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    • 6. 发明授权
    • Cyclohexyl- and cyclohexenyl-substituted liquid crystals with low birefringence
    • 具有低双折射率的环己基 - 和环己烯基取代的液晶
    • US06413448B1
    • 2002-07-02
    • US09299511
    • 1999-04-26
    • Michael WandWilliam ThurmesKundalika M. MoreXin-Hua Chen
    • Michael WandWilliam ThurmesKundalika M. MoreXin-Hua Chen
    • C09K1930
    • C09K19/3098C09K19/3066C09K19/3458
    • A liquid crystal composition comprising a host material and a low birefringence liquid crystal composition of the formula: R1—Ar—R2 wherein R1 and R2, independently of one another, are selected from the group consisting of internally branched alkyl groups having from 4 to 20 carbon atoms, terminally branched alkyl groups having from 3 to 20 carbon atoms, internally branched alkenyl groups having from 3 to 20 carbon atoms and terminally branched alkenyl groups having from 4 to 20 carbon atoms, wherein one or more —CH2— groups in R1 and R2 may be independently replaced with O, said R1 or R2, independently of one another, can be partially or fully halogenated, and wherein one or both of said R1 and R2 can be absent; Ar is a ring core moiety of the general formula: wherein Cyc is a cyclohexyl ring or a cyclohexenyl ring; RX is a phenyl ring which may be optionally substituted with one or more fluorines; RY is a cyclohexyl or cyclohexenyl ring; wherein x and y are 1 and z is 0; wherein A is COO; and B is selected from the group of small alkyl or alkenyl group having from 1 to 8 carbon atoms, COO and OCO; wherein a and b are 1 and d is zero.
    • 一种液晶组合物,其包含主体材料和下式的低双折射液晶组合物:其中R 1和R 2彼此独立地选自具有4至20个碳原子的内支链烷基,末端支链烷基 具有3至20个碳原子的基团,具有3至20个碳原子的内支链烯基和具有4至20个碳原子的末端支链烯基,其中R 1和R 2中的一个或多个-CH 2 - 基可以独立地被 O,所述R 1或R 2彼此独立地可以部分或完全卤化,并且其中所述R 1和R 2中的一个或两个可以不存在; Ar是通式的环核部分:其中Cyc是环己基环 或环己烯基环; RX是可任选被一个或多个氟取代的苯环; RY是环己基或环己烯基环;其中x和y是1,z是0;其中A是COO; 并且B选自具有1至8个碳原子的小烷基或烯基,COO和OCO;其中a和b是1,d是0。