C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
31/105, 260/251
C07D 239/26 (2006.01) C07D 239/34 (2006.01) C09K 19/34 (2006.01)
Patent
CA 1324791
Abstract of the disclosure 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 Image form a smectic C phase besides a relatively broad nematic phase when R1 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 R2 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.
577609
Dubal Hans-Rolf
Escher Claus
Hemmerling Wolfgang
Muller Ingrid
Ohlendorf Dieter
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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