Enamel composition, manufacturing method therefor, and cooking utensils

Patent metadata

Field	Value
Publication number	US-11964910-B2
Application number	US-201917048464-A
Country	US
Kind code	B2
Filing date	Apr 17, 2019
Priority date	Apr 17, 2018
Publication date	Apr 23, 2024
Grant date	Apr 23, 2024

Abstract

The present invention relates to an enamel composition capable of implementing cleaning without swelling using moisture, to a manufacturing method therefor, and to cooking utensils. The enamel composition according to the present invention comprises: 20-60 wt % of P 2 O 5 ; 1-20 wt % of SiO 2 ; 1-30 wt % of B 2 O 3 ; 10-30 wt % of at least one of Li 2 O, Na 2 O, and K 2 O; 10-40 wt % of at least one selected from the group consisting of post-transition metal oxides and transition metal oxides. Therefore, the present invention provides an enamel composition capable of implementing cleaning without swelling using moisture, a manufacturing method therefor, and cooking utensils.

First claim

The invention claimed is:

1. An enamel composition, comprising:
20 wt % to 60 wt % of phosphorus pentoxide (P 2 O 5 );
1 wt % to 20 wt % of silicon dioxide (SiO 2 );
1 wt % to 30 wt % of boron trioxide (B 2 O 3 );
10 wt % to 30 wt % of at least one of lithium oxide (Li 2 O), sodium oxide (Na 2 O), and potassium oxide (K 2 O); and
10 wt % to 40 wt % of at least one from a group consisting of post-transition metal oxides and transition metal oxides such that the enamel composition comprises 5 wt % to 20 wt % of zinc oxide (ZnO) and 1 wt % to 20 wt % of molybdenum trioxide (MoO 3 ).

2. The enamel composition of claim 1 , wherein the post-transition metal oxides comprise Bi 2 O 3 , and
wherein the transition metal oxides further comprise at least one of titanium oxide (TiO 2 ), vanadium oxide (V 2 O 5 ), manganese oxide (MnO), iron oxide (Fe 2 O 3 ), copper oxide (CuO), or tungsten trioxide (WO 3 ).

3. The enamel composition of claim 1 , wherein the enamel composition further comprises Group II oxides, and
wherein the Group II oxides comprise at least one of magnesium oxide (MgO), barium oxide (BaO) or calcium oxide (CaO).

4. The enamel composition of claim 1 , further comprising at least one of sodium fluoride (NaF), calcium fluoride (CaF2), aluminum fluoride (AlF 3 ).

5. The enamel composition of claim 1 , wherein an amount of P 2 O 5 and an amount of B 2 O 3 satisfy a formula below;
1≤P 2 O 5 (wt %)/B 2 O 3 (wt %)≤10   [Formula ].

6. A preparation method for an enamel composition, comprising:
supplying materials for the enamel composition, the enamel composition including 20 wt % to 60 wt % of phosphorus pentoxide (P 2 O 5 ), 1 wt % to 20 wt % of silicon dioxide (SiO 2 ), 1 wt % to 30 wt % of boron trioxide (B 2 O 3 ), and 10 wt % to 30 wt % of at least one of lithium oxide (Li 2 O), sodium oxide (Na 2 O), and potassium oxide (K 2 O), and 10 wt % to 40 wt % of at least one from a group consisting of post-transition metal oxides and transition metal oxides such that the enamel composition includes 5 wt % to 20 wt % of zinc oxide (ZnO) and 1 wt % to 20 wt % of molybdenum trioxide (MoO 3 );
melting the materials for the enamel composition; and
cooling the melted materials in a quenching roller and forming the enamel composition.

7. An enamel composition, comprising:
20 wt % to 60 wt % of phosphorus pentoxide (P 2 O 5 );
1 wt % to 20 wt % of silicon dioxide (SiO 2 );
1 wt % to 30 wt % of boron trioxide (B 2 O 3 );
10 wt % to 30 wt % of at least one of lithium oxide (Li 2 O), sodium oxide (Na 2 O), or potassium oxide (K 2 O);
5 wt % to 20 wt % of zinc oxide (ZnO); and
1 wt % to 20 wt % of molybdenum trioxide (MoO 3 ).

8. The enamel composition of claim 7 , further comprising 10 wt % to 20 wt % of bismuth oxide (Bi 2 O 3 ).

Assignees

• Lg Electronics Inc

Inventors

• Gwoo Dong Gun
• Kim Young Seok

Classifications

• C03C8/08 Primary

  containing phosphorus · CPC title

• C03C8/06

  containing halogen · CPC title

• C23D1/02

  Granulating the melt; Drying the granules · CPC title

• F24C15/005

  Coatings for ovens · CPC title

• C03C8/10

  containing lead · CPC title