Disclosed are compounds of the formula: ##STR1## wherein R.sub.1 is an alkyl group and R.sub.2 is an alkyl, alkoxy, acyloxy, alkyl carbonato group having 1 to 10 carbon atoms, CN or NO.sub.2. The compounds of the invention are useful as liquid crystal materials in electrooptical displays. Also disclosed are novel admixtures of the above benzoate compounds with cyanophenyl dioxane compounds, these admixtures being especially useful for multiplexed electrooptical displays. Preferred admixtures include at least about 40 weight percent of the above benzoate compounds and at least about 40 weight percent of cyanophenyl dioxane compounds with other liquid crystalline compounds such as phenyl cyclohexanecarboxylate, biphenyl and/or phenyl benzoate liquid crystalline compounds also being present in amounts up to about 20 weight percent.
本发明涉及以下式的化合物:##STR1##其中R.sub.1是烷基,R.sub.2是含有1至10个碳原子的烷基,烷氧基,酰氧基,烷基
碳酸酯基,CN或NO.sub.2。本发明的化合物可用作电光显示器中的液晶材料。本发明还公开了上述
苯甲酸酯化合物与
氰基苯二氧化合物的新型混合物,这些混合物在多路复用电光显示器中特别有用。首选混合物包括至少约40重量%的上述
苯甲酸酯化合物和至少约40重量%的
氰基苯二氧化合物,还可以存在其他液晶化合物,例如苯基
环己烷羧酸酯,
联苯和/或
苯甲酸酯液晶化合物,其量高达约20重量%。