发明授权
- 专利标题： Nematic liquid-crystalline phases
- 专利标题（中）： 向列液晶相
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申请号： US389713申请日： 1989-08-04
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公开(公告)号： US5318721A公开(公告)日： 1994-06-07
- 发明人: Volker Reiffenrath , Joachim Krause , Thomas Geelhaar , Rudolf Eidenschink , Hans-Adolf Kurmeier , Eike Poetsch , Bernhard Scheuble , Georg Weber
- 申请人： Volker Reiffenrath , Joachim Krause , Thomas Geelhaar , Rudolf Eidenschink , Hans-Adolf Kurmeier , Eike Poetsch , Bernhard Scheuble , Georg Weber
- 申请人地址： DEX Darmstadt
- 专利权人： Merck Patent Gesellschaft mit beschrankter Haftung
- 当前专利权人： Merck Patent Gesellschaft mit beschrankter Haftung
- 当前专利权人地址： DEX Darmstadt
- 优先权： DEX3614778 19860502
- 主分类号： C09K19/20
- IPC分类号： C09K19/20 ; C09K19/30 ; C09K19/32 ; C09K19/34
摘要：
The invention relates to the use of trifluorotoluene derivatives of the formula I ##STR1## in which R.sup.1 is alkyl having 1 to 12 carbon atoms in which, in addition, one or more non-neighboring CH.sub.2 groups may be replaced by --O--, --CO--, --O--CO--, --CO--O--, --O--CO--O--, --CH-halogen, --CH--CN-- and/or --CH.dbd.CH--,A.sup.1 and A.sup.2, in each case independently of one another, are 1,4-phenylene in which, in addition, one or more CH groups may be replaced by N, trans-1,4-cyclohexylene in which, in addition, one or two non-neighboring CH.sub.2 groups may be replaced by --O-- and/or --S--, or 1,4-bicyclo(2,2,2)octylene, each of which is unsubstituted or monosubstituted or polysubstituted by halogen, nitrile and/or CH.sub.3,Z.sup.1 and Z.sup.2, in each case independently of one another, are --CO--O--, --O--CO--, --CH.sub.2 O--, --OCH.sub.2 --, --CH.sub.2 CH.sub.2 -- or a single bond, andn is 0 or 1,as components of chiral tilted smectic phases.
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