Hydrophobic coating
First Claim
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1. A coated substrate comprising a substrate and a superhydrophobic film or coating on the substrate, wherein the superhydrophobic film or coating has a static water contact angle above 140°
- and comprises;
(1) a layer comprising raspberry particles, wherein the raspberry particles comprise,a) primary particles, andb) secondary particles, adhered to a surface of the primary particles by covalent chemical bonds and having an average diameter that is smaller than an average diameter of the primary particles, and(2) a hydrophobic upper surface layer covering at least partly a surface of the secondary particles and adhered to the surface of the secondary particles, the upper surface layer having a thickness of from 1 nm to three times the average diameter of the primary particles, whereinthe primary particles or the secondary particles are adhered to the substrate by covalent chemical bonds.
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Abstract
Hydrophobic film or coating, comprising primary particles, secondary particles, adhering to the surface of the primary particles and having an average diameter that is smaller than the average diameter of the primary particles, and a hydrophobic layer covering at least partly the surface of the secondary particles and adhering to that surface, characterized in that the secondary particles are adhering to the surface of the primary particles by covalent chemical bonds.
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11 Claims
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1. A coated substrate comprising a substrate and a superhydrophobic film or coating on the substrate, wherein the superhydrophobic film or coating has a static water contact angle above 140°
- and comprises;
(1) a layer comprising raspberry particles, wherein the raspberry particles comprise, a) primary particles, and b) secondary particles, adhered to a surface of the primary particles by covalent chemical bonds and having an average diameter that is smaller than an average diameter of the primary particles, and (2) a hydrophobic upper surface layer covering at least partly a surface of the secondary particles and adhered to the surface of the secondary particles, the upper surface layer having a thickness of from 1 nm to three times the average diameter of the primary particles, wherein the primary particles or the secondary particles are adhered to the substrate by covalent chemical bonds. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- and comprises;
Specification