Liquid-crystalline 4-alkylcyclohexyl esters
    1.
    发明授权
    Liquid-crystalline 4-alkylcyclohexyl esters 失效
    液晶4-烷基环己基酯

    公开(公告)号:US4341653A

    公开(公告)日:1982-07-27

    申请号:US238209

    申请日:1981-02-26

    CPC分类号: C09K19/3068 C09K19/42

    摘要: Novel liquid crystal compounds having broader and preferable liquid crystal temperature ranges are provided. Their optically active isomers form a cholesteric liquid crystal, while their racemates form a nematic liquid crystal.The compounds are trans-4"-alkylcyclohexyl esters of 4'-(2-methyl-butyl)-4-biphenylcarboxylic acid expressed by the general formula ##STR1## wherein R represents a straight chain alkyl group having 1 to 10 carbon atoms, and the symbol * represents an asymmetric carbon atom.

    摘要翻译: 提供了具有更宽且优选的液晶温度范围的新型液晶化合物。 它们的旋光异构体形成胆甾醇型液晶,而它们的外消旋体形成向列型液晶。 化合物是由通式(I)表示的4' - (2-甲基 - 丁基)-4-联苯基羧酸的反式-4'-烷基环己基酯,其中R表示具有1至10个直链烷基 碳原子,符号*表示不对称碳原子。

    Liquid crystalline compounds and mixtures thereof
    5.
    发明授权
    Liquid crystalline compounds and mixtures thereof 失效
    液晶化合物及其混合物

    公开(公告)号:US4596667A

    公开(公告)日:1986-06-24

    申请号:US568060

    申请日:1984-01-04

    CPC分类号: C09K19/2021 C09K19/3068

    摘要: Novel ferroelectric liquid crystalline compounds having a superior stability and chiral, smectic liquid crystalline compositions containing at least one kind of the same are provided, which compounds are expressed by the general formula ##STR1## wherein ##STR2## represents 1,4-phenylene group ##STR3## or 1,4-trans-cyclohexane group ##STR4## R*, an optically active alkyl group; m=o, 1 or 2; n=1 or 2; X, a linear chain or branched alkyl group or alkoxy group, each having 1 to 18 carbon atoms; and when ##STR5## represents ##STR6## m=1; and n=1, X represents a linear chain or branched alkyl group having 1 to 18 carbon atoms or a linear chain alkoxy group having 11 to 18 carbon atoms.

    摘要翻译: 提供了具有优异稳定性的新型铁电液晶化合物和含有至少一种类型的手性的近晶液晶组合物,该化合物由通式(I)表示,其中 亚苯基基团或1,4-反式环己基基团,即光学活性烷基; m = o,1或2; n = 1或2; X,各自具有1至18个碳原子的直链或支链烷基或烷氧基; 当表示 m = 1时; n = 1,X表示碳原子数为1〜18的直链状或支链状的烷基或碳原子数为11〜18的直链状的烷氧基。