| 摘要 |
<p>Liquid crystal medium comprises one or more dielectro positive benzoic acid compound (I) and one or more dielectro positive difluoromethoxy phenyl compound (II). Liquid crystal medium comprises one or more dielectro positive benzoic acid compounds of formula (I) and one or more dielectro positive difluoromethoxy phenyl compound of formula (II). R0>, R1>H or up to 12C alkyl or alkenyl (optionally mono-substituted by CN or CF3 or optionally substituted with one or more halo), where one or more CH2 group may be replaced by -O-, -S-, -cyclobutane-, -CH=CH-, -Ctriple boundC-, -CO-, -CO-O-, -O-CO- or -O-CO-O-, and the O atoms are not directly bonded; L1>-L7>H or F; A1>-A3>cyclic compound of formula (VII-XII); Y1>F (preferred), Cl or one or more fluorinated 1-4C alklyl or alkoxy; and p, q, n : 0 or 1. Independent claims are included for: (1) an electro optical display comprising the liquid crystal medium; and (2) a method for preparing the liquid crystal medium comprising mixing (I), (II) and optionally one or more dielectro positive components of formulae (IIIa), (IIIb), and (IV-1) to (IV-5) with liquid crystalline co-components and optionally adding additives. R3>R1>; R4>1-7C-alkyl, 1-7C-alkoxy, 2-7C- alkoxyalkyl, alkenyl or alkenyloxy; X1>Y1>; Y2>H or F; and Z11>, Z12>-CH2-CH2-, -CH=CH-, -CH2-CF2-, -CF2-CH2-, -CF2-CF2-, -OCH2-, -CH2O- or a bond. [Image] [Image] [Image] [Image] [Image] [Image] [Image] [Image].</p> |
