Ferroelectric liquid crystal composition

Details Ferroelectric liquid crystal composition Ferroelectric liquid crystal composition

1989-01-19

1989-11-21

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229901, 350350S, C09K 1934, G02F 113

Patent

active

048820865

ABSTRACT:
A ferroelectric liquid crystal composition exhibiting SC* phase within a broad temperature range including room temperature and yet having cholesteric phase and further high-speed response properties and a light switching element using the above composition and having high-speed response properties are provided, which composition comprises an achiral compound expressed by the formula ##STR1## wherein R.sup.1 and R.sup.2 each represent the same or different linear or branched chain alkyl group of 1 to 18 carbon atoms, in 20 to 70% by weight and having cholesteric phase; and which composition may further comprise at least one member of optically active compounds selected from four specified pyrimidine compounds.

REFERENCES:
patent: 4780241 (1988-10-01), Furukawa et al.
patent: 4826621 (1989-05-01), Terashima et al.
Demus, et al., Flussige Kristalle im Tabellen II, Veb Deutscher Verlag fur Grundstoffindustrie, Leipzig, pp. 375-379, (1984).

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