Liquid crystals esters
AssigneeThe Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
InventorsGeorge W. Gray, David Lacey, Martin G. Pellatt, Bennett Sturgeon
Life of this patent
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Abstract
A liquid crystal ester has a structure: ##STR1## where X and Y are fluorine or hydrogen at least one being hydrogen, and Z is either: (a) ##STR2## where R.sub.2 is alkyl, alkoxy, alkylcarbonyloxy or alkoxycarbonyloxy (b) ##STR3## where R.sub.3 is an alkyl group. The ester may be prepared by a conventional esterification from the corresponding phenol ##STR4## and the corresponding acid chloride Z--COCl. The ester may be used in mixtures with other liquid crystal compounds for use in known electro-optic devices.
Claims34
A liquid crystal ester compound having a molecular structure
- wherein X is fluorine and Y is hydrogen or X is hydrogen and Y is fluorine, R.sub.1 is an alkyl group and Z is ##STR40## where R.sub.3 is an alkyl group.
Dependencies are inferred from the claim text.