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US 4,046,943 AGranted
Malonic acid derivative composition for forming thermoparticulating coating
AssigneeWestinghouse Electric Corp.
InventorsJames D. B. Smith, David C. Phillips
Life of this patent
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Abstract
A composition is disclosed of a malonic acid derivative, a resinous carrier, and a solvent. The composition is applied to a portion of an electrical apparatus which is exposed to a gas stream. The solvent in the composition is evaporated to produce a thermoparticulating coating. When the electrical apparatus overheats the malonic acid derivative in the coating forms particles in the gas stream which are detected by a monitor.
Claims15
A composition comprising
- (1) at least one compound having the general formula ##STR2## which decomposes to produce detectable particles between about 60.degree. to about 200.degree. C., where R is selected from the group consisting of alkyl from C.sub.1 to C.sub.10, aryl, alkyl aryl from C.sub.1 to C.sub.10, cycloaliphatic, and heterocyclic, and R.sub.1 is selected from the group consisting of R and hydrogen;
- and
- (2) a solution of at least one resinous carrier curable and stable at 60.degree. C. and unreactive with said compound.
Dependencies are inferred from the claim text.