Linear polyamino and/or polyammonium polysiloxane copolymers having the following repeating units: − V 2 * − Z 2 − V 2 * − Q − und − V 1 − Q −, wherein Q is selected from the group consisting of: wherein Q is selected from the group consisting of: -NR-, -N + R 2 - a saturated or unsaturated diaminofunctional heterocycle of the formulas: and as well as an aromatic diaminofunctional heterocycle of the formula: a trivalent residue of the formula: a trivalent residue of the formula: wherein R in each case represents a hydrogen or a monovalent organic residue, wherein Q does not bind to a carbonyl carbon atom, wherein V 2 * represents a divalent straight-chained, cyclic or branched, saturated, unsaturated or aromatic hydrocarbon residue with up to 40 carbon atoms, which can optionally contain one or more groups selected from -O-, -CONH-, -CONR 2 -, -C - and -C -, and the residue V 2 * may optionally be substituted with one or more hydroxyl groups, wherein R 2 = hydrogen, a monovalent straight-chained, cyclic or branched, saturated, unsaturated C 1 to C 16 hydrocarbon residue, which may contain one or more groups selected from -O-, -NH-, -C -, -C -, and which may be optionally substituted by one or more hydroxyl groups, wherein, when several groups -NR 2 are present, these may be the same or different, -Z 2 - has the formula wherein R 1 may be the same or different and is selected from the group selected from: C 1 to C 22 alkyl, fluoro(C 1 -C 10)alkyl and C 6 -C 10 aryl, and n 1 = 20 to 1000, V 1 is selected from divalent or trivalent, straight-chained, cyclic or branched, saturated, unsaturated or aromatic hydrocarbon residues with up to 1000 carbon atoms, which optionally may contain one or more groups selected from -O-, -CONH-, -CONR 2 -, wherein R 2 is as defined above, wherein the groups R 2 of the groups V 1 and V 2* may be the same or different, -C -, -C - and -Z 1 -, wherein -Z 1 - is a group of the formula wherein R 1 is as defined above, wherein the groups R 1 in the groups V 1 and Z 2 may be the same or different, and n 2 = 0 to 19, and the residue V 1 may be optionally be substituted by one or more hydroxyl groups, with the proviso, that the trivalent residues Q and the trivalent residues V 1 exclusively serve the saturation among themselves within the linear main chain of the polysiloxane copolymers, and that in the copolymer the molar ratio of − V 2 * − Z 2 − V 2 * − Q − and − V 1 − Q − is < 1: 3, and wherein the positive charges resulting from the ammonium groups are neutralised by organic or inorganic acid anions, and their acid addition salts. -NR-, -N + R 2 - a saturated or unsaturated diaminofunctional heterocycle of the formulas: and as well as an aromatic diaminofunctional heterocycle of the formula: a trivalent residue of the formula: a trivalent residue of the formula: wherein R in each case represents a hydrogen or a monovalent organic residue, wherein Q does not bind to a carbonyl carbon atom, wherein V 2 * represents a divalent straight-chained, cyclic or branched, saturated, unsaturated or aromatic hydrocarbon residue with up to 40 carbon atoms, which can optionally contain one or more groups selected from -O-, -CONH-, -CONR 2 -, -C - and -C -, and the residue V 2 * may optionally be substituted with one or more hydroxyl groups, wherein R 2 = hydrogen, a monovalent straight-chained, cyclic or branched, saturated, unsaturated C 1 to C 16 hydrocarbon residue, which may contain one or more groups selected from -O-, -NH-, -C -, -C -, and which may be optionally substituted by one or more hydroxyl groups, wherein, when several groups -NR 2 are present, these may be the same or different, -Z 2 - has the formula wherein R 1 may be the same or different and is selected from the group selected from: C 1 to C 22 alkyl, fluoro(C 1 -C 10)alkyl and C 6 -C 10 aryl, and n 1 = 20 to 1000, V 1 is selected from divalent or trivalent, straight-chained, cyclic or branched, saturated, unsaturated or aromatic hydrocarbon residues with up to 1000 carbon atoms, which optionally may contain one or more groups selected from -O-, -CONH-, -CONR 2 -, wherein R 2 is as defined above, wherein the groups R 2 of the groups V 1 and V 2* may be the same or different, -C -, -C - and -Z 1 -, wherein -Z 1 - is a group of the formula wherein R 1 is as defined above, wherein the groups R 1 in the groups V 1 and Z 2 may be the same or different, and n 2 = 0 to 19, and the residue V 1 may be optionally be substituted by one or more hydroxyl groups, -O-, -CONH-, -CONR 2 -, wherein R 2 is as defined above, wherein the groups R 2 of the groups V 1 and V 2* may be the same or different, -C -, -C - and -Z 1 -, wherein -Z 1 - is a group of the formula wherein R 1 is as defined above, wherein the groups R 1 in the groups V 1 and Z 2 may be the same or different, and n 2 = 0 to 19, and the residue V 1 may be optionally be substituted by one or more hydroxyl groups, with the proviso, that the trivalent residues Q and the trivalent residues V 1 exclusively serve the saturation among themselves within the linear main chain of the polysiloxane copolymers, and that in the copolymer the molar ratio of − V 2 * − Z 2 − V 2 * − Q − and − V 1 − Q − is < 1: 3, and wherein the positive charges resulting from the ammonium groups are neutralised by organic or inorganic acid anions, and their acid addition salts.