Merck Patent Gesellschaft MIT Beschrankter Haftung

Ciba Specialty Chemicals Corporation

Klaus Praefcke

Bernd Kohne

Eike Poetsch

Rudolf Eidenschink

Wadi Poules

Bernhard Scheuble

Abul Iqbal

Zhimin Hao

Claus P Herz

Dietmar Schmidt

Werner Stephan

Nancy Tebaldi

A liquid crystalline compound of formula ##STR1## wherein B and D are each independently of the other C.sub.6 -C.sub.24 alkyl, ##STR2## L is ##STR3## methyl or C.sub.10 -C.sub.18 alkyl, wherein R.sub.1 is C.sub.4 -C.sub.18 alkyl, with the proviso that when L is methyl, at least one of B and D is C.sub.6 -C.sub.24 alkyl;

Liquid crystalline diketopyrrolopyrroles

Carbocyclic compounds of the formula I ##STR1## wherein Q is a benzene or cyclohexane ring or a naphthalene system, X is in each case --CH.sub.2 --(CH.sub.2).sub.p -- where it is also possible for one or two non-adjacent CH.sub.2 groups to be replaced by --O--, --S--, --CO--, --O--CO--, --CO--O-- or --CH.dbd.CH--,

Carbocyclic compounds

Hexasubstituted cyclohexane compounds

Carbocyclic compounds of the formula I ##STR1## wherein Q is a benzene or cyclohexane ring or a naphthalene system,

Six-membered ring compounds of the formula I ##STR1## wherein A is a benzene or cyclohexane ring,

Carbocyclic six-membered ring compounds

Polymer compositions exhibiting liquid-crystalline phases contain chemically bonded mesogenic groups of the formula Ia and/or Ib: ##STR1## in which Q.sup.1 is H, alkyl or alkoxy having 1-5 C atoms, F, Cl, Br or CN,

Polymer compositions exhibiting liquid-crystalline phases

Triphenylene derivatives of the formula I ##STR1## wherein X.sup.1 to X.sup.6 are each, independently of one another, --SH, --SR, --SOR, --SO.sub.2 R or --S--COR, and each R is an alkyl group with up to 20 C atoms, it being possible for one or two CH.sub.2 groups to be replaced by O atoms and/or by unsubstituted or substituted vinylene or vinylidene groups, may be used as components of discotic liquid-crystalline phases.

Triphenylene derivatives

Cyclohexylcarbonitrile derivatives of the formula I ##STR1## wherein Y is ##STR2## X is --COO--, --O--CO, --CH.sub.2 O--, --OCH.sub.2 -- or --CH.sub.2 CH.sub.2 --, and R is alkyl or alkoxy each of 1-12 carbon atoms, with the proviso that Y is not ##STR3## when X is --COO--; and all cyclohexyl rings are trans, are valuable liquid crystalline components.

Growing community of inventors

Berlin, Germany

Klaus Praefcke