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    • 3. 发明公开
    • Liquid crystalline compounds containing hydrocarbon groups, liquid crystalline compositions and liquid crystal display elements
    • Kohlenwasserstoffe enthaltendeFlüssigkristallverbindungen,FlüssigkristallzusammensetzungenundFlüssigkristallanzeigeelemente
    • EP0861828A1
    • 1998-09-02
    • EP98250075.3
    • 1998-03-02
    • Chisso Corporation
    • Ohnishi, NoriyukiTakeuchi, HiroyukiMiyazawa, KazutoshiHachiya, NorihisaNakagawa, Etsuo
    • C07C255/50C07C13/28C09K19/04C09K19/30C09K19/42C09K19/44C09K19/46
    • C07D239/26C07C13/28C07C17/16C07C17/2635C07C22/02C07C22/08C07C25/24C07C43/162C07C43/188C07C43/205C07C43/225C07C45/44C07C255/46C07C255/50C07C255/54C07C255/55C07C2601/14C07C2601/16C07D213/06C07D213/61C07D239/34C07D319/06C09K19/04C09K19/3001C09K19/3003C09K19/3059C09K19/42C09K19/44C09K19/46C09K2019/0448C09K2019/0451C07C22/04C07C47/238
    • Disclosed are (A) a liquid crystalline compound of the general formula:
      wherein X 1 stands for a hydrogen atom, a cyano group, a halogen atom, or an alkyl group with 1-20 carbon atoms, and one or more methylene groups in the alkyl group may be replaced by -CH=CH-, -C≡C-, or oxygen atoms and one or more hydrogen atoms may be substituted by halogen atoms; X 2 stands for a hydrogen atom, an alkyl group with 1-10 carbon atoms, or a substituent of -(A 5 -Z 4 ) S -A 6 -X 3 ; 1, m, n and s each stands for an integer of 0 or 1, and p, and q each stands for an integer of 0-5; X 3 for an alkyl group with 1-10 carbon atoms; Z 1 -Z 4 each independently stands for a covalent bond or an alkylene group with 1-5 carbon atoms, and one or more methylene groups in the alkylene group may be replaced by -CH=CH-, -C≡C-, or an oxygen atom and one or more hydrogen atoms in the alkylene group may be substituted by halogen atoms; the ring A 1 -A 6 each independently stands for a 1,4-phenylene, a 1,4-cyclohexenylene, or a trans-1,4-cyclohexylene, and the carbon atoms in the ring may be replaced by nitrogen atoms or oxygen atoms and the hydrogen atoms in the ring may be substituted by halogen atoms or cyano groups; and B 1 and B 2 each independently stands for -CH=CH- or -C≡C-, with the proviso that both of B 1 and B 2 should not be -CH=CH- at the same time, (B) a liquid crysline composition comprising at least one liquid crystalline compound of the general formula (1), and (C) a liquid crystal display element wherein the composition (B) is used. The liquid crystalline compounds of the present invention are distinguished by their characteristics of steep threshold voltage, an adequate magnitude of values in optical or dielectric anisotropy, an extremely high ratio of elastic constants and low viscosity in addition to good compatibility with other liquid crystalline compounds.
    • 公开了(A)通式为:CHEM的液晶化合物,其中X1表示氢原子,氰基,卤素原子或具有1-20个碳原子的烷基,以及一个或多个亚甲基 在烷基中可以被-CH = CH-,-C≡C-取代的C-或氧原子代替,一个或多个氢原子可以被卤素原子取代; X2代表氢原子,具有1-10个碳原子的烷基或 - (A5-Z4)S-A6-X3的取代基; 1,m,n和s分别表示0或1的整数,p和q分别表示0〜5的整数。 X3为具有1-10个碳原子的烷基; Z1-Z4各自独立地代表共价键或具有1-5个碳原子的亚烷基,并且亚烷基中的一个或多个亚甲基可以被-CH = CH-,-C-识别的C-或氧 原子和亚烷基中的一个或多个氢原子可以被卤素原子取代; 环A1-A6各自独立地代表1,4-亚苯基,1,4-亚环己烯基或反式-1,4-亚环己基,并且该环中的碳原子可以被氮原子或氧原子取代, 环中的氢原子可以被卤素原子或氰基取代; 并且B1和B2各自独立地代表-CH = CH-或-C元素C-,条件是B1和B2两者不应同时为-CH = CH-,(B)液体cry线组合物,其包含 至少一种通式(1)的液晶化合物和(C)使用组合物(B)的液晶显示元件。 本发明的液晶化合物的特征在于其陡峭的阈值电压,适当的光学或介电各向异性的量值,极高的弹性常数比和低粘度以及与其它液晶化合物的良好相容性的特性。