Patent attributes
Nanoporous silica particles having a plurality of pores are mixed with a protective liquid which fills the pores to provide a protected particle mixture. The protected particle mixture is combined with a resin to provide a liquid coating precursor composition. The coating precursor composition is applied to the substrate, and the protective liquid is evaporated. The evaporating protective liquid forms a plurality of passages through the resin. Some of the passages percolate to an outer surface of the resin. Some of the nanoporous particles are distributed at walls of the passages, some of the nanoporous particles are embedded within the resin, and some of the nanoporous particles extend beyond the outer surface of the resin to form a superhydrophobic surface. The resin is cured to solidify the resin and to adhere the resin to the surface and to the particles. A composition and an article are also disclosed.
