Liquid crystal composition

Details Liquid crystal composition Liquid crystal composition

1993-12-27

1995-08-08

Harris, Cynthia

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229962, 25229966, 359103, C09K 1930, C09K 1932, C09K 1912, G02F 113

Patent

active

054396131

ABSTRACT:
A liquid crystal composition which is a liquid crystal mixture of an achiral liquid crystal compound of the following formula (IV) with a chiral compound having an adsorptivity to adsorbents, not greater than that of the achiral compound: ##STR1## wherein six-membered rings A', B', C' and D' each independently are trans-1,4-cyclohexylene, 1-cyclohexene-1,4-diyl or 1,4-phenylene; g, h and i each are 0 or 1; (g+h+i).gtoreq.1; X', Y' and Z' each independently are a single bond, --CH.sub.2 --CH.sub.2 --, --CH.dbd.CH-- or --C.tbd.C--; R.sup.7 is C.sub.n H.sub.2n+1 --, C.sub.n H.sub.2n-1 or C.sub.n H.sub.2n+1 OC.sub.k H.sub.2k --; R.sup.8 is C.sub.m H.sub.2m+1 --, C.sub.m H.sub.2m+1 O--, F, CHF.sub.2 O or CF.sub.3 O--; n and m each independently are an integer of 1 to 18; k is an integer of 1 to 17; (n+k) is 2 to 18; at least one of X', Y' and Z' is single bond; when ring D' is 1,4-phenylene and R.sup.8 is F, CHF.sub.2 O-- or CF.sub.3 O--, then H at ortho position as regards R.sup.8 may be replaced by F; and when g is 1 and ring B' or C' is 1,4-phenylene, then H at the lateral position of the ring may be replaced by F.

REFERENCES:
patent: 4316041 (1992-02-01), Totten et al.
patent: 4547309 (1985-10-01), Mochizuki et al.
patent: 4614619 (1986-09-01), Shannon
patent: 4637896 (1987-01-01), Shannon
patent: 4952335 (1990-08-01), Furukawa et al.
patent: 5089169 (1992-02-01), Mochizuki et al.
patent: 5114614 (1992-05-01), Emoto et al.
patent: 5198151 (1993-03-01), Kuratate et al.

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