Diazonium salt composition for forming thermoparticulating coating
AssigneeWestinghouse Electric Corp.
InventorsJames D. B. Smith, David C. Phillips
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Abstract
A composition is disclosed of a diazonium salt, 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 diazonium salt in the coating forms particles in the gas stream which are detected by a monitor.
Claims21
A composition comprising about 20 to about 250 phr of at least one diazonium salt solid and stable at 50.degree.C and a solution of a resinous carrier curable and stable at 60.degree.C and unreactive with said diazonium salt, where the amount of solvent in said solution is about 25 to about 75% (by weight based on said resinous carrier).
A thermoparticulating coating comprising a solid layer of resinous carrier containing about 20 to about 250 phr of an unreacted diazonium salt which is solid and stable at 50.degree.C.
Dependencies are inferred from the claim text.