Ferroelectric liquid crystal systems with high spontaneous...

Details Ferroelectric liquid crystal systems with high spontaneous... Ferroelectric liquid crystal systems with high spontaneous...

C - Chemistry, Metallurgy

09

K

C09K 19/34 (2006.01) C09K 19/02 (2006.01) C09K 19/58 (2006.01) G02F 1/137 (2006.01) G02F 1/141 (2006.01)

Patent

CA 2049312

HOE 89/F 094 Abstract of the disclosure Ferroelectric liquid-crystal systems having high spon- taneous polarization and good orientation properties Ferroelectric liquid-crystal system having high spon- taneous polarization, in particular > 35 nC cm-2, and good orientation properties in the ferroelectric phase, in particular the Sc* phase, contain at least three differ- ent optically active compounds, preferably as dopes in a base mixture which is not itself optically active and has a nematic phase above the smectic phase. The optically active compounds are selected so that they do not all induce a helix of the same rotation sense in the nematic phase. Their relative concentrations are selected so that the total resultant pitch of the helix throughout the cholesteric phase is not less than 10 µm.

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