Compositions – Nonreactive analytical – testing – or indicating compositions
Patent
1986-04-22
1988-05-10
Terapane, John F.
Compositions
Nonreactive analytical, testing, or indicating compositions
252962, 116207, 116216, 116219, 374161, C09K 300, C09D 508
Patent
active
047433981
ABSTRACT:
A temperature indicating composition is provided for use on recoverable articles so that heating to produce recovery or to activate a heat-activatable sealant can be monitored. The composition comprises a thermochromic colorant in a binder and an activator that causes the thermochromic colorant to change color at a temperature lower than the temperature at which the colorant would change temperature in the absence of the activator. The thermochromic colorant can be folic acid and the activator can be an acid that has a pK of less than 4.2.
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Day, Jesse H., Chem. Reviews, 68:6, pp. 649-657, Nov., 1968.
Day, Jesse H., Chem. Reviews, pp. 65-80, 1963.
Brown Andrew V.
Moyer Wendell W.
Burkard Herbert G.
Kilby Catherine S.
Raychem Corporation
Rice Edith A.
Terapane John F.
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