Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1975-02-26
1976-11-23
Dees, Carl F.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252457, 252458, 252459, 252471, 126 19R, B01J 2900, B01J 2910, B01J 2920
Patent
active
039935973
ABSTRACT:
A catalyst composition for coating surfaces of cooking devices exposed to cooking residues is disclosed. The composition contains (1) from about 10-94% by weight of a catalytic metal oxide selected from the group consisting of the oxides of cobalt, chromium, iron, nickel, manganese, copper, zinc, the rare earths, and mixtures thereof in the form of particles having a size of less than 35 microns and said oxide having a surface area of about 5-150 square meters per gram, with the proviso that when the oxide is manganese oxide from 0-80% by weight of said oxide can have a surface area in excess of about 150 square meters per gram; (2) at least 1% by weight on a dry basis of an alkaline silicate, said alkaline silicate being in the form of an aqueous solution; and (3) from about 0-20% by weight of a carbonate or hydroxide of one or more metals of said catalytic metal oxides when the catalytic metal oxide of (1) is manganese oxide and from about 1-20% by weight of the carbonate or hydroxide when the catalytic metal oxide of (1) is other than manganese oxide. Surfaces coated with the disclosed composition effect rapid decomposition and oxidation of cooking residues at temperatures of about 204.degree. C. (400.degree. F.) and lower.
REFERENCES:
patent: 3361531 (1968-01-01), Erb et al.
patent: 3460523 (1969-08-01), Stiles et al.
Dees Carl F.
E. I. Du Pont de Nemours and Company
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