Patent ID: 6683126
Filing Date: 2004-01-27
Classification: C08K,C08L,C09D,Y10S

Abstract:
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, wherein the coating composition comprisesi) 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 C1 to C36 alkyl vinyl ethers, vinyl esters of C1 to C36 carboxylic acids, and ethylenically unsaturated comonomers copolymerizable therewith, the weight ratio of powder to binder being at least 1:1.5.