| 摘要 |
A composition for nematic liquid crystal color display elements, said composition comprising at least one anthraquinonic dye represented by the following formula <IMAGE> (I) wherein X and Y are identical or different and represent -NH2 or -OH; Z represents halogen, -OR, -NHR, <IMAGE> <IMAGE> -CONHR2 or -COOR2, in which R represents an alkyl group having 1 to 15 carbon atoms or a lower alkyl group optionally substituted by -OH, <IMAGE> R1 represents hydrogen, halogen, -OH, -OCH3, an alkyl group having 1 to 15 carbon atoms, or a methoxy group optionally substituted by <IMAGE> and R2 is a phenyl group, an alkyl group having 2 to 5 carbon atoms or a cyclohexyl group; and n is an integer of 1 or 2 provided that when X is -NH2 and Y is -OH, and when X and Y are both -OH, n is an integer of 1, and when n represents an integer of 2, the two Z's may be identical or different dissolved in at least one nematic liquid crystal.
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