Anthraquinone dyestuffs, their preparation and use and dichroic

Details Anthraquinone dyestuffs, their preparation and use and dichroic Anthraquinone dyestuffs, their preparation and use and dichroic

1985-09-09

1987-08-25

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing pleochroic dye

260377, 260380, 260381, 260378, 350349, C09K 1910, C07C 9724, C09B 116, G02F 113

Patent

active

046891714

ABSTRACT:
Dyestuffs of the formula ##STR1## in which Y.sub.1, Y.sub.2, Y.sub.3, Y.sub.4 designate hydrogen, halogen, nitro, amino, alkylamino, arylamino, cycloalkylamino, aralkylamino, alkylthio, arylthio, cycloalkylthio, aralkylthio or hydroxyl, it being possible for the hydrocarbon radicals to be sustituted, with the proviso that

REFERENCES:
patent: 4299720 (1981-11-01), Osman et al.
patent: 4304683 (1981-12-01), Morinaka et al.
patent: 4360447 (1982-11-01), Morinaka et al.
patent: 4363743 (1982-12-01), Moeller et al.
patent: 4376715 (1983-03-01), Cognard et al.
patent: 4391489 (1983-07-01), Harrison et al.
patent: 4428858 (1984-01-01), Cognard et al.
patent: 4456545 (1984-06-01), Weber et al.
patent: 4505549 (1985-03-01), Shimidzu et al.
patent: 4585574 (1986-04-01), Blunck et al.

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