Liquid crystal compositions
AssigneeThe Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
InventorsGeorge William Gray, Kenneth John Harrison, David Sanderson Hulme, Edward Peter Raynes
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Abstract
A range of eutectic mixtures containing at least three compounds having the formula ##SPC1## Where X.sup.1 is an alkyl group, an alkoxy group or a substituted phenyl group ##SPC2## Where R is an alkyl or alkoxy group, are described. The eutectic mixtures extend the temperature ranges over which their constituent compounds exhibit liquid crystal properties and are thus useful in liquid crystal devices operating in those temperature ranges.
Claims15
A liquid crystal material consisting of
- an eutectic mixture of at least three compounds having the formula ##SPC8##
- wherein x.sup.1 is selected from the group consisting of an alkyl group, an alkoxy group, a substituted phenyl group ##SPC9##
- wherein R.sup.1 represents an alkyl group, and a substituted phenyl group ##SPC10##
- where R.sup.2 represents an alkoxy group, the total number of carbon atoms in the alkyl or alkoxy moieties of X.sup.1 ranging from 3 to 9.
Dependencies are inferred from the claim text.