Chiral liquid crystal compounds

Details Chiral liquid crystal compounds Chiral liquid crystal compounds

1993-09-22

1996-01-23

Harris, C.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229963, 25229966, C09K 1906, C09K 1912, C09K 1930, G02F 113

Patent

active

054863090

ABSTRACT:
Optically active compounds of formula (I), where X has a structure (II) and B is C.sub.1-12 alkyl, a chiral group or a group having a general structure (III), where R and R' are H, C.sub.1-12 alkyl, alkoxy, alkylcarbonyloxy, or alkoxycarbonyl, each ring (IV) and (V) is the same or different, A and D are single bonds or bridging groups, each a and d is 0 or 1; Z, Z' are CN, Cl, F, Br or CF.sub.3 ; provided when Z is CN or Cl, then when B is alkyl X-Y is not (VI) or (VII). Ferroelectric smectic liquid crystal mixtures containing these compounds are also described. ##STR1##

REFERENCES:
patent: 4576732 (1986-03-01), Isogai et al.
patent: 4852978 (1989-08-01), Davey et al.
patent: 5120467 (1992-06-01), Huynh-ba et al.
patent: 5133896 (1992-07-01), Coates et al.
patent: 5147577 (1992-09-01), Gray et al.
patent: 5230830 (1993-07-01), Coates et al.
patent: 5252252 (1993-10-01), Huynh-ba et al.

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