Functionalized Polyorganosiloxanes Or Silanes For The Treatment Of Lignocellulosic Materials

Polyorganosiloxanes or silanes for the treatment of lignocellulosic materials, characterized in that the polyorganosiloxanes are straight-chained, branched or cyclic polyorganosiloxanes, formed from a number average of 2 to 30 siloxy units, which are selected from the group consisting of

• wherein the radicals R−1 represent organic radicals, which may be the same or different, with the proviso that at least one of the radicals R1 is a radical RF containing a functional group F, which is selected from the group of functional groups consisting of:
• phosphonium group,
• phosphine group,
• epoxy group
• carbonate group,
• urethane group,
• isocyanate group including blocked isocyanate group,
• urea group,
• amido group,
• aldehyde group,
• hemiacetal and acetal group,
• enamine group,
• imine group,
• zwitterionic group,
• carboxylic acid, carboxylate group,
• sulfonic acid, sulfonate group,
• sulfuric acid half-ester, sulfate group,
• phosphoric ester, phosphate group
• phosphonic ester, phosphonate group,
• phosphorous ester, phosphite group,
• xanthate, xanthogenate ester group,
• organo amino group Si-bonded via N,
• hydroxy group,
• acyloxy group Si-bonded via O,
• alkoxy group Si-bonded via O, and
• thiosulfato group
• and characterized in that the silanes are represented by the formula (I)
• Si—(R1)4 (I)
• with the proviso that at least one of the radicals R1 is a radical RF containing a functional group F, and at least one of the radicals R1 is bonded to the silicon atom via a hetero atom and at least one of the radicals R1 is bonded to the silicon atom via a carbon atom, or by the formula (II)
• (R1)3—Si—R3—Si—(R1)3 (II)
• wherein the groups R1 may be the same or different and have the meaning as defined for formula (I), and R3 is a divalent, straight-chained, branched, cyclic, aliphatic, unsaturated, or aromatic hydrocarbon radical having up to 30 carbon atoms, which may contain one or more groups selected from —O—;
• —NR4—, wherein R4 is hydrogen or C1-C22-alkyl;
• —C(O)—;
• and —C(S)—;
• and which may optionally be substituted by hydroxy and is bonded to the silicon atom via carbon,
• and salts of any of the foregoing.