Fluoroalkoxydiphenyl pyrimidine, liquid crystal composition and
electro-optic element
    21.
    发明授权
    Fluoroalkoxydiphenyl pyrimidine, liquid crystal composition and electro-optic element 失效
    氟烷氧基二苯基嘧啶,液晶组合物和电光元件

    公开(公告)号:US4963288A

    公开(公告)日:1990-10-16

    申请号:US326033

    申请日:1989-03-20

    CPC分类号: C07D239/26 C09K19/3463

    摘要: New fluoroalkoxydiphenyl pyrimidines which are organic compounds having optically active groups, liquid crystal compositions containing the said compounds and electro-optic elements using the said compositions are provided.The compounds have the following general formula: ##STR1## wherein R.sup.1 is an alkyl or alkoxy group having 1-20 carbon atoms, a halogen atom or a cyano group, R.sup.2 is a straight-chain or branched chain alkyl group having 1-15 carbon atoms, --A-- is a group of ##STR2## X and Y independently indicate a hydrogen atom, a halogen atom or a cyano group, and * indicates that its carbon atom is an asymmetric carbon atom.

    摘要翻译: 提供了具有光学活性基团的新的氟烷氧基二苯基嘧啶,含有所述化合物的液晶组合物和使用所述组合物的电光元件。 该化合物具有以下通式:其中R1是具有1-20个碳原子的烷基或烷氧基,卤原子或氰基,R2是具有1个碳原子的直链或支链烷基 -15个碳原子,-A-是一组X,Y和Y独立地表示氢原子,卤素原子或氰基,*表示其碳原子是不对称碳原子。

    .alpha.-substituted-propionic acid esters
    22.
    发明授权
    .alpha.-substituted-propionic acid esters 失效
    (ALPHA) - 营养型 - 酸性酯

    公开(公告)号:US5055222A

    公开(公告)日:1991-10-08

    申请号:US408950

    申请日:1989-09-18

    IPC分类号: C09K19/12 C09K19/34

    摘要: An optically active compound exhibiting high speed response properties when used as a component of liquid crystal materials used in a liquid crystal display mode utilizing ferroelectricity, and a liquid crystal composition containing the compound are provided, which compound is expressed by the formula ##STR1## wherein R.sup.1 represents alkyl, alkoxy or alkoxycarbonyl each of 2 to 18 C, R.sup.2 represents alkyl of 3 to 18 C or alkoxy of 1 to 18 C and A represents a member selected from a group of two directly bonded six-membered rings having a halogen atom, cyano group, methyl group or trifluoromethyl group attached thereonto and * represents an unsymmetric carbon atom.

    摘要翻译: 当用作利用铁电的液晶显示模式中使用的液晶材料的组分和含有该化合物的液晶组合物时,提供了具有高速响应特性的光学活性化合物,该化合物由下式表示:其中 R1表示2〜18个碳原子的烷基,烷氧基或烷氧基羰基,R2表示3〜18个碳原子的烷基或1〜18个C的烷氧基,A表示选自具有卤素原子的两个直接键合的六元环 ,氰基,甲基或三氟甲基,*表示不对称的碳原子。

    Halogen-substituted phenyl benzyl ether derivatives
    28.
    发明授权
    Halogen-substituted phenyl benzyl ether derivatives 失效
    卤素取代苯基苄基醚衍生物

    公开(公告)号:US4784791A

    公开(公告)日:1988-11-15

    申请号:US68332

    申请日:1987-07-01

    CPC分类号: C09K19/20

    摘要: A novel liquid crystal compound represented by the general formula (I): ##STR1## (wherein R is a straight or branched alkyl or alkoxy group having 1 to 20 carbon atoms, R* is an optically active alkyl group having 4 to 20 carbon atoms, X is a fluorine atom or a chlorine atom, and n is 1 or 2), a liquid crystal composition containing at least one liquid crystal compound of the general formula (I), a chiral smectic liquid crystal composition containing at least one liquid crystal compound of the general formula (I), and an optical switching element utilizing the chiral smectic liquid crystal composition containing at least one liquid crystal compound of the general formula (I) are described.

    摘要翻译: 由通式(I)表示的新型液晶化合物:其中,R为碳原子数1〜20的直链或支链烷基或烷氧基,R *为4〜 20个碳原子,X为氟原子或氯原子,n为1或2),含有至少一种通式(I)的液晶化合物的液晶组合物,至少含有一种手性近晶液晶组合物 描述了一种通式(I)的液晶化合物和使用含有至少一种通式(I)的液晶化合物的手性近晶液晶组合物的光学开关元件。