Compositions for producing difficult-to-wet surface

A process for producing a difficult-to-wet surface, which comprises applying a coating composition to a conventional surface selected from the group consisting of wood, metal, glass, plastic, concrete, plaster, paper, shaped articles, paper, card, or polymer films, electrical equipment, surfaces exposed to weathering, surfaces in the sanitary sector, components which come into contact with liquids, cooling equipment, ship hulls, external surfaces of aircraft, packaging for liquids, storage vessels, fabric, leather, and hair, in an amount of from 0.01 to 1000 g/m2 based on the solid constituents of the coating composition, wherein the coating composition comprises i) at least one finely divided powder whose particles have a hydrophobic surface and a porous structure characterized by a BET surface area, determined in accordance with DIN 66131, of at least 1 m2/g, and ii) at least one film-forming binder, which is a thermoplastic polymer and which is characterized by a surface tension <50 mN/m,

• the weight ratio of powder to binder is in the range from 1:1 to 1:5.

A shaped article, which comprises at least one difficult-to-wet surface region which is composed essentially of a coating composition comprising

• i) at least one finely divided powder whose particles have a hydrophobic surface and a porous structure characterized by a BET surface area, determined in accordance with DIN 66131, of at least 1 m2/g, and ii) at least one film-forming binder characterized by a surface tension <50 mN/m and which is selected from the group consisting of C2-C6 polyolefins, homopolymers of ethylenically unsaturated monomers containing C8-C36 alkyl groups, and copolymers of ethylenically unsaturated monomers containing C4-C36 alkyl groups and ethylenically unsaturated comonomers copolymerizable therewith, the weight ratio of powder to binder being at least 1:1.5.