# US 2019/0169442 A1 · Aqueous coating composition and process of making the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0169442 A1 - Document ID: US20190169442A1 - Status: Published application - Kind: A1 - Application number: 15/774,094 - Filed: 2015-12-14 - Published: 2019-06-06 - Earliest claimed: 2015-12-14 - Assignees: Dow Global Technologies LLC; Rohm and Haas Company - Applicants: Dow Global Technologies LLC; Rohm and Haas Company - Inventors: Caifeng Wang; Jianming Xu; Yujiang Wang; Yunfei Lan - Web page: https://patentgrep.com/patent/US20190169442A1 ## CPC - C08F 220/1808: {C8-(meth)acrylate, e.g. isooctyl (meth)acrylate or 2-ethylhexyl (meth)acrylate} - C08F 2/001: {Multistage polymerisation processes characterised by a change in reactor conditions without deactivating the intermediate polymer (C08F295/00, C08F297/00 take precedence)} - C08F 2/24: with the aid of emulsifying agents - C08F 2/44: Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers - C08F 220/14: Methyl esters {, e.g. methyl (meth)acrylate} - C09D 5/022: {Emulsions, e.g. oil in water} - C09D 5/024: {characterised by the additives} - C09D 7/61: inorganic - C09D 133/064: {containing anhydride, COOH or COOM groups, with M being metal or onium-cation} - C09D 133/10: Homopolymers or copolymers of methacrylic acid esters - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS - 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) ## Abstract The present invention provides a novel aqueous coating composition comprising a multi-stage aqueous emulsion polymer, an anionic colloidal silica, and a thickener. This novel aqueous coating composition provides low gloss, while maintaining good physical stability and transparency. ## Claims ### Claim 1 An aqueous coating composition comprising, (a) a multi-stage aqueous emulsion polymer comprising: from 20% to 80% by weight, based on dry weight of the multi-stage aqueous emulsion polymer, of a first polymer having an acid number of from 9 to 33, said first polymer having a calculated Mn of from 50,000 to 1,000,000; and from 80% to 20% by weight, based on dry weight of the multi-stage aqueous emulsion polymer, of a second polymer having an acid number from 0 to 7, said second polymer having a calculated Mn of from 50,000 to 1,000,000; (b) an anionic colloidal silica; and (c) a thickener. ### Claim 2 (depends on 1) The aqueous coating composition of claim 1, wherein the multi-stage aqueous emulsion polymer is present in an amount from 46% to 85% by weight, based on solid weight of the aqueous coating composition. ### Claim 3 (depends on 1) The aqueous coating composition of claim 1, wherein the first polymer has an acid number of from 13 to 26. ### Claim 4 (depends on 1) The aqueous coating composition of claim 1, wherein the second polymer has an acid number of from 0 to 5. ### Claim 5 (depends on 1) The aqueous coating composition of claim 1, wherein first polymer of the multi-stage aqueous emulsion polymer has a glass transition temperature of from −36° C. to 50° C. ### Claim 6 (depends on 1) The aqueous coating composition of claim 1, wherein second polymer of the multi-stage aqueous emulsion polymer has a glass transition temperature of from 30° C. to 100° C. ### Claim 7 (depends on 1) The aqueous coating composition of claim 1, wherein the multistage emulsion polymer has a silane coupling agent from 0.1 to 5%, based on solid weight of the aqueous coating composition. ### Claim 8 (depends on 1) The aqueous coating composition of claim 1, wherein the anionic colloidal silica is present in an amount from 10% to 53% by weight, based on solid weight of the aqueous coating composition. ### Claim 9 (depends on 1) The aqueous coating composition of claim 1, wherein the anionic colloidal silica has a pH value of greater than 8.5. ### Claim 10 (depends on 1) The aqueous coating composition of claim 1, wherein the thickener is an alkali-based thickener. ### Claim 11 (depends on 5) The aqueous coating composition of claim 5, wherein the alkali-based thickener is alkali swellable emulsion. ### Claim 12 (depends on 5) The aqueous coating composition of claim 5, wherein the alkali-based thickener is hydrophobically modified alkali swellable emulsion. ### Claim 13 (depends on 1) The aqueous coating composition of claim 1, wherein the thickener is present in an amount of from 1% to 5% by weight, based on solid weight of the aqueous coating composition. ### Claim 14 A method for providing a coating comprising, (a) forming an aqueous coating composition comprising (1) a multi-stage aqueous emulsion polymer comprising: from 20% to 80% by weight, based on dry weight of the multi-stage aqueous emulsion polymer, of a first polymer having an acid number of from 9.81 to 32.7, said first polymer having a calculated Mn of from 50,000 to 1,000,000; and from 80% to 20% by weight, based on dry weight of said multi-stage aqueous emulsion polymer, of a second polymer having an acid number from 0 to 6.54, said second polymer having a calculated Mn of from 50,000 to 1,000,000; (2) an anionic colloidal silica; and (3) a thickener; (b) applying the aqueous coating composition to a substrate; and (c) drying, or allowing to dry, said applied aqueous coating composition.