Coating composition and cooking appliance

Patent metadata

Field	Value
Publication number	US-10647609-B2
Application number	US-201816211402-A
Country	US
Kind code	B2
Filing date	Dec 6, 2018
Priority date	Dec 6, 2017
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

A coating composition may include a glass frit including Phosphorus Oxide (P 2 O 5 ), Silicon Oxide (SiO 2 ), Boron Oxide (B 2 O 3 ), 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 P 2 O 5 may be included by about 40 wt % to about 55 wt % based on a total weight of the glass frit. The SiO 2 may be included by about 5 wt % to about 15 wt % based on the total weight of the glass frit. The B 2 O 3 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 TiO 2 may be included by about 0.1 wt % to about 5 wt % based on the total weight of the glass frit.

First claim

What is claimed is:

1. A coating composition, comprising:
a glass frit including Phosphorus Pentoxide (P 2 O 5 ), Silicon Dioxide (SiO 2 ), Boron Oxide (B 2 O 3 ), 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 P 2 O 5 is included by about 40 wt % to about 55 wt % based on a total weight of the glass frit, wherein the SiO 2 is included by about 5 wt % to about 15 wt % based on the total weight of the glass frit, wherein the B 2 O 3 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 TiO 2 is included by about 0.1 wt % to about 5 wt % based on the total weight of the glass fit.

2. 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.

3. The coating composition of claim 1 , wherein the TiO 2 is included by about 10% to about 30% based on a weight of the ZnO.

4. The coating composition of claim 1 , wherein the group I-based metal oxide includes Sodium Oxide (Na 2 O) and Potassium Oxide (K 2 O).

5. 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 (Co 3 O 4 ), Nickel Oxide (NiO), Iron Oxide (Fe 2 O 3 ) and Manganese Dioxide (MnO 2 ), 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.

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 (P 2 O 5 ), Silicon Dioxide (SiO 2 ), Boron Oxide (B 2 O 3 ), a group I-based metal oxide, Barium Oxide (BaO), Sodium Fluoride (NaF), Titanium Oxide (TiO 2 ), Stannous Oxide (SnO), Zinc Oxide (ZnO), and an adhesion enhancement component, wherein the P 2 O 5 is included by about 40 wt % to about 55 wt % based on a total weight of the glass frit, wherein the SiO 2 is included by about 5 wt % to about 15 wt % based on the total weight of the glass frit, wherein the B 2 O 3 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 TiO 2 is included by about 0.1 wt % to about 5 wt % based on the total weight of the glass frit.

7. The cooking appliance of claim 6 , further comprising:
a buffer layer interposed between the metallic base material and the functional layer.

8. The cooking appliance of claim 7 , wherein the buffer layer comprises an adhesive layer.

9. 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.

10. The cooking appliance of claim 6 , wherein the TiO 2 is included by about 10% to about 30% based on a weight of the ZnO.

11. The cooking appliance of claim 6 , wherein the group I-based metal oxide includes Sodium Oxide (Na 2 O) and Potassium Oxide (K 2 O).

12. 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 (Co 3 O 4 ), Nickel Oxide (NiO), Iron Oxide (Fe 2 O 3 ) and Manganese Dioxide (MnO 2 ), 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.

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 (P 2 O 5 ), Silicon Dioxide (SiO 2 ), Boron Oxide (B 2 O 3 ), a group I-based metal oxide, Barium Oxide (BaO), Sodium Fluoride (NaF), Titanium Oxide (TiO 2 ), Stannous Oxide (SnO), Zinc Oxide (ZnO), and an adhesion enhancement component, wherein the P 2 O 5 is included by about 40 wt % to about 55 wt % based on a total weight of the glass frit, wherein the SiO 2 is included by about 5 wt % to about 15 wt % based on the total weight of the glass frit, wherein the B 2 O 3 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 TiO 2 is included by about 0.1 wt % to about 5 wt % based on the total weight of the glass frit.

14. 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 P 2 O 5 , the SiO 2 , the B 2 O 3 , the group I-based metal oxide, the BaO, the NaF, the TiO 2 , the SnO, the ZnO, and the adhesion enhancement component.

15. The cooking appliance of claim 14 , wherein the buffer layer comprises an adhesive layer.

16. 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.

17. The cooking appliance of claim 13 , wherein the TiO 2 is included by about 10% to about 30% based on a weight of the ZnO.

18. The cooking appliance of claim 13 , wherein the group I-based metal oxide includes Sodium Oxide (Na 2 O) and Potassium Oxide (K 2 O).

19. 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 (Co 3 O 4 ), Nickel Oxide (NiO), Iron Oxide (Fe 2 O 3 ) and Manganese Dioxide (MnO 2 ), 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.

Assignees

• Lg Electronics Inc

Inventors

• Choi Wongyu
• Kim Youngseok
• Choi Suyeon

Classifications

• C23D7/00

  Treating the coatings, e.g. drying before burning · CPC title

• C23D1/00

  Melting or fritting the enamels; Apparatus or furnaces therefor · CPC title

• C03C2207/04

  for steel · CPC title

• C03C2205/04

  for self-cleaning enamels or glazes · CPC title

• F24C15/02

  Doors specially adapted for stoves or ranges · CPC title