# US 2026/0217931 A1 · Aqueous composition for barrier coating > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0217931 A1 - Document ID: US20260217931A1 - Status: Published application - Kind: A1 - Application number: 19/573,195 - Filed: 2026-03-20 - Published: 2026-07-30 - Earliest claimed: 2023-09-22 - Applicants: Henkel AG & Co. KGaA - Inventors: Hanns Misiak; Daniela Neitzke; Stefan Tomke - Web page: https://patentgrep.com/patent/US20260217931A1 ## CPC - C08J 7/048: Forming gas barrier coatings - 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 - C08K 9/00: Use of pretreated ingredients - C08L 29/04: Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids - C09D 5/002: {Priming paints (C09D5/08 takes precedence)} - C08J 2329/04: Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids - C08J 2479/08: Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors - C08J 2483/12: containing polyether sequences - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - 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) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract The invention relates to an aqueous composition for barrier coating, in particular an aqueous composition for barrier coating comprising a clay, a vinyl alcohol based polymer, a polyethylene imine and a polyether siloxane copolymer, which is stable under storage conditions after being mixed homogeneously. ## Claims ### Claim 1 An aqueous composition for barrier coating, comprising: (a) a plurality of clay, (b) a vinyl alcohol based polymer, (c) a polyethylene imine, and (d) a polyether siloxane copolymer wherein the vinyl alcohol based polymer is present in an amount of from 5 to 30% by weight of the aqueous composition. ### Claim 2 (depends on 1) The aqueous composition according to claim 1, wherein the plurality of clay is a selected from the group consisting of smectite, montmorillonite, saponite, beidellite, montmorillonite, hectorite, stevensite, vermiculite, kaolinite, hallosite, magadiite, fluorohectorite, and combination thereof. ### Claim 3 (depends on 1) The aqueous composition according to claim 1, wherein at least some of the plurality of clay is intercalated or exfoliated. ### Claim 4 (depends on 1) The aqueous composition according to claim 1, wherein the vinyl alcohol based polymer is selected from polyvinyl alcohol (PVOH), polyvinyl butyral (PVB), butenediol-vinyl alcohol copolymer (BVOH), vinyl acetate-vinyl alcohol copolymer, (meth)acrylate-vinyl alcohol copolymer, and combination thereof. ### Claim 5 (depends on 1) The aqueous composition according to claim 1, wherein the polyethylene imine has a number averaged molecular weight from 10000 to 30000 g/mol. ### Claim 6 (depends on 1) The aqueous composition according to claim 1, wherein the polyether siloxane copolymer is a copolymer of a polydimethylsiloxane with ethylene oxide and/or propylene oxide segments. ### Claim 7 (depends on 1) The aqueous composition according to claim 1, wherein the composition comprises no more than 1% by weight of a solvent other than water, based on the weight of the aqueous composition. ### Claim 8 (depends on 1) The aqueous composition according to claim 1, wherein the plurality of clay is present in an amount of from 0.1 to 5% by weight of the composition. ### Claim 9 (canceled) ### Claim 10 (depends on 1) The aqueous composition according to claim 1, wherein the polyethylene imine is present in an amount of from 0.2 to 0.8% by weight of the composition. ### Claim 11 (depends on 1) The aqueous composition according to claim 1, wherein the polyether siloxane copolymer is present in an amount of from 0.2 to 0.8% by weight of the composition. ### Claim 12 (depends on 1) The aqueous composition according to claim 1, wherein the aqueous composition is storage stable for at least 60 days. ### Claim 13 (depends on 1) A method for preparing an aqueous composition for barrier coating according to claim 1, comprising: (a) providing 0.05 to 10% by weight of a plurality of clay, 5 to 30% of a vinyl alcohol based polymer and 0.1 to 1% by weight of a polyether siloxane copolymer, (b) mixing the components in step (a) in water, and obtain a mixture, and (c) providing 0.05 to 1% by weight of a polyethylene imine and mixing the polyethylene imine with the mixture in step (b) and obtain a homogeneous aqueous composition wherein the % weight is based on the aqueous composition. ### Claim 14 A barrier film comprising a flexible polymer film coated with a barrier coating comprising (a) a plurality of hectorite clay, (b) a polyvinyl alcohol polymer, (c) a polyethylene imine with a number averaged molecular weight from 10000 to 30000 q/mol, and (d) a copolymer of a polydimethylsiloxane with ethylene oxide and/or propylene oxide segments. ### Claim 15 (depends on 1) A method for preparing a barrier film, comprising: (a) coating a flexible polymer film with aqueous composition for barrier coating according to claim 1, and (b) allowing the barrier coating to dry.