| 摘要 |
PURPOSE:To provide the title compsn. which is wide in smectic liq. crystal temp. range, exhibits a high degree of dielectric anisotropy and enables erasion of written information at low voltage, which comprises specific three kinds of compds. CONSTITUTION:At least one substance selected from among compds. of the formula I (wherein R1 is an 8-10C straight-chain alkoxy) is mixed with at least one substance selected from among compds. of the formula II (wherein R2 is an 8-9C straight-chain alkyl) and at least one substance selected form among compds. of the formula III (wherein R3 is an 8-12C straight-chain alkyl or alkoxy) to obtain the title compsn.
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