# US 12,590,222 B2 · Two-component polyurethane coating composition, coating formed from the two-component polyurethane coating composition and coated article > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,590,222 B2 - Document ID: US12590222B2 - Status: Granted - Kind: B2 - Application number: 18/001,902 - Filed: 2021-07-27 - Published: 2023-07-20 - Granted: 2026-03-31 - Earliest claimed: 2020-07-31 - Assignees: Sherwin-Williams (Guangdong) New Material Co., Ltd. - Applicants: Sherwin-Williams (Guangdong) New Material Co., Ltd. - Inventors: Libin Wu; Yijiang Liu - Web page: https://patentgrep.com/patent/US12590222B2 ## CPC - C08G 18/792: {formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates} - C09D 175/04: Polyurethanes - C08G 18/0852: {the solvents being organic} - C08G 18/0866: {the dispersing or dispersed phase being an aqueous medium} - C08G 18/67: Unsaturated compounds having active hydrogen - C08L 75/04: Polyurethanes - C09D 7/20: Diluents or solvents - C09D 7/63: organic - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON 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) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract The present application relates to a two-component polyurethane coating composition, a coating formed from the two-component polyurethane coating composition and a coated article. The two-component polyurethane coating composition comprises: component A comprising an aqueous dispersion of at least one hydroxyl functional resin; and component B comprising at least one non-hydrophilic isocyanate curing agent and at least one diluent, wherein the at least one diluent comprises at least one alkyl glycol ester, at least one cyclic carbonate ester, or combinations thereof, and the at least one alkyl glycol ester does not have an ether bond. The coated article of the present application comprises the coating formed from the two-component polyurethane coating composition. The coating composition of the invention adopts a low-cost non-hydrophilic curing agent, and the formed coating has improved gloss or transparency. ## Claims ### Claim 1 A two-component polyurethane coating composition comprising: component A comprising an aqueous dispersion of at least one hydroxyl functional resin; and component B comprising at least one non-hydrophilic isocyanate curing agent and at least one diluent, wherein the at least one diluent comprises at least one cyclic carbonate ester, and optionally, at least one alkyl glycol ester that does not have an ether bond; wherein the at least one cyclic carbonate ester comprises ethylene carbonate (EC), propylene carbonate (PC), 1,2-butylene carbonate and 2,3-butylene carbonate, or combinations thereof; wherein the at least one diluent further comprises at least one low boiling point solvent, and the at least one low boiling point solvent has a boiling point of 160° C. or lower, wherein the at least one low boiling point solvent comprises propylene glycol monomethyl ether acetate (PMA), dipropylene glycol dimethyl ether (DMM), methyl ethyl ketone (MEK), acetone, methyl isobutyl ketone, cyclohexanone, toluene, xylene, trimethylbenzene, solvent naphtha 100, 2-methyl propanol acetate (MPA) and n-butyl acetate (BAC), or combination thereof. ### Claim 2 (depends on 1) The two-component polyurethane coating composition according to claim 1, wherein weight ratio of the at least one diluent to the at least one non-hydrophilic isocyanate curing agent is in the range of from 30:70 to 90:10. ### Claim 3 (depends on 1) The two-component polyurethane coating composition according to claim 1, wherein the at least one alkyl glycol ester is present and comprises propylene glycol diacetate (PGDA), ethylene glycol diacetate (EGDA), ethylene glycol dipropionate (EGDP), or combinations thereof. ### Claim 4 (depends on 1) The two-component polyurethane coating composition according to claim 1, wherein the total weight of the at least one cyclic carbonate ester, and the optional at least one alkyl glycol ester when present, is from 10 to 100 wt. %, based on the weight of the at least one diluent. ### Claim 5 (depends on 1) The two-component polyurethane coating composition according to claim 1, wherein the at least one non-hydrophilic isocyanate curing agent comprises at least one aliphatic diisocyanate. ### Claim 6 (depends on 1) The two-component polyurethane coating composition according to claim 1, wherein the component B further comprises at least one hydrophilic isocyanate curing agent. ### Claim 7 (depends on 6) The two-component polyurethane coating composition according to claim 6, wherein the weight ratio of the at least one non-hydrophilic isocyanate curing agent to the at least one hydrophilic isocyanate curing agent is in the range of from 99:1 to 5:95. ### Claim 8 (depends on 1) The two-component polyurethane coating composition according to claim 1, wherein the two-component polyurethane coating composition obtained by mixing the component A and the component B has a particle size of from 10 to 1000 nm. ### Claim 9 (depends on 1) The two-component polyurethane coating composition according to claim 1, wherein the two-component polyurethane coating composition with the component A and the component B is mixed at a shear rate of from 10 to 104 s−1. ### Claim 10 (depends on 9) The two-component polyurethane coating composition according to claim 9, wherein the two-component polyurethane coating composition has a pot life of at least 4 hours after mixing the component A and the component B. ### Claim 11 (depends on 1) A coating formed from the two-component polyurethane coating composition according to claim 1, wherein the coating has a transparency of 95% or higher. ### Claim 12 (depends on 11) A coated article, comprising: a substrate selected from wood, wood composite, metal, plastic, paper, leather, ceramic, inner wall, outer wall, cement board, or combinations thereof; and the coating according to claim 11 at least partially coated on the substrate. ### Claim 13 (depends on 9) The two-component polyurethane coating composition according to claim 9, wherein the two-component polyurethane coating composition with the component A and the component B is mixed at a shear rate of from 102 to 103 s−1.