Device for measuring temperature using co-crystallized acetylenic compositions
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United States of America Patent
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Nov 25, 1980
Issued Date -
N/A
app pub date -
Nov 13, 1978
filing date -
Nov 13, 1978
priority date (Note) -
Expired
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Abstract
A composition is described comprising at least two co-crystallized acetylenic compounds, of different chemical structures, each containing at least one --C.tbd.C--C.tbd.C-- group and substituents selected from the group consisting of sulfonate, urethane and alcohol radicals, at least one of the compounds capable of undergoing a contrasting color change upon exposure to actinic radiation or thermal annealing, wherein the composition exhibits a substantially different thermogram than the sum of thermograms of the individual components as obtained by differential scanning calorimetry. A device is also described useful for measuring the time-temperature or radiation-dosage history of an article comprising a substrate having deposited thereon the described composition. A process is also described for producing the composition of this invention.
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