Liquid crystal composition

Details Liquid crystal composition Liquid crystal composition

C - Chemistry, Metallurgy

09

K

31/105

C09K 3/34 (1980.01)

Patent

CA 1047244

ABSTRACT OF THE DISCLOSURE A liquid crystal composition comprises a liquid crystal and a carboxylic acid or its ester as an additive. By the presence of the additive, the longitudinal axes of liquid crystal molecules can be spontaneously oriented in a direction perpendicular to the surface of a holding wall of a liquid crystal display plate. In particular, the additives may be esters of p-hydroxy- or m-hydroxy-benzoic acid, phenylacetic acids having 1 or 2 hydroxy groups or their esters, phenylpropionic acids having 1 or 2 hydroxy groups or their esters, or 3,4,5-trihydroxybenzoic acid esters, or the additive may be selected from the group consisting of com- pounds having the formulae: Image wherein R3 is hydrogen or a normal alkyl group having 1 to 18 carbon atoms; R5 is hydrogen, hydroxy, a normal alkyl group having 1 to 16 carbon atoms or a normal alkoxy group having 1 to 16 carbon atoms; R6 is hydrogen, hydroxy or nitro; n1 is 1 or 2; and n2 is 0, 1 or 2.

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