Compositions for controllably releasing alcohols or amines

Details Compositions for controllably releasing alcohols or amines Compositions for controllably releasing alcohols or amines

1985-07-22

1989-01-03

Castel, Benoit

Chemistry: analytical and immunological testing

Miscellaneous

1061631, 106169, 106186, 252184, 424 65, 424 761, 424 84, 426 3, 426 6, 426534, 426537, 436166, 536 30, 536 31, 536 32, A01N 2510, A61K 732, C09K 300, G01N 3300

Patent

active

047957140

ABSTRACT:
An adjustable accumulated thermal exposure indicator device, and method of use, for affixing to and indicating deterioration of perishable goods and the like, comprising (1) a reactant yielding material that reacts via one or more steps at a rate depending on time, temperature, and pH to provide an amine and (2) an indicator that reacts at a time, temperature, concentration and pH dependent rate with the amine to produce a visible reaction that is indicative of the expiration of a predetermined time-temperature history related to the useful life of the goods to which the device is affixed. Also provided is a device or article that is responsive to accumulated thermal exposure for the controlled release of immobilized alcohols and amines.

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