| 摘要 |
1. Wood preservative having biocidal properties, characterized in that it comprises, in aqueous solution, at least one quaternary ammonium compound of the general formula wherein R<1> is a C8-C18-alkyl group or an optionally substituted benzyl group, R<2> is a C8-C18-alkyl group, R<3> is a C1-C4-alkyl group or a group of the formula -[CH2-CH2O]n-H, R<4> is a C1-C4-alkyl group, n is a number from 0.5 to 8, preferably from 1 to 5, and A- is the anion of an organic carboxylic acid which contains 2 to 12 C atoms and carries at least one hydroxyl, amino or sulphonic acid group, and one or more other biocides comprising at least one copper compound and/or zinc compound and/or one or more auxiliaries from the group consisting of defoamers, antioxidants, dyestuffs or fragrances, and if appropriate one or more water-miscible organic solvents. 2. Wood preservative according to claim 1, characterized in that it contains N,N-dimethyl-N-benzyl-N-(coconut alkyl)ammonium, N,N-didecyl-N-methyl-N-(polyoxyethyl) ammonium or N,N-didecyl-N,N-dimethylammonium as the cation. 3. Process for the treatment of timbers against wood-destroying fungi and/or insects, characterized that the timbers to be treated are impregnated with the wood preservative according to one or more of claims 1 to 2. 4. Concentrate for the preparation of a wood preservative according to one or more of claims 1 to 3, characterized in that it comprises 5-90 % by weight of a quaternary ammonium compound of the general formula whererin R<1> to R<4> and A<-> have the meanings given in claim 1, and water, one or more other biocides and/or one or more auxiliaries from the group consisting of defoamers, antioxidants, dyestuffs and fragrances, and if appropriate one or more water-miscible organic solvents. 5. Quaternary ammonium compound of the general formula wherein R<1>, R<2> and R<4> have the meanings given in claim 1, A<-> is aminoacetate (glycinate), 2-amino- or 3-amino-propionate (α- or β-alaninate) or o-, m- or p-hydroxybenzoate and R<3> is a C1-C4-alkyl group. 6. Quaternary ammonium compound according to claim 5, characterized in that R1 is a C8-14 alkyl group, a coconut alkyl group or a benzyl group and R<2> is a C8-C14-alkyl group or a coconut alkyl group and R<3> and R<4> are methyl groups. 7. Quaternary ammonium compound according to claim 6, characterized in that R<1> is a benzyl group and R<2> is a coconut alkyl group. |
