利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

29 条记录 (耗时 0.036 秒)

    Liquid crystal compounds having a chiral fluorinated terminal portion
    7.
    发明授权
    Liquid crystal compounds having a chiral fluorinated terminal portion 失效

    公开(公告)号：US6030547A

    公开(公告)日：2000-02-29

    申请号：US998400

    申请日：1997-12-24

    申请人： Masakazu Hasegawa ,  Michael P. Keyes ,  Marc D. Radcliffe ,  Patricia M. Savu ,  Daniel C. Snustad ,  Terence D. Spawn

    发明人： Masakazu Hasegawa ,  Michael P. Keyes ,  Marc D. Radcliffe ,  Patricia M. Savu ,  Daniel C. Snustad ,  Terence D. Spawn

    摘要： Fluorine-containing, chiral liquid crystal compounds comprise (a) a chiral fluorochemical terminal portion comprising (i) at least one chiral center, which can optionally be heteroatom-substituted; (ii) a terminal fluoroalkyl, fluoroether, perfluoroalkyl, or perfluoroether group; and (iii) an alkylene or fluoroalkylene group optionally containing at least one caternary ether oxygen atom; (b) a chiral or achiral terminal portion consisting of a hydrocarbon or hydrocarbon ether group, and, when chiral, comprising at least one chiral center, which can optionally be heteroatom-substituted; and (c) a central core connecting the terminal portions; the alkylene or fluoroalkylene group of the chiral fluorochemical terminal portion having at least 3 in-chain atoms and being located between the chiral center of the chiral fluorochemical terminal portion and the central core. The compounds have smectic mesophases or latent smectic mesophases and are useful, for example, in liquid crystal display devices.

    Liquid crystal compounds having a chiral fluorinated terminal portion
    8.
    发明授权
    Liquid crystal compounds having a chiral fluorinated terminal portion 失效
    具有手性氟化末端部分的液晶化合物

    公开(公告)号：US06309561B1

    公开(公告)日：2001-10-30

    申请号：US08998400

    申请日：1997-12-24

    申请人： Masakazu Hasegawa ,  Michael P. Keyes ,  Marc D. Radcliffe ,  Patricia M. Savu ,  Daniel C. Snustad ,  Terence D. Spawn

    发明人： Masakazu Hasegawa ,  Michael P. Keyes ,  Marc D. Radcliffe ,  Patricia M. Savu ,  Daniel C. Snustad ,  Terence D. Spawn

    IPC分类号： C09K1934

    CPC分类号： C07D239/26 ,  C07D239/34 ,  C09K19/3405 ,  C09K19/3463 ,  C09K19/3469 ,  C09K19/3491 ,  C09K19/3497 ,  C09K2019/3408

    摘要： Fluorine-containing, chiral liquid crystal compounds comprise (a) a chiral fluorochemical terminal portion comprising (i) at least one chiral center, which can optionally be heteroatom-substituted; (ii) a terminal fluoroalkyl, fluoroether, perfluoroalkyl, or perfluoroether group; and (iii) an alkylene or fluoroalkylene group optionally containing at least one catenary ether oxygen atom; (b) a chiral or achiral terminal portion consisting of a hydrocarbon or hydrocarbon ether group, and, when chiral, comprising at least one chiral center, which can optionally be heteroatom-substituted; and (c) a central core connecting the terminal portions; the alkylene or fluoroalkylene group of the chiral fluorochemical terminal portion having at least 3 in-chain atoms and being located between the chiral center of the chiral fluorochemical terminal portion and the central core. The compounds have smectic mesophases or latent smectic mesophases and are useful, for example, in liquid crystal display devices.

    摘要翻译： 含氟手性液晶化合物包含（a）手性含氟末端部分，其包含（i）至少一个可任选被杂原子取代的手性中心; （ii）末端氟代烷基，氟代醚，全氟烷基或全氟醚基团; 和（iii）任选地含有至少一个链状醚氧原子的亚烷基或氟亚烷基; （b）由烃或烃醚基组成的手性或非手性末端部分，以及当手性包含至少一个手性中心时，该手性中心可任选被杂原子取代; 和（c）连接端子部分的中心芯部; 手性含氟末端部分的亚烷基或氟亚烷基具有至少3个链内原子并且位于手性含氟末端部分的手性中心和中心核心之间。 这些化合物具有近晶中间相或潜在的近晶中间相，并且可用于例如液晶显示装置。

    Compounds and process for controlling cone tilt angle in mixtures of smectic liquid crystal compounds
    9.
    发明授权
    Compounds and process for controlling cone tilt angle in mixtures of smectic liquid crystal compounds 失效
    用于控制近晶液晶化合物混合物中的锥角倾斜角的化合物和方法

    公开(公告)号：US5855812A

    公开(公告)日：1999-01-05

    申请号：US827753

    申请日：1997-04-11

    申请人： Marc D. Radcliffe ,  Patricia M. Savu ,  Daniel C. Snustad ,  Terence D. Spawn

    发明人： Marc D. Radcliffe ,  Patricia M. Savu ,  Daniel C. Snustad ,  Terence D. Spawn

    IPC分类号： G02F1/13 ,  C07D239/26 ,  C07D239/34 ,  C09K19/04 ,  C09K19/06 ,  C09K19/34 ,  C09K19/42 ,  C09K19/52 ,  C07C22/00

    CPC分类号： C07D239/26 ,  C09K19/04 ,  C09K19/3469

    摘要： A process for controlling the cone tilt angle of a tilted smectic liquid crystal composition comprises the step of combining (a) at least one liquid crystal composition comprising at least one smectic or latent smectic liquid crystal compound comprising (i) an aliphatic fluorocarbon terminal portion comprising a terminal fluoroalkyl or fluoroether group and an alkylene group having at least two carbon atoms and containing at least one catenary ether oxygen atom, (ii) an aliphatic hydrocarbon terminal portion, and (iii) a central core connecting the terminal portions, wherein the alkylene group of the aliphatic fluorocarbon terminal portion is directly linked to the central core by a moiety selected from the group consisting of a covalent bond, --CH.dbd.CH--, and --C.tbd.C--; and (b) at least one liquid crystal composition comprising at least one smectic or latent smectic liquid crystal compound; with the provisos that at least one of the compositions (a) and (b) comprises at least one chiral liquid crystal compound and that the combining of compositions (a) and (b) provides an optically active, tilted chiral smectic liquid crystal composition. The process enables control of cone tilt angle and thereby control of the brightness characteristics of liquid crystal display devices.

    摘要翻译： 用于控制倾斜的近晶液晶组合物的锥体倾斜角的方法包括将（a）至少一种液晶组合物组合的步骤，所述液晶组合物包含至少一种近晶或潜暗的近晶液晶化合物，所述液晶组合物包含（i）脂族碳氟化合物末端部分， 末端氟代烷基或氟代醚基和具有至少两个碳原子并且含有至少一个链状醚氧原子的亚烷基，（ii）脂族烃末端部分和（iii）连接末端部分的中心核心，其中亚烷基 脂肪族碳氟化合物末端部分的基团通过选自共价键，-CH = CH-和-C 3 C-C的部分直接连接到中心核心; 和（b）至少一种液晶组合物，其包含至少一种近晶或潜层间的近晶液晶化合物; 条件是组合物（a）和（b）中的至少一种包含至少一种手性液晶化合物，并且组合物（a）和（b）的组合提供光学活性的倾斜手性近晶液晶组合物。 该过程能够控制锥形倾斜角度，从而控制液晶显示装置的亮度特性。