Liquid crystalline diketones
AssigneeMerck Patent Gesellschaft mit beschraenkter Haftung
InventorsRudolf Eidenschink, Ludwig Pohl
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Abstract
Diketones of the formula ##STR1## wherein R.sub.1 is alkyl, perfluoroalkyl or alkoxy, each of 1-18 carbon atoms; R.sub.2 is alkyl or perfluoroalkyl, each of 1-12 carbon atoms; and X is 1,4-trans-cyclohexylene, 1,4-phenylene or 4,4'-cyclohexylphenyl are liquid crystalline compounds.
Claims7
A liquid crystal dielectric, comprising at least two liquid crystal components, at least one being a diketone of the formula ##STR17## wherein R.sub.1 is alkyl, perfluoroalkyl or alkoxy, each of 1-18 carbon atoms;
- R.sub.2 is alkyl or perfluoroalkyl, each of 1-12 carbon atoms;
- and X is 1,4-trans-cyclohexylene, 1,4-phenylene or 4,4'-cyclohexylphenyl.
A composition comprising a diketone of the formula ##STR18## wherein R.sub.1 is alkyl, perfluoroalkyl or alkoxy, each of 1-18 carbon atoms;
- R.sub.2 is alkyl or perfluoroalkyl, each of 1-12 carbon atoms;
- and X is 1,4-trans-cyclohexylene, 1,4-phenylene or 4,4'-cyclohexylphenyl and a liquid crystal dielectric doping agent or dichroitic dye.
Dependencies are inferred from the claim text.