Catalytic coating composition
AssigneeE. I. Du Pont de Nemours and Company
InventorWilliam Owen Roberts
Life of this patent
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Abstract
A composition for applying an easily removable coating of oxidative catalyst to solid substrates comprising finely divided catalytic oxidation metal solids dispersed in an aqueous solution of alkaline silicate in which is dissolved a vicinal alkane polyol. The composition contains 10-40 pbw alkaline silicate per 100 pbw of catalytic oxidation metal and other water insoluble solids and 40-125 pbw polyol per 100 pbw of alkaline silicate.
Claims12
A composition for applying an oxidation catalyst coating to the surface of a solid substrate comprising (a) finely divided catalytic metal oxides dispersed in (b) an aqueous solution of alkaline silicate in which is dissolved (c) a vicinal alkane polyol, the amount of alkaline silicate corresponding to 10-40 pbw per 100 of any waterinsoluble solids in the composition and the amount of polyol corresponding to 40-125 pbw per 100 pbw alkaline silicate, dry basis, in the composition.
The method of preparing a catalytic oxidation surface comprising
- 1. applying to the surface of a solid substrate a coating comprising (a) finely divided catalytic metal oxides dispersed in (b) an aqueous solution of alkaline silicate in which is dissolved (c) a vicinal alkane polyol, the amount of alkaline silicate corresponding to 10-40 pbw per 100 pbw of dry water-insoluble solids in the composition and the amount of polyol corresponding to 40-125 pbw per 100 pbw dry alkaline silicate, dry basis, in the composition;
- 2. drying the applied coating;
- and
- 3. curing the dried coating for a period of at least about 30 minutes at a temperature of 150.degree.-280.degree. C.
An assemblage for the preparation of oxidation catalyst coating compositions comprising (a) a first container of finely divided catalytic metal oxides and (b) a second container of an aqueous solution of alkaline silicate in which is dissolved vicinal alkane polyol,the amount of alkaline silicate corresponding to 10-40 pbw per 100 pbw of dry water-insoluble solids in the first container and the amount of polyol corresponding to 40-125 pbw per 100 pbw of dry alkaline silicate, dry basis, in the second container.
Dependencies are inferred from the claim text.