Thioether compound and liquid crystal composition

Details Thioether compound and liquid crystal composition Thioether compound and liquid crystal composition

1988-06-14

1990-07-24

Terapane, John F.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229965, 25229967, 560 18, 544298, 544335, 546301, 546342, 350350S, 558404, 558416, C09K 1934, C09K 1912

Patent

active

049433857

ABSTRACT:
A liquid crystalline compound useful as a component of liquid crystal compositions for liquid crystal display elements, exhibiting ferroelectric liquid crystal phases over a broad temperature range including room temperature, and a liquid crystal composition containing the same are provided. The compound is a thioether compound of the formula ##STR1## wherein R.sup.1 is a 2-10C alkyl; R.sup.2 is methyl or ethyl; but the carbon number of R.sup.1 is always larger than that of R.sup.2 ; A is ##STR2## wherein X is H, halogen or CN; Y is a 1-18C alkyl or alkoxy; l is 1 or 2; and * indicates optically active carbon atom.

REFERENCES:
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patent: 4689176 (1987-08-01), Inoue et al.
patent: 4780242 (1988-10-01), Miyazawa et al.
patent: 4826621 (1989-05-01), Terashima et al.
patent: 4826979 (1989-05-01), Kano
patent: 4834907 (1989-05-01), Inoue et al.
patent: 4874545 (1989-10-01), Heppke et al.
patent: 4876028 (1989-10-01), Hemmerling et al.
Demus et al. (ed.), Flussige Kristalle in Tabellen II, p. 387 (1984).
Gray et al. (ed.), Liquid Crystals & Plastic Crystals, vol. 1, pp. 142-143 (1974).

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