Wood preservatives

C - Chemistry – Metallurgy – 07 – C

Patent

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Details

C07C 229/08 (2006.01) A01N 33/12 (2006.01) A01N 37/40 (2006.01) A01N 37/44 (2006.01) B27K 3/34 (2006.01) B27K 3/36 (2006.01) B27K 3/38 (2006.01) C07C 211/62 (2006.01) C07C 211/63 (2006.01)

Patent

CA 2250986

Wood preservatives having biocidal properties which comprise quaternary ammonium compounds of general formula (I) are described. In this formula, R1 is a C8-18-alkyl group or an optionally substituted benzyl group, R2 is a C8-18-alkyl group, R3 is a C1-4-alkyl group or a group of the formula -[CH2-CH2-O]n-H, R4 is a C1-4-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. The wood preservatives according to the invention also penetrate deeply into the wood without the use of pressure, and have only a mild corrosive action on metals. Furthermore, this invention refers to a process for treating timbers with these compositions, concentrates for the preparation thereof, the use of new and known quaternary ammonium compounds in wood preservatives and new quaternary ammonium compounds and their use as biocides.

L'invention concerne des conservateurs du bois, présentant des propriétés biocides et comprenant des composés d'ammonium quaternaire selon la formule générale (I). Dans cette formule, R<1> est un groupe alkyleC8-18 ou un groupe benzyle éventuellement substitué, R<2> est un groupe alkyleC8-18, R<3> est un groupe alkyleC-1-4 ou un groupe de la formule -(CH2-CH2-O)n-H, R<4> est un groupe alkyleC1-4, n est un nombre compris entre 0,5 et 8, de préférence, entre 1 et 5, et A<-> est l'anion d'un acide carboxylique organique qui contient 2 à 12 atomes de C et porte au moins un groupe hydroxyle, amino ou acide sulfonique. Les conservateurs du bois selon l'invention pénètrent en profondeur dans le bois sans nécessiter de pression, et n'exercent qu'une légère action corrosive sur les métaux. En outre, l'invention concerne un procédé pour traiter les bois de construction à l'aide de ces compositions et des concentrés pour la préparation de ces dernières. Par ailleurs, l'invention concerne aussi l'utilisation de composés d'ammonium quaternaire nouveaux et connus dans les conservateurs du bois, et de nouveaux composés d'ammonium quaternaire ainsi que leur utilisation comme biocides.

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