Dioxane liquid crystal compounds

Details Dioxane liquid crystal compounds Dioxane liquid crystal compounds

1992-01-31

1992-12-15

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229964, 25229965, 25229966, 25229967, 25229901, 549375, C09K 1934, C09K 1912, C09K 1920, C09K 1952, C07D21901

Patent

active

051714710

ABSTRACT:
Novel ferroelectric and antiferroelectric liquid crystal compounds of the invention, which comprise those showing optically tristable states in phase S*.sub.(3), have a wide range of phase transition temperature so as to be not only preferably used solely as display element material but also mixed with any other liquid crystal to desiredly expand the above range wider and make optical response time faster.
Typical compounds are represented by ##STR1## in which Z means CF.sub.3, C.sub.2 F.sub.5, CHF.sub.2, CH.sub.2 F, CClF.sub.2, CCl.sub.2 F, CF.sub.3 CCl.sub.2 or C.sub.3 F.sub.7, m' and n' are same or different with each other and each is an integer of 1-20.

REFERENCES:
patent: 4753752 (1988-01-01), Raynes et al.
patent: 4894181 (1990-01-01), Praefcke et al.
patent: 4961876 (1990-10-01), Demus et al.
patent: 4973738 (1990-11-01), Suzuki et al.

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