Liquid crystal compounds having naphthalene nucleus

Details Liquid crystal compounds having naphthalene nucleus Liquid crystal compounds having naphthalene nucleus

1989-04-28

1990-11-27

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

560 53, 560 85, 560 86, 252299600, C07C 6976

Patent

active

049737384

ABSTRACT:
Novel ferroelectric liquid crystal compounds which may realize a stable molecular orientation which makes it possible to give a definite light-dark contrast in the no electric field state and attain a definite threshold property as well as hysteresis, and for making it possible to attain the dynamic driving as well as the high speed of response, owing to tri-stable phase thereof, of the general formulae (I) and (II) ##STR1## in which R.sub.1 means an alkyl, alkoxy or alkyloxycarbonyl each of 1-20 carbon atoms, R.sub.2 means optically active ##STR2## wherein n is an integer of 4-10, X means ##STR3## Y means ##STR4##

REFERENCES:
patent: 4645305 (1987-02-01), Yokokura et al.
patent: 4728458 (1988-03-01), Higuchi et al.
patent: 4737313 (1988-04-01), Saito et al.
patent: 4764619 (1988-08-01), Gunjima et al.
patent: 4826620 (1989-05-01), Heppke et al.

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