Liquid crystal materials

Details Liquid crystal materials Liquid crystal materials

C - Chemistry, Metallurgy

07

C

31/105, 345/8, 2

C07C 69/76 (2006.01) C07C 43/20 (2006.01) C07C 45/46 (2006.01) C07C 51/29 (2006.01) C09K 19/32 (2006.01)

Patent

CA 1120490

ABSTRACT OF THE DISCLOSURE Novel liquid crystal materials are provided having the general formula Image where A is a 4-alkylphenyl group and B is a 2-(6-alkyl)naphthyl group, or vice versa, wherein the alkyl groups in A and B may be the same or different. These materials have a dielectric animotropy sign change at moderate frequencies, ie in the range 1kHz to 50kHz and are thus useful for twisted nematic device cells of the frequency switching type 1?

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