siloxane, an alkoxy-siloxane, and a hydroxy-siloxane: R[—O 2/2 Si(R 1 ) 2 ] w [—O (3-h)/2 Si(R 1 )(OR) h ] x [—O (3-i-j)/2 Si(R a {.HX} g )(CH 3 ) i (OR) j ] y [—O (4-k)/2 Si(OR) k ] z (I), wherein each R is independently H, methyl, ethyl, isopropyl or n-propyl, each R 1 is independently a linear, branched or cyclic, optionally substituted alkyl group having 1 to 18 carbon atoms, each R a is an aminoalkyl group of the formula (Ia): H 2 N(CH 2 ) d [(NH) e (CH 2 ) f ] β — (Ia), wherein 0≦d≦6, 0≦f≦6, where e equals 0, if d equals 0, then β equals 1, where e equals 1, if d>0, then β equals 1 or 2, X is independently at least one of an organic or inorganic acid radical selected from the group consisting of chloride, formate, acetate and phosphate, g equals 0, 1, 2 or 3, h, i and j, independently are 0 or 1, k is 0, 1, 2 or 3 and x, y, z and w are identical or different and x is a number of from 0 to 50, y is a number of from 1 to 50, z is a number of from 0.001 to 10 and w is a number of from 0 to 30, with (w+x+z)>1; and from 0.001 to 0.2 mol of at least one alkoxysilane selected from the group consisting of tetraethoxysilane, methyltriethoxysilane, n-propyltriethoxysilane, isobutyltriethoxysilane, n-octyltriethoxysilane, isooctyltriethoxysilane, perfluoropropyltriethoxysilane, tridecafluoro-1,1,2,2-tetrahydrooctyltriethoxysilane, corresponding hydrolysis products, and partial hydrolysis products per mole of Si of the siloxane co-oligomers; wherein the treated wood or wood product is water-repellent and simultaneously has at least one property selected from the group consisting of an antifungal, antibacterial, insect-repellent and antialgal property; and a content of free acid in the treatment agent is less than 10% by mass, based on the composition of the agent, wherein the impregnated wood or wood product is dried under controlled conditions in the open air until a wood moisture content of from 12 to 18% is established and is then (i) treated for from 2 hours to 4 weeks at from 50 to 120° C. or (ii) dried for from 2 hours to 4 weeks at from about 50 to 60° C. and optionally after treated for further 2 to 48 hours at about 120° C. or (iii) drying in a conditioning chamber or drying with superheated steam is carried out for from 2 hours to 2 weeks at from about 50 to 130° C.