Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1977-01-19
1979-01-30
Gotts, Lewis
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
252299, 350350, C07C15311, C09K 334, G02F 113
Patent
active
041372506
ABSTRACT:
Novel compounds exhibiting liquid crystal properties have the formula ##STR1## wherein .phi. is a benzene ring containing hydrogen atoms or an inert substituent therefor at other than the para position, and R and R' are, independently in each case, a hydrocarbyl group containing from about 1 to about 20 carbon atoms, a nitrogen containing group, or a halogen. Novel liquid crystal compositions include at least one of these compounds, preferably present in a mixture of at least two homologous liquid crystal compounds in substantially eutectic proportions. These liquid crystal compounds and compositions have greater nematic stability than their corresponding disubstituted phenylbenzoate analogs. They may be used in liquid crystal displays, particularly field effect nematic liquid crystal displays.
REFERENCES:
rheinboldt, H., et al., "Binary Systems of Aromatic Esters and Thioesters", Chem. Abst., 1952, 7555A.
Martens, J., et al., "Organosulfur Compounds, VII, Photochemical .alpha.-Cleavage of S-p-tolyl Thiobenzoates in Solution", Chem. Ber. 107, 2319-2325 (1974).
Fisher John A.
Gotts Lewis
Motorola Inc.
Whittenbaugh Robert C.
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