# US 2014/0155522 A1 · Durable superhydrophobic coatings > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0155522 A1 - Document ID: US20140155522A1 - Status: Published application - Kind: A1 - Application number: 13/793,394 - Filed: 2013-03-11 - Published: 2014-06-05 - Earliest claimed: 2012-09-28 - Assignees: UT-Battelle, LLC - Applicants: Ut-Battelle, LLC - Inventors: John T. SIMPSON; Georgios POLYZOS; Daniel A. SCHAEFFER - Web page: https://patentgrep.com/patent/US20140155522A1 ## CPC - C09D 7/62: modified by treatment with other compounds - C08K 7/24: inorganic - C08K 7/26: Silicon- containing compounds - C09D 5/00: Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes - C09D 5/031: {characterised by particle size or shape} - C09D 5/1681: {Antifouling coatings characterised by surface structure, e.g. for roughness effect giving superhydrophobic coatings or Lotus effect} - C09D 127/22: modified by chemical after-treatment - C09D 163/00: Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins - C09D 167/00: Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain (based on polyester-amides C09D177/12; based on polyester-imides C09D179/08); Coating compositions based on derivatives of such polymers - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) ## Abstract A superhydrophobic coating including a plurality of particles and a resin. The particles covalently bond to the resin and the resin does not fill the pores of the superhydrophobic particles such that the three dimensional surface topology of the superhydrophobic particles is preserved. ## Claims ### Claim 1 A superhydrophobic coating, comprising: a resin; and a plurality of particles each comprising: at least one superhydrophobic region, and at least one hydrophilic region, wherein each particle has a three dimensional, nanostructured surface topology, defining a plurality of pores, wherein the particles are covalently bonded to the resin via the at least one hydrophilic region, wherein the resin does not fill the pores of the particles such that the three dimensional surface topology of the particles is preserved, and wherein the plurality of particles render at least one surface of the resin superhydrophobic. ### Claim 2 (depends on 1) The superhydrophobic coating of claim 1, wherein at least a portion of the superhydrophobic particles are embedded within the resin so as to be surrounded by the resin. ### Claim 3 (depends on 1) The superhydrophobic coating of claim 1, wherein the resin is hydrophobic. ### Claim 4 (depends on 1) The superhydrophobic coating of claim 1, wherein each particle comprises a hydrophobic coating, the hydrophobic coating conforming to the surface of the superhydrophobic particle so as to preserve the nanostructured surface topology. ### Claim 5 (depends on 4) The superhydrophobic coating of claim 4, wherein the superhydrophobic particle comprises a diatomaceous earth particle. ### Claim 6 (depends on 1) The superhydrophobic coating of claim 1, wherein the porous core is hydrophilic. ### Claim 7 (depends on 1) The superhydrophobic coating of claim 1, wherein the porous core is a silicate. ### Claim 8 (depends on 7) The superhydrophobic coating of claim 7, wherein the silicate is etched to provide the nanostructured surface topology. ### Claim 9 (depends on 1) The superhydrophobic coating of claim 1, wherein the pore volume of each particle is less than 50% filled by the resin. ### Claim 10 (depends on 1) The superhydrophobic coating of claim 1, wherein the diameter of each particle is between 1-20 μm. ### Claim 11 (depends on 1) The superhydrophobic coating of claim 1, wherein the diameter of each particle is between 10-20 μm. ### Claim 12 (depends on 1) The superhydrophobic coating of claim 1, wherein the ratio of particles to resin is between 1:1 and 1:10, by volume. ### Claim 13 (depends on 1) The superhydrophobic coating of claim 1, wherein the at least one superhydrophobic region comprises a chemical moiety selected from the group consisting of a fluoromonomer, a paraffinic hydrocarbon monomer, and combinations thereof. ### Claim 14 (depends on 14) The superhydrophobic coating of claim 14, wherein the fluoromonomer is (heptadecafluoro-1,1,2,2-tetrahydrodecyl)trichlorosilane. ### Claim 15 (depends on 14) The superhydrophobic coating of claim 14, wherein the paraffinic hydrocarbon monomer is an alkyl-based silane. ### Claim 16 (depends on 1) The superhydrophobic coating of claim 1, wherein the at least one hydrophilic region comprises a chemical moiety selected from the group consisting of a silane comprising at least one functional group. ### Claim 17 (depends on 16) The superhydrophobic coating of claim 16, wherein the at least one functional group is selected from the group consisting of (3-glycidoxypropyl)trimethoxysilane, (3-trimethoxysilylpropyl)diethylene-triamine, and combinations thereof. ### Claim 18 A method for producing amphoteric particles, the method comprising reacting a plurality of particulates comprising silica with both at least one superhydrophobic silane and at least one coupling agent to form a plurality of amphoteric particles, wherein each amphoteric particle comprises at least one superhydrophobic region, and at least one hydrophilic region. ### Claim 19 (depends on 18) The method of claim 18, wherein the reaction occurs in a single stage. ### Claim 20 (depends on 18) The method of claim 18, wherein the reaction occurs in a first stage and a second stage, wherein during the first stage the plurality of particulates are reacted with the at least one superhydrophobic silane, and wherein during the second stage the plurality of particulates are reacted with the at least one coupling agent. ### Claim 21 (depends on 18) The method of claim 18, wherein the at least one superhydrophobic region comprises a chemical moiety selected from the group consisting of a fluoromonomer, a paraffinic hydrocarbon monomer, and combinations thereof. ### Claim 22 (depends on 21) The method of claim 21, wherein the fluoromonomer is (heptadecafluoro-1,1,2,2-tetrahydrodecyl)trichlorosilane. ### Claim 23 (depends on 18) The method of claim 18, wherein coupling agent is a paraffinic hydrocarbon monomer. ### Claim 24 (depends on 23) The method of claim 23, wherein the paraffinic hydrocarbon monomer is an alkyl-based silane. ### Claim 25 (depends on 18) The method of claim 18, wherein the at least one hydrophilic region comprises a chemical moiety selected from the group consisting of a silane comprising at least one functional group. ### Claim 26 (depends on 25) The superhydrophobic coating of claim 25, wherein the at least one functional group is selected from the group consisting of (3-glycidoxypropyl)trimethoxysilane, (3-trimethoxysilylpropyl)diethylene-triamine, and combinations thereof. ### Claim 27 A method for producing a superhydrophobic coating, the method comprising dispersing a solution a plurality of amphoteric particulates in a solution comprising a polymeric binder, wherein each amphoteric particle comprises at least one superhydrophobic region, and at least one hydrophilic region, wherein the polymeric binder comprises a plurality of functional groups capable of covalently bonding to the at least one hydrophilic region of each amphoteric particle.