Liquid crystal compounds

Details Liquid crystal compounds Liquid crystal compounds

1989-02-27

1993-03-16

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229901, 2522996, C09K 1912, C09K 1906, C09K 1952

Patent

active

051941791

ABSTRACT:
The invention lies particularly in novel compounds represented by the general formula; ##STR1## in which Z means CF.sub.3, CHF.sub.2, CH.sub.2 F, CClF.sub.2, CCl.sub.2 F, CHCLF, CCl.sub.3, C.sub.2 F.sub.2 or a perfluoroalkyl group of 3 or more carbon atoms, m and n are same or different with each other and represent an integral of 1-20, which are ferroelectric and chiral smetic liquid crystals of a large spontaneous polarization, a high speed of response and a good orientation, and showing a liquid crystal phase of tristable state and an electoclinic effect to be used as a liquid crystal element superior in an image display response.

REFERENCES:
patent: 4613209 (1986-09-01), Goodby et al.
patent: 4668427 (1987-05-01), Saito et al.
University of Tohoku, The 14th Liquid Crystal Forum Preprint, Sep. 27-29 (w/translation).
Chemistry Express, vol. 2, No. 1, pp. 53-56, Kinki Chemical Society, JP; K. Yoshino et al Fluorinated Ferroelectric Liquid Crystal and Its Dielectric Property.
Japanese Journal of Applied Phsyics/Pt. 2: Letters, vol. 26, No. 2, Feb. 1987, pp. L77-K78, Tokyo, JP; K. Yoshino et al: Novel Ferroelectricity in Fluorinated Ferroelectric Liquid Crystal.

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