C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
150/26, 402/321,
C08K 5/42 (2006.01) C07C 309/73 (2006.01) C08F 138/00 (2006.01) G01N 31/22 (2006.01) G01N 33/02 (2006.01) G01N 33/44 (2006.01)
Patent
CA 1142181
ABSTRACT New fluorinated benzenesulfonate diacetylene com- positions are described which are useful in time-temperature devices for monitoring the shelf-lives of perishable arti- cles. The compositions are solid-state polymerizable by thermal annealing or exposure to actinic or high energy ionizing radiation. Some of the compositions, in addition, exhibit relatively longer polymerization induction periods, compared to other known diacetylene compositions, and an "autocatalytic" effect upon polymerization during which a rapid color change occurs. These characteristics are extremely useful in monitoring situation which require a striking color change as an indication that a particular time-temperature history profile, e.g. shelf-life, has expired.
335518
Allied Corporation
Gowling Lafleur Henderson Llp
LandOfFree
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