# US 2019/0169065 A1 · Coating composition and cooking appliance > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0169065 A1 - Document ID: US20190169065A1 - Status: Published application - Kind: A1 - Application number: 16/211,402 - Filed: 2018-12-06 - Published: 2019-06-06 - Earliest claimed: 2017-12-06 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Wongyu CHOI; Youngseok KIM; Suyeon CHOI - Web page: https://patentgrep.com/patent/US20190169065A1 ## CPC - C03C 8/14: Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions - C03C 3/066: containing zinc - C03C 8/08: containing phosphorus - F24C 15/005: {Coatings for ovens} - F24C 15/02: Doors specially adapted for stoves or ranges - F27D 1/0003: {Linings or walls} - C03C 2204/02: Antibacterial glass, glaze or enamel - C03C 2205/02: for opaque enamels or glazes - C03C 2205/04: for self-cleaning enamels or glazes - C03C 2207/02: containing ingredients for securing a good bond between the vitrified enamel and the metal - C03C 2207/04: for steel - C23D 1/00: Melting or fritting the enamels; Apparatus or furnaces therefor - C23D 7/00: Treating the coatings, e.g. drying before burning - C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS - F24C: DOMESTIC STOVES OR RANGES (exclusively for solid fuels F24B); DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION - F27D: DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE - C23D: ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS ## Abstract A coating composition may include a glass frit including Phosphorus Oxide (P2O5), Silicon Oxide (SiO2), Boron Oxide (B2O3), a group I-based metal oxide, Barium Oxide (BaO), Sodium Fluoride (NaF), Titanium Oxide (TiO2), Stannous Oxide (SnO), Zinc Oxide (ZnO), and an adhesion enhancement component. The P2O5 may be included by about 40 wt % to about 55 wt % based on a total weight of the glass frit. The SiO2 may be included by about 5 wt % to about 15 wt % based on the total weight of the glass frit. The B2O3 may be included by about 5 wt % to about 10 wt % based on the total weight of the glass frit. The group I-based metal oxide may be included by about 3 wt % to about 10 wt % based on the total weight of the glass frit. The ZnO may be included by about 10 wt % to about 25 wt % based on the total weight of the glass frit, and the TiO2 may be included by about 0.1 wt % to about 5 wt % based on the total weight of the glass frit. ## Claims ### Claim 1 A coating composition, comprising: a glass frit including Phosphorus Pentoxide (P2O5), Silicon Dioxide (SiO2), Boron Oxide (B2O3), a group I-based metal oxide, Barium Oxide (BaO), Sodium Fluoride (NaF), Titanium Oxide (TiO2), Stannous Oxide (SnO), Zinc Oxide (ZnO), and an adhesion enhancement component, wherein the P2O5 is included by about 40 wt % to about 55 wt % based on a total weight of the glass frit, wherein the SiO2 is included by about 5 wt % to about 15 wt % based on the total weight of the glass frit, wherein the B2O3 is included by about 5 wt % to about 10 wt % based on the total weight of the glass frit, wherein the group I-based metal oxide is included by about 3 wt % to about 10 wt % based on the total weight of the glass frit, wherein the ZnO is included by about 10 wt % to about 25 wt % based on the total weight of the glass frit, and wherein the TiO2 is included by about 0.1 wt % to about 5 wt % based on the total weight of the glass fit. ### Claim 2 (depends on 1) The coating composition of claim 1, wherein the BaO is included by about 0.1 wt % to about 5 wt % based on the total weight of the glass frit, wherein the NaF is included by about 0.1 wt % to about 2 wt % based on the total weight of the glass fit, and wherein the SnO is included by about 0.1 wt % to about 2 wt % based on the total weight of the glass frit. ### Claim 3 (depends on 1) The coating composition of claim 1, wherein the TiO2 is included by about 10% to about 30% based on a weight of the ZnO. ### Claim 4 (depends on 1) The coating composition of claim 1, wherein the group I-based metal oxide includes Sodium Oxide (Na2O) and Potassium Oxide (K2O). ### Claim 5 (depends on 1) The coating composition of claim 1, wherein the adhesion enhancement component includes a metal oxide having at least one selected from the group of Cobalt Oxide (Co3O4), Nickel Oxide (NiO), Iron Oxide (Fe2O3) and Magnesium Dioxide (MnO2), and wherein the adhesion enhancement component is included by about 0.1 wt % to about 4 wt % based on the total weight of the glass frit. ### Claim 6 A cooking appliance, comprising: a cavity having a cooking chamber; a door to selectively open/close the cooking chamber; and at least one heating source that provides heat for heating an object to be cooked in the cooking chamber, wherein at least one of the cavity or the door includes: a metallic base material; and a functional layer on the metallic base material, wherein the functional layer includes Phosphorus Pentoxide (P2O5), Silicon Dioxide (SiO2), Boron Oxide (B2O3), a group I-based metal oxide, Barium Oxide (BaO), Sodium Fluoride (NaF), Titanium Oxide (TiO2), Stannous Oxide (SnO), Zinc Oxide (ZnO), and an adhesion enhancement component, wherein the P2O5 is included by about 40 wt % to about 55 wt % based on a total weight of the glass frit, wherein the SiO2 is included by about 5 wt % to about 15 wt % based on the total weight of the glass frit, wherein the B2O3 is included by about 5 wt % to about 10 wt % based on the total weight of the glass frit, wherein the group I-based metal oxide is included by about 3 wt % to about 10 wt % based on the total weight of the glass frit, wherein the ZnO is included by about 10 wt % to about 25 wt % based on the total weight of the glass frit, and wherein the TiO2 is included by about 0.1 wt % to about 5 wt % based on the total weight of the glass frit. ### Claim 7 (depends on 6) The cooking appliance of claim 6, further comprising: a buffer layer interposed between the metallic base material and the functional layer. ### Claim 8 (depends on 7) The cooking appliance of claim 7, wherein the buffer layer comprises an adhesive layer. ### Claim 9 (depends on 6) The cooking appliance of claim 6, wherein the BaO is included by about 0.1 wt % to about 5 wt % based on the total weight of the glass frit, wherein the NaF is included by about 0.1 wt % to about 2 wt % based on the total weight of the glass frit, and wherein the SnO is included by about 0.1 wt % to about 2 wt % based on the total weight of the glass frit. ### Claim 10 (depends on 6) The cooking appliance of claim 6, wherein the TiO2 is included by about 10% to about 30% based on a weight of the ZnO. ### Claim 11 (depends on 6) The cooking appliance of claim 6, wherein the group I-based metal oxide includes Sodium Oxide (Na2O) and Potassium Oxide (K2O). ### Claim 12 (depends on 6) The cooking appliance of claim 6, wherein the adhesion enhancement component includes a metal oxide having at least one selected from the group of Cobalt Oxide (Co3O4), Nickel Oxide (NiO), Iron Oxide (Fe2O3) and Magnesium Dioxide (MnO2), and wherein the adhesion enhancement component is included by about 0.1 wt % to about 4 wt % based on the total weight of the glass frit. ### Claim 13 A cooking appliance, comprising: a cavity having a cooking chamber; a door to selectively open/close the cooking chamber; and at least one heating source that provides heat for heating an object to be cooked in the cooking chamber, wherein at least one of the cavity or the door is coated with a coating composition comprising Phosphorus Pentoxide (P2O5), Silicon Dioxide (SiO2), Boron Oxide (B2O3), a group I-based metal oxide, Barium Oxide (BaO), Sodium Fluoride (NaF), Titanium Oxide (TiO2), Stannous Oxide (SnO), Zinc Oxide (ZnO), and an adhesion enhancement component, wherein the P2O5 is included by about 40 wt % to about 55 wt % based on a total weight of the glass frit, wherein the SiO2 is included by about 5 wt % to about 15 wt % based on the total weight of the glass frit, wherein the B2O3 is included by about 5 wt % to about 10 wt % based on the total weight of the glass frit, wherein the group I-based metal oxide is included by about 3 wt % to about 10 wt % based on the total weight of the glass frit, wherein the ZnO is included by about 10 wt % to about 25 wt % based on the total weight of the glass frit, and wherein the TiO2 is included by about 0.1 wt % to about 5 wt % based on the total weight of the glass frit. ### Claim 14 (depends on 13) The cooking appliance of claim 13, wherein the coating composition comprises: a metallic base material; a functional layer on the metallic base material; and a buffer layer interposed between the metallic base material and the functional layer, wherein the functional layer includes the P2O5, the SiO2, the B2O3, the group I-based metal oxide, the BaO, the NaF, the TiO2, the SnO, the ZnO, and the adhesion enhancement component. ### Claim 15 (depends on 14) The cooking appliance of claim 14, wherein the buffer layer comprises an adhesive layer. ### Claim 16 (depends on 13) The cooking appliance of claim 13, wherein the BaO is included by about 0.1 wt % to about 5 wt % based on the total weight of the glass frit, wherein the NaF is included by about 0.1 wt % to about 2 wt % based on the total weight of the glass frit, and wherein the SnO is included by about 0.1 wt % to about 2 wt % based on the total weight of the glass frit. ### Claim 17 (depends on 13) The cooking appliance of claim 13, wherein the TiO2 is included by about 10% to about 30% based on a weight of the ZnO. ### Claim 18 (depends on 13) The cooking appliance of claim 13, wherein the group I-based metal oxide includes Sodium Oxide (Na2O) and Potassium Oxide (K2O). ### Claim 19 (depends on 13) The cooking appliance of claim 13, wherein the adhesion enhancement component includes a metal oxide having at least one selected from the group of Cobalt Oxide (Co3O4), Nickel Oxide (NiO), Iron Oxide (Fe2O3) and Magnesium Dioxide (MnO2), and wherein the adhesion enhancement component is included by about 0.1 wt % to about 4 wt % based on the total weight of the glass frit.