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12 条记录 (耗时 0.017 秒)

    Liquid crystal mixture and liquid crystal device comprising the same
    1.
    发明授权
    Liquid crystal mixture and liquid crystal device comprising the same 失效
    液晶混合物和包含该液晶混合物的液晶装置

    公开(公告)号：US5762825A

    公开(公告)日：1998-06-09

    申请号：US538909

    申请日：1995-10-04

    申请人： Yoshiaki Tsubata ,  Kyoko Yamamoto ,  Koichi Fujisawa ,  Yukari Fujimoto ,  Tsutomu Matsumoto ,  Masayoshi Minai ,  Chizu Sekine

    发明人： Yoshiaki Tsubata ,  Kyoko Yamamoto ,  Koichi Fujisawa ,  Yukari Fujimoto ,  Tsutomu Matsumoto ,  Masayoshi Minai ,  Chizu Sekine

    IPC分类号： C09K19/30 ,  C09K19/42 ,  C09K19/44 ,  C09K19/46 ,  C09K19/06 ,  C09K19/12 ,  C09K19/34

    CPC分类号： C09K19/3001 ,  C09K19/42 ,  C09K19/44 ,  C09K19/46

    摘要： A liquid crystal mixture containing (a) at least one compound of a compound of the formula (1): ##STR1## in which R is a C.sub.1 -C.sub.12 alkyl group, etc.; X.sub.1, X.sub.2, X.sub.3, X.sub.4, Y.sub.1, Y.sub.2, Y.sub.3 and Y.sub.4 represent, independently each other, CH, CF or N; A is a hydrogen atom, a 4-R.sub.1 -(cycloalkyl) group, etc. in which R.sub. is a C.sub.1 -C.sub.12 alkyl group, etc. and p is 0 or 1; and Z is --C.tbd.C-- or a single bond, and (b) at least one compound of the formula (4): ##STR2## wherein rings C, D, E and F represent, independently each other, 1,4-phenylene, etc. which may be substituted by 1, 2 or 3 fluorine atoms; R.sub.2 is a hydrogen atom, a C.sub.1 -C.sub.12 alkyl group, etc.; R.sub.3 is a hydrogen atom, a fluorine atom, a fluoromethyl group, etc.; Z.sub.1, Z.sub.2 and Z.sub.3 represent, independently each other, --COO--, --OCO--, --OCH.sub.2 --, --CH.sub.2 O--, a C.sub.1 -C.sub.5 alkylene group, a C.sub.2 -C.sub.5 alkenylene group, etc.; J and K represent, independently each other, a methylene group or --O--; a, b, c, d and e represent, independently each other, 0 or 1.

    摘要翻译： 一种液晶混合物，其含有（a）至少一种式（1）化合物的化合物：其中R是C1-C12烷基等;其中R是C1-C12烷基; X1，X2，X3，X4，Y1，Y2，Y3和Y4彼此独立地表示CH，CF或N; A是氢原子，4-R1-（环烷基）基等，其中R 1是C 1 -C 12烷基等，p是0或1; 和（b）至少一种式（4）的化合物：其中环C，D，E和F各自独立地表示， 可以被1,2或3个氟原子取代的1,4-亚苯基等; R2是氢原子，C1-C12烷基等; R3是氢原子，氟原子，氟甲基等; Z1，Z2和Z3彼此独立地表示-COO-，-OCO-，-OCH2-，-CH2O-，C1-C5亚烷基，C2-C5亚烯基等; J和K彼此独立地表示亚甲基或-O-; a，b，c，d和e彼此独立地表示0或1。

    Process of producing 2-cyano-4-oxo-4H-benzopyran compounds
    8.
    发明授权
    Process of producing 2-cyano-4-oxo-4H-benzopyran compounds 失效
    制备2-氰基-4-氧代-4H-苯并吡喃化合物的方法

    公开(公告)号：US5659051A

    公开(公告)日：1997-08-19

    申请号：US273119

    申请日：1994-07-11

    申请人： Takayuki Higashii ,  Hideki Ushio ,  Yukari Fujimoto ,  Tsutomu Matsumoto ,  Masayoshi Minai ,  Katsuichi Yasunaga ,  Hiroshi Sogabe ,  Takahiro Kotera

    发明人： Takayuki Higashii ,  Hideki Ushio ,  Yukari Fujimoto ,  Tsutomu Matsumoto ,  Masayoshi Minai ,  Katsuichi Yasunaga ,  Hiroshi Sogabe ,  Takahiro Kotera

    IPC分类号： C07D311/24

    CPC分类号： C07D311/24

    摘要： There is disclosed a process of producing a 2-cyano-4-oxo-4H-benzopyran compound of the general formula (2): ##STR1## wherein R.sup.1 and R.sup.2 are independently hydrogen, halogen, hydroxy, C.sub.1 -C.sub.5 alkyl, C.sub.1 -C.sub.5 alkoxy, nitro or a group of the RCONH wherein R is C.sub.1 -C.sub.20 alkyl, phenyl, phenyl-substituted (C.sub.1 -C.sub.20) alkyl, phenyl (C.sub.1 -C.sub.20)alkoxyphenyl or (C.sub.1 -C.sub.20) alkoxyphenyl. This production process is characterized in that a carboxamide of the general formula (1): ##STR2## wherein R.sup.1 and R.sup.2 are each as defined above, is reacted with a dehydrating agent in the presence of a pyridine compound of the general formula (4): ##STR3## wherein A.sup.1 and A.sup.2 are independently hydrogen or C.sub.1 -C.sub.5 alkyl. If the final product cannot be obtained as crystals having good filtration properties by ordinary treatments, a novel technique as disclosed herein can provide such crystals by dissolving the reaction product in an organic solvent insoluble or slightly soluble in water; pouring the resultant solution into water; and removing the organic solvent by distillation with stirring to effect the crystallization of the final product.

    摘要翻译： 公开了通式（2）的2-氰基-4-氧代-4H-苯并吡喃化合物的制备方法：其中R 1和R 2独立地是氢，卤素，羟基，C 1 -C 5烷基 硝基或其中R为C 1 -C 20烷基，苯基，苯基取代的（C 1 -C 20）烷基，苯基（C 1 -C 20）烷氧基苯基或（C 1 -C 20）烷氧基苯基）的RCONH基团。 该制造方法的特征在于通式（1）的羧酰胺：其中R 1和R 2各自如上所定义，与脱水剂在通式（Ⅴ）的吡啶化合物存在下反应， （4）：其中A1和A2独立地为氢或C1-C5烷基。 如果通过常规处理不能获得具有良好过滤性能的结晶的最终产品，则本文公开的新技术可以通过将反应产物溶解在不溶或微溶于水的有机溶剂中来提供这种晶体; 将所得溶液倒入水中; 并在搅拌下通过蒸馏除去有机溶剂以实现最终产物的结晶。

    Liquid crystal, liquid crystal mixture having Tau-V min mode driving with negative or zero temperature dependency
    10.
    发明授权
    Liquid crystal, liquid crystal mixture having Tau-V min mode driving with negative or zero temperature dependency 失效
    具有Tau-V min模式驱动的液晶，液晶混合物具有负温度或零温度依赖性

    公开(公告)号：US06246452B1

    公开(公告)日：2001-06-12

    申请号：US08545198

    申请日：1995-10-19

    申请人： Chizu Sekine ,  Kyoko Yamamoto ,  Koichi Fujisawa ,  Yukari Fujimoto ,  Tsutomu Matsumoto ,  Masayoshi Minai

    发明人： Chizu Sekine ,  Kyoko Yamamoto ,  Koichi Fujisawa ,  Yukari Fujimoto ,  Tsutomu Matsumoto ,  Masayoshi Minai

    IPC分类号： G02F1133

    CPC分类号： C09K19/345 ,  C09K19/46

    摘要： A ferroelectric chiral smectic liquid crystal mixture comprising at least one compound of the formula (I): wherein R11 and R12 represent, independently each other, a C1-C20 alkyl, alkoxy or alkoxyalkyl group which may be substituted by at least one halogen atom and may have an unsaturated bond; A11, A12 and A13 represent, independently each other, a phenylene group which may be substituted by a fluorine atom, or the like; * indicates an asymmetric carbon atom; Z is a hydrogen atom or a fluorine atom; n is an integer of 0 to 10; r, s, t and u are each 0 or 1, provided that when u is 1, the compound (I) is a trans-olefin, and at least one compound of the formula (II): wherein R21 is a saturated or unsaturated C3-C20 alkyl group or a saturated or unsaturated C3-C20 alkoxyalkyl group; A21, A22 and A23 represent, independently each other, a phenylene group which may be substituted by a fluorine atom or the like; X2 is —C≡C— or the like; Z is a hydrogen atom or a fluorine atom; n is an integer of 1 to 10; m is 0 or 1; and * indicates an asymmetric carbon atom, which liquid crystal mixture has a high response speed and a small dependency of &tgr;-Vmin characteristic on temperature and a wide temperature driving margin.

    摘要翻译： 一种铁电手性近晶液晶混合物，其包含至少一种式（I）化合物：其中R 11和R 12彼此独立地表示可以被至少一个卤素原子取代的C 1 -C 20烷基，烷氧基或烷氧基烷基， 可具有不饱和键; A11，A12和A13彼此独立地表示可被氟原子取代的亚苯基等; *表示不对称碳原子; Z是氢原子或氟原子; n为0〜10的整数。 r，s，t和u各自为0或1，条件是当u为1时，化合物（I）为反式烯烃，和至少一种式（II）化合物：其中R 21为饱和或不饱和的 C3-C20烷基或饱和或不饱和C3-C20烷氧基烷基; A21，A22和A23彼此独立地表示可以被氟原子等取代的亚苯基; X 2是-C = C - 等; Z是氢原子或氟原子; n为1〜10的整数。 m为0或1; 和*表示不对称碳原子，该液晶混合物具有较高的响应速度，并且对于温度和宽温度驱动裕度具有较小的依赖性。