Liquid crystalline dielectric, new dichroitic naphthoquinone dye

Details Liquid crystalline dielectric, new dichroitic naphthoquinone dye Liquid crystalline dielectric, new dichroitic naphthoquinone dye

1982-07-02

1984-09-18

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing pleochroic dye

260396R, 260396N, 350349, C09K 334, G02F 113, C07C 9718, C09B 5700

Patent

active

044722923

ABSTRACT:
A liquid crystalline dielectric useful in electro-optical display elements based on the guest-host effect, comprises a liquid crystalline compound and a pleochroitic dyestuff of the formula ##STR1## wherein X and Y are the same or different and each is hydrogen, chlorine or bromine; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each independently is hydrogen, alkyl or alkoxyalkyl each of up to 8 C-atoms or a cyclic group Z, wherein Z is, ##STR2## and R is alkyl, alkoxy, alkoxyalkyl, alkoxyalkoxy or alkanoyloxy each of up to 8 C-atoms, with the proviso that at least one and at most two of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is cyclic group Z; and when two Z groups are present, either R.sub.1 and R.sub.2 or R.sub.3 and R.sub.4 are both a cyclic group Z; and, when R.sub.3 and R.sub.4 are both cyclic groups Z, these are in the 2- and 6- or 3- and 7-positions of the naphthalene structure.

REFERENCES:
patent: 2553049 (1951-05-01), Kartaschoff et al.
patent: 2555973 (1951-06-01), Kartaschoff et al.
patent: 2623872 (1952-12-01), Kartaschoff et al.
patent: 3338659 (1967-08-01), Bosshard et al.
patent: 3422111 (1969-01-01), Bosshard et al.
patent: 3539597 (1970-11-01), Bosshard et al.
patent: 3649654 (1972-03-01), Keller et al.
patent: 4304683 (1981-12-01), Morinaka et al.
patent: 4358392 (1982-11-01), Gognard et al.
patent: 4363743 (1982-12-01), Moeller et al.
patent: 4376715 (1983-03-01), Gognard et al.
Blackburn, C. et al., Mol. Cryst. Liq. Cryst., vol. 101, pp. 341-349 (1983).

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