Liquid crystal compounds and indicating device employing same

Details Liquid crystal compounds and indicating device employing same Liquid crystal compounds and indicating device employing same

1987-11-17

1991-05-07

Lovering, Richard D.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229901, 25229962, 25229963, 25229964, 25229965, 25229966, 350350S, 560 64, 560 65, 560 73, C09K 1934, C09K 1932, C09K 1912, G02F 113

Patent

active

050134760

ABSTRACT:
A ferroelectric liquid crystal mixture containing at least one compound of the formula ##STR1## wherein n stands for the number 0 or 1; X.sup.1 represents a single covalent bond, --COO-- or --OOC-- and X.sup.2 represents a single covalent bond, --COO--, --OOC--, --CH.sub.2 CH.sub.2 --, --OCH.sub.2 -- or --CH.sub.2 O--; rings A.sup.1, A.sup.2 and A.sup.3 each independently signify 1,4-phenylene optionally substituted with cyano, halogen or lower alkyl or pyrimidin-2,5-diyl, pyrazin-2,5-diyl, when n is 1, trans-1,4-cyclohexylene or trans-m-dioxan-2,5-diyl; with the proviso that one of the rings present stands for pyrimidin-2,5-diyl or pyrazin-2,5-diyl when a further ring signifies trans-1,4-cyclohexylene or when n stands for the number 0 and X.sup.1 stands for a single covalent bond; and R.sup.1 signifies an optionally halogen-substituted alkenyl group with up to 18 carbon atoms in which optionally 1 or 2 non-adjacent CH.sub.2 groups are replaced by --O-- and/or a C.dbd.C double bond; with the proviso that R.sup.1 is different from 3,7-dimethyl-6-octenyloxy; R.sup.2 signifies an optionally halogen-substituted alkyl group with up to 18 carbon atoms in which optionally 1 or 2 non-adjacent CH.sub.2 groups are replaced by --O-- and/or a C.dbd.C double bond; with the proviso that residues R.sup.1 and/or R.sup.2 attached to an aromatic ring have at least 2 chain atoms between the aromatic ring and a C.dbd.C double bond present;
as well as novel compounds falling under formula I and novel ferroelectric liquid crystal devices employing the compounds according to the invention.

REFERENCES:
patent: 4200580 (1980-04-01), Hsu
patent: 4311610 (1982-01-01), Zaschke et al.
patent: 4325830 (1982-04-01), Sethofer
patent: 4356104 (1982-10-01), Hsu
patent: 4462923 (1984-07-01), Boller et al.
patent: 4565425 (1986-01-01), Petrzilka et al.
patent: 4621901 (1986-11-01), Petrzilka et al.
patent: 4654421 (1987-03-01), Tanaka et al.
patent: 4676604 (1987-06-01), Petrzilka et al.
patent: 4704227 (1987-11-01), Krause et al.
patent: 4719032 (1988-01-01), Wachtler et al.
patent: 4725688 (1988-02-01), Taguchi et al.
patent: 4726911 (1988-02-01), Krause et al.
patent: 4770503 (1988-09-01), Buchecker et al.
patent: 4775223 (1988-10-01), Yoshinaga et al.
patent: 4776973 (1988-10-01), Bofinger et al.
patent: 4784793 (1988-11-01), Coates et al.
patent: 4812259 (1989-03-01), Yoshinaga et al.
Haramoto et al., "New Ferroelectric Liquid Crystals", Chem. Let. pp. 755-758 (1987).

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