Thermometric compositions for recording changes in temperature comprising a cholesteric liquid crystal system together with a chemically inert substance which is miscible with the crystal system. By varying the amount of the second component in the composition, the clearing point of the composition, that is the temperature at which there is a phase change to the isotropic phase, can be varied in a predictable manner.
申请公布号
DE2431667(A1)
申请公布日期
1975.01.23
申请号
DE19742431667
申请日期
1974.07.02
申请人
ASHLEY-BUTLER, INC., NEW YORK, N.Y. (V.ST.A.)
发明人
SHARPLESS, EDWARD NEIL, SOMERVILLE, N.J. (V.ST.A.)