G - Physics – 01 – K
Patent
G - Physics
01
K
G01K 11/06 (2006.01)
Patent
CA 2236032
A critical temperature indicating device is provided. It includes a microporous membrane, an indicating composition containing less than about 10 wt.% water, and means for containing the microporous membrane and the indicating composition. The indicating composition includes: a primary organic component comprising at least one compound that has a freezing point above the critical temperature and does not spontaneously wet out the microporous membrane at a temperature at least about 30 ~C above the critical temperature; a modifying component comprising at least one compound that has a freezing point below the critical temperature; and a wetting component comprising at least one compound that has a freezing point below the critical temperature and is capable of spontaneously wetting out the microporous membrane at about the critical temperature.
L'invention concerne un dispositif indiquant une température critique, constitué d'une membrane microporeuse, d'une composition indicatrice contenant moins de 10 % en poids environ d'eau, et d'un système pour enfermer la membrane et la composition. Cette dernière comprend: un composant organique primaire contenant au moins un composé ayant un point de congélation supérieur à la température critique et ne mouillant pas spontanément la membrane à une température supérieure d'au moins 30 ·C à la température critique; un agent modificateur contenant au moins un composé ayant un point de congélation inférieur à la température critique; et un composant mouillant comprenant au moins un composé ayant un point de congélation inférieur à la température critique et capable de mouiller spontanément la membrane microporeuse aux environs de la température critique.
Birkholz Russell D.
Pereyra Rodger J.
Scholz Matthew T.
Minnesota Mining And Manufacturing Company
Smart & Biggar
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