Glass coating composition
AssigneeFlexitallic Investments, Inc.
InventorJohn Ashworth
Life of this patent
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Abstract
A glass coating composition for a fuel cell gasket is described. The coating comprises: a glass component effective to form an alkaline solution in the presence of an equivalent amount of water by weight, a binder component, a liquid carrier which is greater than 50% by volume: water, and a retarder effective to inhibit hardening of the composition. The glass coating composition is particularly useful in fuel cell gaskets and provides improved resistance to solidification in an aqueous dispersion.
Claims20
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.
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.
Dependencies are inferred from the claim text.