Cholesteric liquid crystal of the reentrant type and a temperatu

Thermal measuring and testing – Temperature measurement – Nonelectrical – nonmagnetic – or nonmechanical temperature...

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116216, 116217, 25229901, 25229964, 25229965, 2522997, 374160, 374161, C09K 334, G01K 1112

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active

044102836

ABSTRACT:
Cholesteric liquid crystals of the so-called reentrant mesogenic type obtained by mixing a substance such as a cholesterol ester having molecules of the "chiral" type with a liquid crystal of the so-called reentrant nematic type such as a substance corresponding to the general formula: ##STR1## where R is an alkyl or alkoxy or alkylcarbonate group with:

REFERENCES:
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patent: 4149413 (1979-04-01), Gray et al.
patent: 4167489 (1979-09-01), Osman
patent: 4227778 (1980-10-01), Raynes
Weissflog, W. et al., Mol. Cryst. Liq. Cryst., vol. 56 (Letters), pp. 295-301 (1980).
Hardquin, F. et al., Mol. Cryst. Liq. Cryst., vol. 56 (Letters), pp. 35-41 (1979).
Tinh, N. et al., Mol. Cryst. Liq. Cryst., vol. 56 (Letters), pp. 257-262 (1980).
Tinh, N. et al., Mol. Cryst. Liq. Cryst., vol. 56 (Letters), pp. 323-330 (1980).
Tinh, N. et al., Mol. Cryst. Liq. Cryst., vol. 72 (Letters), pp. 195-199 (1982).

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