# US 9,752,046 B2 · Aqueous hydrophilic coating composition capable of forming coating film having excellent self-cleaning ability against stains adhered thereon, and surface-treated material having formed thereon coating film having excellent self-cleaning ability against stains adhered thereon > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,046 B2 - Document ID: US9752046B2 - Status: Granted - Kind: B2 - Application number: 14/777,755 - Filed: 2014-03-05 - Published: 2016-04-28 - Granted: 2017-09-05 - Earliest claimed: 2013-03-21 - Assignees: Nihon Parkerizing Co., Ltd. - Applicants: Nihon Parkerizing Co., Ltd. - Inventors: Katsuyuki Kawakami; Hiroshi Iwasaki; Yasuhiro Kinoshita - Web page: https://patentgrep.com/patent/US9752046B2 ## CPC - C09D 139/06: Homopolymers or copolymers of N-vinyl-pyrrolidones - C08F 230/085: {the monomer being a polymerisable silane, e.g. (meth)acryloyloxy trialkoxy silanes or vinyl trialkoxysilanes} - C08K 3/36: Silica - C08K 9/06: with silicon-containing compounds - C09D 4/00: Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16} - C09D 5/02: Emulsion paints {including aerosols} - C09D 5/084: {Inorganic compounds} - C09D 7/40: Additives - C09D 7/61: inorganic - C09D 129/04: Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids - C09D 133/02: Homopolymers or copolymers of acids; Metal or ammonium salts thereof - C09D 133/26: Homopolymers or copolymers of acrylamide or methacrylamide - C09D 201/00: Coating compositions based on unspecified macromolecular compounds - C09J 133/24: Homopolymers or copolymers of amides or imides - 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) - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H) ## Abstract A water-based hydrophilic coating composition is characterized in that it is obtained by adding to a liquid medium: an inorganic compound (A) with colloidal silica (a) modified with at least one or more of organoalkoxysilane compounds (b) having one or more groups selected from the group consisting of a glycidyl group, a vinyl group and an amino group; a water-soluble resin (B); and amorphous silica (C) represented by M2O.SiO2, where the mass ratio of M2O/SiO2 is from 0.05 to 0.3. ## Claims ### Claim 1 A water-based hydrophilic coating composition obtained by adding to a liquid medium: an inorganic compound (A) having colloidal silica (a) modified with at least one or more of organoalkoxysilane compounds (b) having one or more groups selected from the group consisting of a glycidyl group, a vinyl group and an amino group; a water-soluble resin (B); and amorphous silica (C) represented by M2O·SiO2, wherein M represents an alkali metal and the mass ratio of M2O/SiO2 is from 0.05 to 0.3, and wherein a mass ratio (a/b) of the component (a) to the component (b) in the inorganic compound (A) is from 0.25 to 4. ### Claim 2 (depends on 1) The water-based hydrophilic coating composition according to claim 1, wherein a mass ratio (A/B) of the inorganic compound (A) to the water-soluble resin (B) is from 1.0 to 9.0. ### Claim 3 (depends on 1) The water-based hydrophilic coating composition according to claim 1, wherein a mass ratio (C/[A+B]) of the amorphous silica (C) to the sum of the inorganic compound (A) and water-soluble resin (B) is from 0.05 to 0.2. ### Claim 4 (depends on 1) A method for treating a surface comprising: applying the water-based hydrophilic coating composition according to claim 1 to the surface; and drying the water-based hydrophilic coating composition. ### Claim 5 (depends on 4) The method according to claim 4, wherein a mass ratio (A/B) of the inorganic compound (A) to the water-soluble resin (B) is from 1.0 to 9.0. ### Claim 6 (depends on 4) The method according to claim 4, wherein a mass ratio (C/[A+B]) of the amorphous silica (C) to the sum of the inorganic compound (A) and water-soluble resin (B) is from 0.05 to 0.2. ### Claim 7 (depends on 4) The method according to claim 4, wherein the surface is a surface of a material selected from the group consisting of metals, metallic alloys, plastics and glass, or a surface of a film provided on the material, wherein the film comprises one or more layers. ### Claim 8 (depends on 4) A surface-treated material comprising at least one surface, wherein the surface is treated by the method according to claim 4. ### Claim 9 A water-based hydrophilic coating composition obtained by adding to a liquid medium: an inorganic compound (A) having colloidal silica (a) modified with at least one or more of organoalkoxysilane compounds (b) having one or more groups selected from the group consisting of a glycidyl group, a vinyl group and an amino group; a water-soluble resin (B); and amorphous silica (C) represented by M2O·SiO2, wherein M represents an alkali metal and the mass ratio of M2O/SiO2 is from 0.05 to 0.3, and wherein a mass ratio (A/B) of the inorganic compound (A) to the water-soluble resin (B) is from 2.0 to 9.0. ### Claim 10 (depends on 9) The water-based hydrophilic coating composition according to claim 9, wherein a mass ratio (C/[A+B]) of the amorphous silica (C) to the sum of the inorganic compound (A) and water-soluble resin (B) is from 0.05 to 0.2. ### Claim 11 (depends on 9) A method for treating a surface, comprising: applying the water-based hydrophilic coating composition according to claim 9 to the surface, and drying the water-based hydrophilic coating composition. ### Claim 12 (depends on 11) The method according to claim 11, wherein a mass ratio (C/[A+B]) of the amorphous silica (C) to the sum of the inorganic compound (A) and water-soluble resin (B) is from 0.05 to 0.2. ### Claim 13 (depends on 11) The method according to claim 11, wherein the surface is a surface of a material selected from the group consisting of metals, metallic alloys, plastics and glass, or a surface of a film provided on the material, wherein the film comprises one or more layers. ### Claim 14 (depends on 11) A surface-treated material having at least one surface, wherein the surface is treated by the method according to claim 11.