Liquid crystalline piperidine derivatives
AssigneeMerck Patent GmbH
InventorsWolfgang Sucrow, Wolfgang Schatull, Peter Fuss
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Abstract
New piperidine derivatives ##STR1## in which R.sup.1 and R.sup.2 each independently is alkyl or alkoxy each of 1 to 10 C atoms, --Y--Z, F, Cl, Br or CN, and the radical R.sup.1 can also be H, Y is --CO--O--, --O--CO or a single bond, Z is --Q--R.sup.3 or alkyl having 1-10 C atoms, Q is 1,4-phenylene or 1,4-cyclohexylene, R.sup.3 is alkyl having 1-10 C atoms, F or CN, and A is 1,4-cyclohexylene or 1,3-dioxane-2,5-diyl, and their acid addition salts, can be used as components of dielectrics for electro-optical display elements.
Claims10
A liquid crystalline dielectric material useful in electro-optical display elements and comprising at least two liquid crystalline components, wherein at least one component is a piperidine derivative of the formula ##STR4## wherein R.sup.2 is alkyl or alkoxy each of 1 to 10 carbon atoms, F, CL or Br or an acid addition salt thereof.
Dependencies are inferred from the claim text.