Abstract: The invention relates to a composition comprising a fluorine-containing surfactant having a cationic group, a divalent sulfur-containing group and a fluorinated group, further comprising an anion that corresponds to the cationic group of the fluorine-containing surfactant, the cationic group being an N-alkylated heterocyclic group.

Abstract: The invention relates to a filter for separating hydrophilic from hydrophobic fluids, wherein the filter comprises an oleophobic polymer, consists thereof or is coated therewith, and wherein the filter exhibits hydrophilic and oleophobic properties, wherein at least some of the repetitive units of the oleophobic polymer can be traced back to a fluorine-containing monomer which is an ionic organic molecule that has an ionic group, a cross-linkable group and a fluorine-containing group. The invention further relates to a method for producing such a filter and to a method for separating hydrophilic and hydrophobic fluids by using such a filter.

Abstract: The invention relates to a composition comprising a fluorine-containing surfactant having a cationic group, a divalent sulfur-containing group and a fluorinated group, further comprising an anion that corresponds to the cationic group of the fluorine-containing surfactant, the cationic group being an N-alkylated heterocyclic group.

Abstract: The invention relates to a crosslinkable composition comprising functionalized monomers comprising a crosslinkable group, a cationic group and a fluorinated group, wherein the composition comprises anions corresponding to the cationic groups of the functionalized monomers, wherein the cationic group is an N-substituted cyclic and in particular heteroaromatic group comprising a 5-membered ring and/or at least two heteroatoms and wherein a spacer which is an uncharged and unfluorinated organyl group and preferably an alkylene group is arranged between the cationic group and the fluorinated group.