Glass coating composition

1. A gasket for sealing two mating surfaces of a fuel cell comprising a core layer, said core layer interposed between a first and second coating layer, each of the first and second coating layers comprising a glass coating composition comprising:

a glass component capable of forming an alkaline solution in an equivalent amount of water by weight;

a binder component;

a liquid carrier comprising greater than 50% by volume water; and

a retarder comprising a lignin, lignosulfonate, or a salt thereof; a hydroxycarboxylic acid or salt thereof; a vinyl polymer; a monosaccharide or disaccharide; a fluorate; a borate; or a derivative or mixture thereof.

2. The gasket of claim 1 , wherein the core layer is a resiliently deformable core layer comprising one or more platelet fillers.

3. The gasket of claim 2 , wherein the one or more platelet fillers comprises talc, mica, chemically exfoliated vermiculite, or thermally exfoliated vermiculite.

4. A method of producing or sealing a solid oxide fuel cell comprising incorporating the gasket of claim 1 into the solid oxide fuel cell.

5. The gasket of claim 1 , wherein the glass component comprises particles of glass material.

6. The gasket of claim 1 , wherein the glass component is present in a range of 10-90 wt % of the glass coating composition.

7. The gasket of claim 1 , wherein the glass component comprises SiO 2 , Al 2 O 3 , B 2 O 3 , BaO, Bi 2 O 3 , CaO, Cs 2 O, K 2 O, La 2 O 3 , Li 2 O, MgO, Na 2 O, PbO, Rb 2 O, Sb 2 O 3 , SnO, SrO, TiO 2 , Y 2 O 3 , or ZnO.

8. The gasket of claim 1 , wherein the glass component is of the type which hardens and sets in water.

9. The gasket of claim 1 , wherein the level of retarder in the glass coating composition is between 0.02 to 20 wt % retarder.

10. The gasket of claim 1 , wherein the binder comprises one or more cellulose binders; acrylate homo or copolymers; vinyl acetate homo or copolymers; ethylene copolymers; or polyvinyl butyral.

11. The gasket of claim 10 , wherein the binder comprises one or more acrylate homo or copolymers; or vinyl acetate homo or copolymers.

12. The gasket of claim 1 , wherein the level of binder in the glass coating composition is in a range of 1 to 20 wt %.

13. A gasket for sealing two mating surfaces of a fuel cell, the gasket comprising a core layer interposed between a first coating layer and a second coating layer, wherein the first and second coating layers each comprise a glass component capable of forming an alkaline solution in an equivalent amount of water by weight, and a retarder comprising a lignin, lignosulfonate, or a salt thereof; a hydroxycarboxylic acid or salt thereof; a vinyl polymer; a monosaccharide or disaccharide; a fluorate; a borate; or a derivative or mixture thereof.

14. The gasket of claim 13 , wherein the level of the glass component in each of the first and second coating layers is in a range of between 60 to 99.45 wt % based on a total weight of the coating layer not including any liquid carrier.

15. A fuel cell or fuel cell component comprising the gasket of claim 13 , wherein the retarder comprises a fluorate; a borate; or a derivative or mixture thereof.

16. The gasket of claim 7 , wherein the glass component comprises Al 2 O 3 , B 2 O 3 , BaO, CaO, or ZnO.

17. The gasket of claim 13 , wherein the glass component comprises SiO 2 , Al 2 O 3 , B 2 O 3 , BaO, Bi 2 O 3 , CaO, Cs 2 O, K 2 O, La 2 O 3 , Li 2 O, MgO, Na 2 O, PbO, Rb 2 O, Sb 2 O 3 , SnO, SrO, TiO 2 , Y 2 O 3 , or ZnO.

18. The gasket of claim 17 , wherein the glass component comprises Al 2 O 3 , B 2 O 3 , BaO, CaO, or ZnO.

19. The gasket of claim 13 , wherein the core layer is a resiliently deformable core layer comprising one or more platelet fillers.

20. The gasket of claim 19 , wherein the one or more platelet fillers comprises talc, mica, chemically exfoliated vermiculite, or thermally exfoliated vermiculite.