发明名称 |
Photoactivatable time-temperature indicator |
摘要 |
A photoactivated time-temperature indicator is based on diacetylenic salts. A thermally unreactive ("inactive") diacetylenic salt (or a mixture of such salts) is mixed, in a polymeric matrix, with a material that generates acid upon exposure to light. Photoexcitation, preferably by UV or near UV light, causes the formation of a thermal reactive ("active") free diacetylenic acid. Following this activation step, a progressive color development occurs at a rate that increases with temperature. The indicator is useful for monitoring the freshness of perishable products, particularly those that require refrigeration.
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申请公布号 |
US4737463(A) |
申请公布日期 |
1988.04.12 |
申请号 |
US19850786407 |
申请日期 |
1985.10.09 |
申请人 |
LIFELINES TECHNOLOGY, INC. |
发明人 |
BHATTACHARJEE, HIMANGSHU R.;YARDLEY, JAMES T.;PRUSIK, THADDEUS;CHANCE, RONALD R. |
分类号 |
G01N31/22;(IPC1-7):G01N33/02;G01D21/00 |
主分类号 |
G01N31/22 |
代理机构 |
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