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    • 3. 发明授权
    • Liquid crystal compositions
    • 液晶组成
    • US4390467A
    • 1983-06-28
    • US351433
    • 1982-02-23
    • Yutaka Mizukuchi
    • Yutaka Mizukuchi
    • C09K19/46G04B39/02C09K3/34
    • C09K19/46G04B39/025
    • A liquid crystal composition comprises at least two compounds selected from the group consisting of trans-4-alkylcyclohexane-1-carboxylic acid-4'-(4"-alkylphenyl)-2'-chlorophenyl ester having the general formula: ##STR1## wherein R and R' are normal chain alkyl groups containing 2 to 7 carbon atoms, these compounds making up 30 mole % or more of the total composition, and at least one compound selected from at least one of the group consisting of 4-alkylbenzoic acid-4'-(4"-alkylphenyl)-2'-chlorophenyl ester having the general formula: ##STR2## wherein R and R' are normal chain alkyl groups containing 2 to 8 carbon atoms and the group consisting of 4-alkoxybonzoic acid-4'-(4"-alkylphenyl)-2'-chlorophenyl ester having the general formula: ##STR3## wherein R and R' are normal chain alkyl groups containing 2 to 8 carbon atoms. This composition not only have a wide nematic temperature range assuring operation at a low temperature of less than -20.degree. C. but also have a low viscosity and excellent response.
    • 液晶组合物包含至少两种选自具有以下通式的反式-4-烷基环己烷-1-羧酸-4' - (4“ - 烷基苯基)-2'-氯苯基酯的化合物:< IMAGE> 其中R和R'是含有2至7个碳原子的正链烷基,这些化合物占总组合物的30摩尔%或更多,以及至少一种选自4-烷基苯甲酸 -4' - (4“ - 烷基苯基)-2'-氯苯基酯,其通式为:其中R和R'为含有2-8个碳原子的正链烷基,由4-烷氧基羰基 -4' - (4“ - 烷基苯基)-2'-氯苯基酯,其具有通式:其中R和R'是含有2至8个碳原子的正链烷基。 该组合物不仅具有宽的向列温度范围,而且在低于-20℃的低温下保证操作,同时也具有低粘度和良好的响应性。