Liquid crystalline ester compounds and mixtures thereof
    36.
    发明授权
    Liquid crystalline ester compounds and mixtures thereof 失效
    液晶酯化合物及其混合物

    公开(公告)号:US4834907A

    公开(公告)日:1989-05-30

    申请号:US4815

    申请日:1987-01-08

    摘要: Novel chiral smectic liquid crystalline ester compounds having a superior stability and exhibiting a high response rate when used in the form of display elements and chiral smectic mixtures containing at least one of these compounds are provided, which compounds are expressed by the formula ##STR1## wherein n is an integer of 2 to 16; l is 0, 1 or 2; m is 1 or 2 under the condition of l+m.gtoreq.2; X represents methylene group --CH.sub.2 -- or single bond when l is zero, methylene group --CH.sub.2 -- or ether linkage --O-- when l=1 or ether linkage --O-- when l=2; and Y represents R, OR, --COR, --OCOR, --OCOOR or --COOR wherein R throughout represents an alkyl group of 1 to 18 carbon atoms; and asterisk * shows an optically active carbon atom.

    摘要翻译: 提供了具有优异稳定性并以显示元件形式使用并且含有至少一种这些化合物的手性近晶混合物时具有高响应率的新型手性近晶液晶酯化合物,该化合物由下式表示:其中 n为2〜16的整数。 l为0,1或2; 在l + m> / = 2的条件下,m为1或2; 当l = 1时,X表示亚甲基-CH 2 - 或单键,当l = 1时为亚甲基-CH 2 - 或醚键-O-,当l = 2时,表示醚键-O-; 并且Y表示R,OR,-COR,-OCOR,-OCOOR或-COOR,其中R全部表示1至18个碳原子的烷基; 星号*表示光学活性碳原子。

    2,5-diphenylpyrimidine compound
    40.
    发明授权
    2,5-diphenylpyrimidine compound 失效
    2,5-二苯基嘧啶化合物

    公开(公告)号:US5100578A

    公开(公告)日:1992-03-31

    申请号:US426227

    申请日:1989-10-25

    摘要: An optically active compound having a large spontaneous polarization ps value (ps) particularly for realizing a high speed response, and a liquid crystal composition are provided, which compound is an optically active 2,5-diphenylpyrimidine compound expressed by the formula ##STR1## wherein R.sup.1 is 1-20C alkyl or alkoxy, R.sup.2 is 1-20C alkyl, A is ##STR2## and * indicates an asymmetric carbon atom.

    摘要翻译: 提供特别用于实现高速响应的具有大的自发极化ps值(ps)的光学活性化合物和液晶组合物,该化合物是由式(IMAGE)表示的光学活性的2,5-二苯基嘧啶化合物 I)其中R1为1-20C烷基或烷氧基,R2为1-20C烷基,A为“IMA”,*为不对称碳原子。