Ferroelectric liquid crystals containing pyrimidine and chiral c

Details Ferroelectric liquid crystals containing pyrimidine and chiral c Ferroelectric liquid crystals containing pyrimidine and chiral c

1994-03-22

1994-11-22

Lovering, Richard D.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

544298, 568631, 568647, 25229901, C09K 1934, C09K 1952, C07C 4100, C07D23902

Patent

active

053666593

ABSTRACT:
A liquid crystal composition containing an optically active or a ferroelectric liquid crystal compound represented by the following formula: ##STR1## wherein A can be either --CH.sub.2 -- or --CO--; R can be either an alkyl or alkoxyl group having 1 to 22 carbons: R' is an alkyl group having 2 to 8 carbons; x and y are integers of either 0 or 1, provided that when x=0, y.noteq.1; D can be a hydrogen or a halogen atom; and * represents a chiral center. The ferroelectric liquid crystals of the present invention exhibit optical and chemical stabilities, high-speed responsive, and high spontaneous polarization, and thus are excellent materials for use in making liquid crystal devices and liquid crystal light switching elements.

REFERENCES:
patent: 4900472 (1990-02-01), Miyazawa et al.
patent: 4980083 (1990-12-01), Shibata et al.
patent: 5013475 (1991-05-01), Shibata et al.
patent: 5043094 (1991-08-01), Takano et al.
patent: 5080827 (1992-01-01), Miyazawa et al.
patent: 5152919 (1992-10-01), Kitamura et al.
patent: 5236618 (1993-08-01), Heppke et al.

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