Biphenyl esters and liquid crystal materials and devices containing them
    3.
    发明授权
    Biphenyl esters and liquid crystal materials and devices containing them 失效
    联苯酯和含有它们的液晶材料和装置

    公开(公告)号:US4769176A

    公开(公告)日:1988-09-06

    申请号:US923825

    申请日:1986-10-30

    摘要: Biphenyl esters of formula (I), wherein formula (II) represents formula (III) or formula (IV), R.sub.1 represents C.sub.3 -C.sub.12 alkyl, alkoxy, alkylcarbonyloxy, alkoxycarbonyl or alkoxycarbonyloxy, j is 0 or 1, R.sub.2 represents C.sub.3 -C.sub.12 alkyl or alkoxy, one of Q.sub.1 or Q.sub.2 is fluorine and the other is hydrogen, provided that when j is 0 and formula (II) is formula (III) and both R.sub.1 and R.sub.2 are n-alkyl, then the total number of carbon atoms in R.sub.1 and R.sub.2 is more than 12. These compounds may be used as constituents of liquid crystal mixtures which show a room temperature ferroelectric smectic phase, and a number of such mixtures are described.

    摘要翻译: PCT No.PCT / GB86 / 00040 Sec。 371日期1986年10月30日第 102(e)1986年10月30日PCT PCT日期:1986年1月21日PCT公布。 出版物WO86 / 04327 日期:1986年7月31日。式(I)的二苯基酯,其中式(II)表示式(III)或式(Ⅳ),R1表示C3-C12烷基,烷氧基,烷基羰基氧基,烷氧基羰基或烷氧基羰氧基,j为0或 1,R2表示C3-C12烷基或烷氧基,Q1或Q2中的一个为氟,另一个为氢,条件是当j为0且式(II)为式(III)时,R1和R2均为正烷基, 那么R1和R2中的碳原子总数大于12.这些化合物可以用作显示室温铁电近晶相的液晶混合物的组分,并且描述了许多这样的混合物。

    Thermochromic mixtures
    4.
    发明授权
    Thermochromic mixtures 失效
    热变性混合物

    公开(公告)号:US5188815A

    公开(公告)日:1993-02-23

    申请号:US424264

    申请日:1989-10-04

    摘要: The invention relates to thermochromic liquid crystalline phases with at least two components, characterized in that at least one component is an optically active compound of the formula I ##STR1## wherein R.sup.1 and R.sup.2 are each independently a chiral residue, importing to the phase a tight helical twist. ##STR2## denotes a 1,4-phenylene group optionally substituted by fluorine, X.sup.1 and X.sup.2 are each independently O or NH,n is 1, 2 or 3 andm is 0 or 1, which can be used in electro-optic devices, in temperature indicating devices or for color-changing cosmetics.

    摘要翻译: PCT No.PCT / EP89 / 00965 Sec。 371日期:1989年10月4日 102(e)日期1989年10月4日PCT PCT 1989年8月16日PCT公布。 公开号WO90 / 02161 日本1990年3月8日。本发明涉及具有至少两种组分的热致变色液晶相,其特征在于至少一种组分是式I(I)的光学活性化合物,其中R 1和R 2各自独立地 手性残留物,进入阶段紧密的螺旋扭转。 表示任选被氟取代的1,4-亚苯基,X1和X2各自独立地为O或NH,n为1,2或3,m为0或1,其可用于电光器件, 温度指示装置或变色化妆品。

    Optically active naphthalene compounds and liquid crystal materials and
devices incorporating them
    5.
    发明授权
    Optically active naphthalene compounds and liquid crystal materials and devices incorporating them 失效
    光学活性萘甲酸化合物和液晶材料和装置

    公开(公告)号:US5061399A

    公开(公告)日:1991-10-29

    申请号:US285963

    申请日:1987-04-27

    IPC分类号: C07C69/773 C09K19/32

    CPC分类号: C09K19/322

    摘要: Optically active naphthalene compounds having the formula: ##STR1## in which X and Y are selected from combinations (a), (b) and (c): (a) X is C.sub.1-10 alkyl or alkoxy and Y is C.sub.4-16 optically active alkyl, (b) X is C.sub.1-10 alkyl or alkoxy and Y is ##STR2## where R.sup.2 is C.sub.4-16 optically active alkyl, (c) X is ##STR3## where R.sup.1 is C.sub.1-10 alkyl or alkoxy and Y is C.sub.4-16 optically active alkyl. Ferroelectric smectic liquid crystal materials being compositions containing these compounds are also described.

    摘要翻译: 具有下式的其中X和Y选自组合(a),(b)和(c))的光学活性萘化合物:(a)X是C 1-10烷基或烷氧基,Y是C 4-16 光学活性烷基,(b)X是C 1-10烷基或烷氧基,Y是其中R 2是C 4-6光学活性烷基,(c)X是其中R 1是C 1-10烷基或烷氧基,Y 是C4-16光学活性烷基。 还描述了作为含有这些化合物的组合物的铁电近晶体液晶材料。