Composition for oil- and/or water-repellent finishing of fiber materials

An aqueous composition comprising at least the components A, B and C, wherein

• component A is a mixture containing at least the components A4 to A6, wherein
• component A4 is an alkyl hydrogen polysiloxane,
• component A5 is water and
• component A6 is an ethoxylated alcohol or a mixture of ethoxylated alcohols,
• wherein component B is a mixture containing at least the components B1 to B3, wherein component B1 is a polyurethane which contains isocyanate groups and whose isocyanate groups are blocked and wherein the polyurethane is constructed from an aromatic or aliphatic diisocyanate, wherein the diisocyanate was reacted with a dial having 2 to 6 carbon atoms, a trihydric aliphatic alcohol and an N-alkylated diethanolamine or triethanolamine,
• component B2 is a dispersant or dispersant mixture and contains ethoxylated alcohols and optionally a dihydric aliphatic alcohol and optionally an inorganic acid, and
• component B3 is water,
• wherein component C is a polymer containing perfluoroalkyl groups, wherein 55 to 100% of all perfluoroalkyl groups present contain 6 carbon atoms,
• and wherein the composition optionally further contains, as component D, a zirconium salt.