Compositions – Liquid crystal compositions – Containing nonsteryl liquid crystalline compound of...
Patent
1988-09-16
1990-01-02
Gron, Teddy S.
Compositions
Liquid crystal compositions
Containing nonsteryl liquid crystalline compound of...
25229901, 350350R, 350350S, 544248, 544335, G02F 113, C09K 1934, C07D23926, G09F 935
Patent
active
048911518
ABSTRACT:
Liquid-crystalline phenylpyrimidinyl cyclohexanecarboxylates having a smectic phase, a process for their preparation, and their use in liquid-crystal mixtures The phenylpyrimidinyl trans-cyclohexanecarboxylates of the general formula ##STR1## form a smectic C phase besides a relatively broad nematic phase when R.sup.1 denotes an alkyl radical having 10 to 16 carbon atoms, in particular 11 to 16 carbon atoms, or an alkoxy radical having 8 to 14 carbon atoms, and R.sup.2 denotes an alkyl radical having 2 to 9 carbon atoms. They are therefore particularly suitable as components of liquid-crystalline mixtures having a smectic C phase since they induce a relatively broad nematic phase or extend a narrow nematic phase which is present and extend the temperature range of the smectic C phase to low temperatures, but in particular to high temperatures.
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Kelly, S. M. et al., Liq. Cryst., vol. 3(9), pp. 1173-1182 (Sep. 1988).
Dubal Hans-Rolf
Escher Claus
Hemmerling Wolfgang
Muller Ingrid
Ohlendorf Dieter
Gron Teddy S.
Hoechst Aktiengesellschaft
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