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    A ferroelectric liquid crystal composition
    7.
    发明公开
    A ferroelectric liquid crystal composition 失效
    FerroelektrischeFlüssigkristallzusammensetzung。

    公开(公告)号：EP0427195A2

    公开(公告)日：1991-05-15

    申请号：EP90121204.3

    申请日：1990-11-06

    申请人： Chisso Corporation

    发明人： Terashima, Kanetsugu ,  Kikuchi, Makoto ,  Murashiro, Katsuyuki

    IPC分类号： C09K19/34 ,  C09K19/44 ,  C09K19/42

    CPC分类号： C09K19/46 ,  C09K19/3441 ,  C09K19/42 ,  C09K19/44

    摘要： A ferroelectric liquid crystal composition comprising achiral smectic liquid crystal compound(s) and optically active compounds and having high speed response properties and exhibiting Sc * phase within a broad temperature range including room temperature, and a light-switching element containing the above composition are provided, which composition comprises the following components A, B and C in 50-91%, 4-30% and 5-20%, each by weight, respectively:
    component A: at least one of compounds of the formula (A) having smectic C phase

    R¹ and R² each are same or different, linear or branched alkyl, alkoxy or alkanoyloxy each of 1-18C, X is H, halogen or CN, ℓ, m and n each one 1 or 2 and the sum of ℓ, m and n is 1 or 2,
    component B: at least one of optically active compounds of the formula (B):

    R³ is a linear or branched alkyl or alkoxy of 1-18C, R⁴ is a linear or branched alkyl of 2-18C or a linear or branched alkoxy of 1-18C, Y is H, halogen or CN, k is 0 or 1 and * is asymmetric C, the compounds having the same sense of spontaneous polarization (Ps) in chiral smectic C phase, induced when dissolved in smectic C liquid crystal; and
    component C: at least one of optically active compounds of the formula

    R⁵ is a linear or branched alkyl or alkoxy of 1-18C, R⁶ is a linear or branched alkyl of 2-18C or a linear or branched alkoxy of 1-18C, Z is H, halogen or CN and * is asymmetric C,
       the compounds having the same sense of Ps in chiral smectic C phase, induced when dissolved in smectic C liquid crystal, as that of compounds of component B.

    摘要翻译： 提供包含非手性近晶液晶化合物和光学活性化合物并具有高速响应性并在包括室温的宽温度范围内显示Sc *相的铁电液晶组合物和包含上述组成的光开关元件 ，该组合物分别包含50-91％，4-30％和5-20％的以下组分A，B和C：组分A：至少一种式（A）化合物具有近晶质 C相 R 1和R 2各自相同或不同，直链或支链烷基，烷氧基或烷酰氧基各自为1-18C，X为H，卤素或CN，l，m和n各1 组分B：式（B）的光学活性化合物中的至少一种：组分C：至少一种式（I）的光学活性化合物 C）：其中或 R 3，R 5为1-18℃的直链或支链烷基或烷氧基; R 4，R 6是2-18C的直链或支链烷基或1-18C的直链或支链烷氧基; Y，Z H，卤素或CN和*是不对称C，K是0或1

    Smectic liquid crystal mixture
    9.
    发明公开
    Smectic liquid crystal mixture 失效
    SmektischeFlüssigkristallmischung。

    公开(公告)号：EP0293763A2

    公开(公告)日：1988-12-07

    申请号：EP88108416.4

    申请日：1988-05-26

    申请人： CHISSO CORPORATION

    发明人： Terashima, Kanetsugu ,  Ichihashi, Mitsuyoshi ,  Takeshita, Fusayuki ,  Kikuchi, Makoto ,  Furukawa, Kenji

    IPC分类号： C09K19/34

    CPC分类号： C09K19/3458

    摘要： A smectic liquid crystal mixture having a broad smectic C phase temperature range including room temper­ature, a ferroelectric smectic liquid crystal mixture having a large spontaneous polarization, comprising the above smectic mixture and at least one optically active compound, and a liquid crystal display element having an improved response time, containing the above ferroelectric smectic liquid crystal mixture are provided, which smectic liquid crystal mixture comprises

    (1) at least two components at least one of which is a pyrimidine compound expressed by the formula
    wherein R¹ and R² each are a linear alkyl group having 1 -20 carbons;
    (2) at least one pyrimidine compound of the formula (I) and at least one pyrimidine compound expressed by the formula
    wherein R³ and R⁴ each are a linear alkyl group having 1 - 18 carbons; or
    (3) at least one pyrimidine compound of the formula (I) and at least one biphenylpyrimidine compound expressed by the formula
    wherein R⁵ and R⁶ each are a linear alkyl or alkoxy group each having 1 - 18 carbons.

    摘要翻译： 具有包括室温的广泛的近晶C相温度范围的具有大自发极化的铁电近晶体液晶混合物的近晶型液晶混合物，包括上述近晶混合物和至少一种光学活性化合物，以及液晶显示元件，其具有 提供了包含上述铁电近晶液晶混合物的响应时间的改善，其中的近晶液晶混合物包括（1）至少两种组分，其中至少一种是由式CHEM表示的嘧啶化合物，其中R 1和 R 2各自为具有1〜20个碳原子的直链烷基; （2）式（I）的至少一种嘧啶化合物和由式CHEM表示的至少一种嘧啶化合物，其中R 3和R 4各自为具有1至18个碳原子的直链烷基; 或（3）式（I）的至少一种嘧啶化合物和由式CHEM表示的至少一种联苯嘧啶化合物，其中R 5和R 6各自为直链烷基或烷氧基， 18个碳。 小号