Thermochromic mixtures
    1.
    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
    3.
    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。

    Biphenyl esters and liquid crystal materials and devices containing them
    6.
    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。

    Smectic A liquid crystal compositions
    7.
    发明授权
    Smectic A liquid crystal compositions 失效
    近晶A液晶组合物

    公开(公告)号:US4834906A

    公开(公告)日:1989-05-30

    申请号:US923794

    申请日:1986-09-22

    CPC分类号: C09K19/12 C09K19/42

    摘要: Liquid crystal compositions comprising as a first part between 40 and 99% by weight in aggregate of one or more materials selected from one or more of the six compound classes (1) to (3'), wherein R is in every instance an alkyl chain containing between 2 and 18 carbon atoms and R' is in every instance an alkyl chain containing between 1 and 17 carbon atoms, wherein one or more non-adjacent CH.sub.2 -groups are replaced by oxygen atoms, and as a second part between 1 and 60% by weight of one or more materials of high birefringence and high positive dielectric anisotropy which raise the S.sub.A -N transition temperature, exhibit a smectic A phase of relatively low melting point and wide smectic range. Such compositions may be used in liquid crystal cells, not only in display or optical information processing applications, but also for instance in temperature sensing applications. The operation of such cells may involve laser addressing, thermal or electrical addressing. ##STR1##

    摘要翻译: PCT No.PCT / EP85 / 00731 Sec。 371日期1986年9月22日 102(e)1986年9月22日PCT PCT 1990年12月20日PCT公布。 公开号WO86 / 04324 日期:1986年7月31日。液晶组合物,其包含作为选自六种化合物类别(1)至(3')中的一种或多种的一种或多种材料的总量为40至99重量%的第一部分,其中R 在任何情况下都是含有2至18个碳原子的烷基链,R'在任何情况下都是含有1至17个碳原子的烷基链,其中一个或多个不相邻的CH2-基团被氧原子取代,并且作为 引起1〜60%(重量)的一种或多种提高SA-N转变温度的高双折射和高正介电各向异性的材料的第二部分显示出相对低的熔点和宽的近晶范围的近晶A相。 这样的组合物不仅可用于显示器或光学信息处理应用中,而且还可用于温度感测应用中。 这种电池的操作可能涉及激光寻址,热或电寻址。 (1)(2)(3)(1')(2')(3')

    2,3-difluorohydroquinone derivatives
    9.
    发明授权
    2,3-difluorohydroquinone derivatives 失效
    2,3-二氟氢醌衍生物

    公开(公告)号:US5248447A

    公开(公告)日:1993-09-28

    申请号:US871620

    申请日:1992-04-21

    摘要: 2,3-difluorohydroquinone compounds of the formula I ##STR1## in which R.sup.1 and R.sup.2, in each case independently of one another, are alkyl having 1 to 15 C atoms or alkenyl having 3 to 15 C atoms which are unsubstituted, monosubstituted by cyano or at least monosubstituted by fluorine or chlorine, it also being possible for one CH.sub.2 group in these radicals to be replaced by --O--, --CO--, --CO--O--, --O--CO-- or --O--CO--O--,A.sup.1, A.sup.2 and A.sup.3, in each case independently of one another, are(a) trans-1,4-cyclohexylene, in which, in addition, one or two non-adjacent CH.sub.2 groups may be replaced by --O-- and/or --S--,(b) 1,4-phenylene, in which, in addition, one or two CH groups may be replaced by N, or(c) a radical from the group comprising piperidine-1,4-diyl, 1,4-bicylo (2,2,2)-octylene (sic), 1,3,4-thiadiazole-2,5-diyl, napththalene-2,6-diyl, decahydronaphthalene-2,6-diyl and 1,2,3,4-tetrahydronaphthalene-2,6-diyl, it being possible for the radicals (a) and (b) to be monosubstituted or polysubstituted by F, Cl, CH.sub.3 or CN,Z.sup.1 is --CO--O--, --O--CO--, --CH.sub.2 CH.sub.2 --, --OCH.sub.2 --, --CH.sub.2 O--, --C.tbd.C-- or a single bond,Q.sup.1 and Q.sup.2, in each case independently of one another, are --CO-- or --CH.sub.2 --,m and n are each 0, 1 or 2, and(m+n) is 0, 1 or 2,are suitable as components of liquid-crystalline phases.

    摘要翻译: PCT No.PCT / EP89 / 00179 371日期:1989年5月15日 102(e)日期1989年5月15日PCT提交1989年2月27日PCT公布。 出版物WO89 / 08637 日本1989年9月21日。式I的1,3-二氟氢醌化合物其中R 1和R 2各自独立地为具有1至15个碳原子的烷基或具有3至15个C原子的烯基, 是未取代的,被氰基单取代或至少被氟或氯单取代,这些基团中的一个CH 2基团也可被-O - , - CO - , - CO-O-,-O-CO-或 -O-CO-O-,A1,A2和A3各自独立地是(a)反式-1,4-亚环己基,此外,一个或两个不相邻的CH 2基可以是 被-O-和/或-S-取代,(b)1,4-亚苯基,其中另外一个或两个CH基团可被N取代,或(c)包含哌啶 - 1,4-二酰基,1,4-双酰(2,2,2) - 辛烯(sic),1,3,4-噻二唑-2,5-二基,萘-2,2二基,十氢萘-2, 6-二基和1,2,3,4-四氢化萘-2,6-二基,基团(a)和(b)可以是单取代的或聚合的 被F,Cl,CH 3或CN取代,Z 1是-CO-O - , - O - CO - , - CH 2 CH 2 - , - OCH 2 - , - CH 2 O-,-C 在每种情况下彼此独立地是-CO-或-CH2-,m和n各自为0,1或2,并且(m + n)为0,1或2,适合作为液晶相的组分 。