A water-soluble and/or water-swellable hybrid polymer comprising: (i) from 5 wt.-% to 95 wt.-% water-soluble and/or water-swellable polysaccharide polymer; (ii) from 5 wt.-% to 95 wt.-% synthetic polymer comprising: (a) from 40 mol-% to 98 mol-% repeating units according to Formula wherein: R 1 and R 2 are independently selected from H, methyl or ethyl; A is a linear or branched C 1 -C 12 -alkyl group; and Q + is H +, NH 4 +, organic ammonium ions [NHR 5 R 6 R 7] + wherein R 5, R 6, and R 7 independently of one another may be hydrogen, a linear or branched alkyl group having 1 to 22 carbon atoms, a linear or branched, singularly or multiply unsaturated alkenyl group having 2 to 22 carbon atoms, a C 6 -C 22 alkylamidopropyl group, a linear mono-hydroxyalkyl group having 2 to carbon atoms or a linear or branched dihydroxyalkyl group having 3 to carbon atoms, and where at least one of the radicals R 5, R 6, and R 7 is not hydrogen, or Q + is Li +, Na +, K +, 1⁄2 Ca ++, 1⁄2 Mg ++, 1⁄2 Zn ++, 1/3 Al +++, or mixtures thereof; (b) from 0.01 mol-% to 5 mol-% crosslinking or branching units, wherein the crosslinking or branching units result from the incorporation of a monomer comprising at least two olefinically unsaturated double bonds; (c) from 0.01 mol-% to 44.99 mol-% of neutral structural units; (d) from 1.98 mol-% to 20 mol-% of anionic structural units, wherein the repeating anionic structural units result from the incorporation of a monomer comprising at least one carboxylate anion, and wherein the repeating anionic structural units are different from units (a); characterised in that the components (i) and (ii) are polymerised by radical precipitation polymerisation in a polar solvent. (i) from 5 wt.-% to 95 wt.-% water-soluble and/or water-swellable polysaccharide polymer; (ii) from 5 wt.-% to 95 wt.-% synthetic polymer comprising: (a) from 40 mol-% to 98 mol-% repeating units according to Formula wherein: R 1 and R 2 are independently selected from H, methyl or ethyl; A is a linear or branched C 1 -C 12 -alkyl group; and Q + is H +, NH 4 +, organic ammonium ions [NHR 5 R 6 R 7] + wherein R 5, R 6, and R 7 independently of one another may be hydrogen, a linear or branched alkyl group having 1 to 22 carbon atoms, a linear or branched, singularly or multiply unsaturated alkenyl group having 2 to 22 carbon atoms, a C 6 -C 22 alkylamidopropyl group, a linear mono-hydroxyalkyl group having 2 to carbon atoms or a linear or branched dihydroxyalkyl group having 3 to carbon atoms, and where at least one of the radicals R 5, R 6, and R 7 is not hydrogen, or Q + is Li +, Na +, K +, 1⁄2 Ca ++, 1⁄2 Mg ++, 1⁄2 Zn ++, 1/3 Al +++, or mixtures thereof; (b) from 0.01 mol-% to 5 mol-% crosslinking or branching units, wherein the crosslinking or branching units result from the incorporation of a monomer comprising at least two olefinically unsaturated double bonds; (c) from 0.01 mol-% to 44.99 mol-% of neutral structural units; (d) from 1.98 mol-% to 20 mol-% of anionic structural units, wherein the repeating anionic structural units result from the incorporation of a monomer comprising at least one carboxylate anion, and wherein the repeating anionic structural units are different from units (a); (a) from 40 mol-% to 98 mol-% repeating units according to Formula wherein: R 1 and R 2 are independently selected from H, methyl or ethyl; A is a linear or branched C 1 -C 12 -alkyl group; and Q + is H +, NH 4 +, organic ammonium ions [NHR 5 R 6 R 7] + wherein R 5, R 6, and R 7 independently of one another may be hydrogen, a linear or branched alkyl group having 1 to 22 carbon atoms, a linear or branched, singularly or multiply unsaturated alkenyl group having 2 to 22 carbon atoms, a C 6 -C 22 alkylamidopropyl group, a linear mono-hydroxyalkyl group having 2 to carbon atoms or a linear or branched dihydroxyalkyl group having 3 to carbon atoms, and where at least one of the radicals R 5, R 6, and R 7 is not hydrogen, or Q + is Li +, Na +, K +, 1⁄2 Ca ++, 1⁄2 Mg ++, 1⁄2 Zn ++, 1/3 Al +++, or mixtures thereof; (b) from 0.01 mol-% to 5 mol-% crosslinking or branching units, wherein the crosslinking or branching units result from the incorporation of a monomer comprising at least two olefinically unsaturated double bonds; (c) from 0.01 mol-% to 44.99 mol-% of neutral structural units; (d) from 1.98 mol-% to 20 mol-% of anionic structural units, wherein the repeating anionic structural units result from the incorporation of a monomer comprising at least one carboxylate anion, and wherein the repeating anionic structural units are different from units (a);