Process for monitoring time-temperature histories of perishables

Details Process for monitoring time-temperature histories of perishables Process for monitoring time-temperature histories of perishables

1979-07-26

1981-06-30

Padgett, Benjamin R.

Compositions

Nonreactive analytical, testing, or indicating compositions

252600, 73356, 116202, 116207, 250474, 426 88, 20415919, C09K 300

Patent

active

042761905

ABSTRACT:
An improved process and device are described, for monitoring time-temperature histories of perishable articles, utilizing an inactive form of a diacetylene compound, incapable of undergoing a color change upon thermal annealing, but capable of conversion to an active form upon contacting an activating vapor. The active form is capable of undergoing a color change upon thermal annealing, as a result of solid state polymerization wherein the resulting color change is representative of the time-temperature history of thermal annealing. Specific active and inactive forms of diacetylenes useful in the improved process and device are also described.

REFERENCES:
patent: 3501297 (1970-03-01), Cremeans
patent: 3723121 (1973-03-01), Hauser
patent: 3981683 (1976-09-01), Larssen
patent: 3999946 (1976-12-01), Patel
patent: 4042336 (1977-08-01), Larssen
patent: 4189399 (1980-02-01), Patel

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