利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

121 条记录 (耗时 0.043 秒)

    Liquid-crystal medium having a low threshold voltage
    114.
    发明授权
    Liquid-crystal medium having a low threshold voltage 有权

    公开(公告)号：US07033651B2

    公开(公告)日：2006-04-25

    申请号：US10257635

    申请日：2001-04-17

    申请人： Michael Heckmeier ,  Detlef Pauluth

    发明人： Michael Heckmeier ,  Detlef Pauluth

    IPC分类号： C09K19/30 ,  C09K19/34 ,  C09K19/12 ,  C09K19/20

    CPC分类号： C09K19/3001 ,  C09K19/44 ,  Y10T428/10

    摘要： The invention relates to a liquid-crystalline medium comprising a mixture of at least two compounds of the general formula (I) R1-Am-Bn-Z1-C-Z2-D-R2  (I) in which R1 is H, an alkyl or alkenyl radical having 1 to 15 carbon atoms and 2 to 15 carbon atoms, respectively, which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen, where one or more CH2 groups in these radicals may also, in each case independently of one another, be replaced by —O—, —S—,  —CO—, —CO—O—, —O—CO— or —O—CO—O— in such a way that O atoms are not linked directly to one another; A, B, C and D are each, independently of one another, in which Y, Y1, Y2, Y3, Y4, Y5 and Y6 are each, independently of one another, H or F; C is, in addition to the abovementioned meanings, Z1 and Z2 are each, independently of one another, a single bond, —CH2O—, —OCH2—, —CH2—CH2—, —CH═CH—, —C≡C—, —CF2—CF2—, 13 CF2O—, —OCF2— or —CO—O—; R2 is, in addition to the abovementioned meanings of R1, F, CF3, OCF3, OCHF2, OCH2CF2H; and m and n are each, independently of one another, 0 or 1, with the proviso that Z1 is a single bond when m and n are 0, characterized in that the mixture comprises a) from 30 to 90% by weight of compounds of the general formula (I) having Δ∈≧9(=highly polar compounds); b) from 0 to 30% by weight of compounds of the general formula (I) having 1≦Δ∈≦9(=polar compounds); c) from 10 to 40% by weight of compounds of the general formula (I) having −1≦Δ∈≦1(=neutral compounds); the sum of a), b) and c) being 100% by weight.