Liquid-crystalline mixture of low viscosity
    69.
    发明授权
    Liquid-crystalline mixture of low viscosity 失效
    低粘度的液晶混合物

    公开(公告)号:US5271865A

    公开(公告)日:1993-12-21

    申请号:US674367

    申请日:1991-04-10

    CPC分类号: C09K19/42 C09K19/44 C09K19/46

    摘要: The invention relates to a liquid-crystalline mixture containing one or more compounds of the general formula ##STR1## in which R.sup.1 is straight-chain alkyl having 2 to 12 carbon atoms in which, in addition, one CH.sub.2 group may be replaced by --O-- or --CH.dbd.CH--, the ring A is 1,4-phenylene or trans-1,4-cyclohexylene, and r is 0 or 1, and one or more highly dielectrically positive compounds selected from the group comprising the compounds of the general formulae II, III and IV in a weight ratio between the compounds of the formula I and the compounds of the formulae II, III and IV of from 1:10 to 10:1: ##STR2## in which R.sup.2 has one of the meanings indicated for R.sup.1, and X and Y are each, independently of one another, CH or N, ##STR3## in which R.sup.2 has one of the meanings indicated for R.sup.1, and X' and Y' are CH.sub.2 or O, ##STR4## in which R.sup.2 has one of the meanings indicated for R.sup.1, r is as defined above, the rings A.sup.1 and A.sup.2 have one of the meanings indicated for A, and L is H or F.

    摘要翻译: PCT No.PCT / EP91 / 00156 Sec。 371日期:1991年4月10日 102(e)1991年04月10日PCT 1991年1月28日PCT PCT。 出版物WO91 / 12294 日本1991年8月22日。本发明涉及含有一种或多种通式“I”的化合物的液晶混合物,其中R 1是具有2至12个碳原子的直链烷基,其中另外一个 CH 2基团可以被-O-或-CH = CH-取代,环A是1,4-亚苯基或反式-1,4-亚环己基,r是0或1,并且选择一个或多个高反应性正性化合物 来自包含通式II,III和IV的化合物的组,其中式I化合物与式II,III和IV的化合物的重量比为1:10至10:1: 其中R2具有对R1表示的含义之一,X和Y各自独立地为CH或N,其中R 2具有对R 1表示的含义之一,X'和Y 是CH2或O,其中R2具有对R1表示的含义之一,r如上所定义,环A1和A2具有对A表示的含义之一,L是 H或F.

    2,3-difluorohydroquinone derivatives
    70.
    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 。