Nematic liquid crystals of 5-cyano-2-[4-acyloxyphenyl]-pyrimidines and
mixtures containing the same
    2.
    发明授权
    Nematic liquid crystals of 5-cyano-2-[4-acyloxyphenyl]-pyrimidines and mixtures containing the same 失效
    5-氰基-2- [4-酰氧基苯基] - 嘧啶的向列型液晶及含有它们的混合物

    公开(公告)号:US4358393A

    公开(公告)日:1982-11-09

    申请号:US145060

    申请日:1980-04-30

    CPC分类号: C07D239/28 C09K19/3469

    摘要: Nematic liquid crystals are employed in electro-optical devices for the modulation of the transmittant or incident light and for the black and white or colored rendition of numerals, symbols and pictures.The object of the invention is the use of nematic liquid crystals having a high positive dielectric anisotropy, a low threshold and operating voltage and high clear points and a process for making these compounds.It was found that as liquid crystals for electro-optical devices mixtures are useful which, as an essential component, contain one or several compounds from the class of 5-cyano-2-[4-acyloxyphenyl]-pyrimidines of the formula ##STR1## wherein R.sup.1 is ##STR2## C.sub.5 H.sub.11 -- or C.sub.n H.sub.2n+1 O-- R.sup.2 is C.sub.n H.sub.2n+1 ; C.sub.n H.sub.2n+1 O; C.sub.n H.sub.2n+1 S; F; Cl; Br; CF.sub.3 ; C.sub.n H.sub.2n+1 COO; C.sub.n H.sub.2n+1 OCOO; CN; NO.sub.2 ; C.sub.n H.sub.2n+1 NH; or C.sub.n H.sub.2n+1 (CH.sub.3)N, n is 1 to 10, andR.sup.3 is C.sub.n H.sub.2n+1,n is 1 to 10.

    摘要翻译: 向列液晶用于电光装置中用于调制透射体或入射光以及数字,符号和图像的黑白或彩色再现。 本发明的目的是使用具有高正介电各向异性,低阈值和操作电压以及高清晰度的向列液晶以及制备这些化合物的方法。 已经发现,作为电光器件混合物的液晶是有用的,其作为必要组分含有一种或几种下式的5-氰基-2- [4-酰氧基苯基] - 嘧啶类化合物, 其中R1是C5H11-或CnH2n + 10- R2是CnH2n + 1; CnH2n + 10 CnH2n + 1S; F; Cl; Br; CF3; CnH2n + 1COO; CnH2n + 1OCOO; CN; NO2; CnH2n + 1NH; 或C n H 2n + 1(CH 3)N,n为1〜10,R 3为C n H 2n + 1,n为1〜10。

    Liquid crystalline substances
    7.
    发明授权
    Liquid crystalline substances 失效
    液晶物质

    公开(公告)号:US4668426A

    公开(公告)日:1987-05-26

    申请号:US717419

    申请日:1985-03-29

    摘要: Nematic liquid crystalline substances as additives in mixtures for electro-optical systems for the rendition of numbers, symbols and images. The additives provide new liquid crystalline substances of broad mesophase ranges which improve the chemical stability of the substance mixtures. It has been found that liquid crystalline 5-alkyl-pyridine-2-carboxylic acid esters of the general formula ##STR1## are suitable for utilization in mixtures for electro-optical displays for the rendition of numbers, symbols and images.

    摘要翻译: 向列液晶物质作为电子光学系统的混合物中的添加剂,用于数字,符号和图像的再现。 这些添加剂提供了广泛的中间相范围的新的液晶物质,可改善物质混合物的化学稳定性。 已经发现,具有通式为:图像的液晶5-烷基 - 吡啶-2-羧酸酯,R1 = OCnH2n + 1,CN ,C n H 2n + 1其中m,n = 1至8适用于电光显示器用于再现数字,符号和图像的混合物中。

    Mixing component for liquid crystal substances
    8.
    发明授权
    Mixing component for liquid crystal substances 失效
    液晶物质的混合组分

    公开(公告)号:US4615824A

    公开(公告)日:1986-10-07

    申请号:US675672

    申请日:1984-11-28

    摘要: A mixing component for nematic liquid-crystalline substances used in optoelectronic components for the rendition of numbers, symbols and images. The object of the invention is to reduce, in components for nematic liquid crystal substances, the threshold and operating voltages. It has been found, that the addition of one or more 1-oxa-2,6,7-trioxane-1-phospha-bicyclo-derivatives having the general formula ##STR1## wherein ##STR2## with R.sup.1 =C.sub.n H.sub.2n+1 --, C.sub.n H.sub.2n+1 O--, C.sub.n H.sub.2n+1 COO--, C.sub.n H.sub.2n+1 OCOO--, R.sup.2 +C.sub.n H.sub.2n=1 --with n=an integer from 1 to 10to nematic liquid crystal substances, considerably reduces the operating voltage.

    摘要翻译: 用于光电元件的向列型液晶物质的混合组分用于数字,符号和图像的再现。 本发明的目的是在向列型液晶物质的组分中降低阈值和工作电压。 已经发现,加入一种或多种具有通式的1-氧杂-2,6,7-三恶烷-1-膦 - 双环衍生物,其中 + TR ,其中R1 = CnH2n + 1-,CnH2n + 10-,CnH2n + 1COO-,CnH2n + 1OCOO-,R2 + CnH2n = 1-,其中n = 1至10的整数向向列型液晶物质, 大大降低了工作电压。

    Nematic liquid crystal mixtures
    10.
    发明授权
    Nematic liquid crystal mixtures 失效
    向列型液晶混合物

    公开(公告)号:US4348298A

    公开(公告)日:1982-09-07

    申请号:US136036

    申请日:1980-03-31

    CPC分类号: C09K19/60

    摘要: A nematic liquid crystal mixture for modulation of the transmitted or incident light and for rendition of colored numerals, symbols and images in electro-optical devices, the said mixture comprising(a) a nematic liquid crystal adapted for reorientation in an electrical field due to its dielectric anisotropy and(b) a dichroic dyestuff adapted for simultaneous orientation changes together with the said nematic liquid crystal between a light absorption and a light transmission position based on the guest-host effect, the said dyestuff being an s-tetrazine derivative having an elongate molecular structure and having the formula ##STR1## wherein X is ##STR2## R.sup.1 and Y is R.sup.2 -- or ##STR3## R.sup.1 being H--, F--, Cl--, Br--, J--, O.sub.2 N--, NC--, HO--, H.sub.2 N--, C.sub.n H.sub.2n+1 NH--, C.sub.n H.sub.2n+1 (CH.sub.3)N--, C.sub.n H.sub.2n+1" --, C.sub.n H.sub.2n+1 O--, C.sub.n H.sub.2n+1 S--, C.sub.n H.sub.2n+1 COS--, C.sub.n H.sub.2n+1 COO--, C.sub.n H.sub.2n+1 OOC--, C.sub.n H.sub.2n+1 CO-- or C.sub.n H.sub.2n+1 OCOO--, andR.sup.2 being H--, F--, Cl--, Br--, J--, O.sub.2 N--, NC--, HO--, H.sub.2 N--, C.sub.n H.sub.2n+1 NH--, C.sub.n H.sub.2n+1 (CH.sub.3)N--, C.sub.n H.sub.2n+1 --, C.sub.n H.sub.2n+1 O--, C.sub.n H.sub.2n+1 S--, C.sub.n H.sub.2n+1 COS--, C.sub.n H.sub.2n+1 COO--, C.sub.n H.sub.2n+1 OOC--, C.sub.n H.sub.2n+1 CO-- or C.sub.n H.sub.2n+1 OCOO--, andR.sup.3 being H--, F--, Cl--, Br--, J--, CH.sub.3 -- or CF.sub.3 --, andR.sup.4 being H--, F--, Cl--, Br--, J--, CH.sub.3 --, or CF.sub.3 --,n is a positive integer.

    摘要翻译: 一种向列型液晶混合物,用于调制透光或入射光,并用于在电光装置中再现有色数字,符号和图像,所述混合物包括(a)适于由于其电场而在电场中重新取向的向列型液晶 介电各向异性和(b)适于与所述向列型液晶同时取向改变的二色性染料在基于客体主效应的光吸收和透光位置之间,所述染料是具有细长的四 分子结构并具有下式的化合物,其中X为R 1,Y为R 2,或者R 1为H,F-,Cl-,Br-,J-,O 2 N-,NC-,HO- ,CnH2n + 1NH-,CnH2n + 1(CH3)N,CnH2n + 1“,CnH2n + 10,CnH2n + 1S-,CnH2n + 1COS-,CnH2n + 1COO-,CnH2n + CnH2n + 1CO-或CnH2n + 1OCOO-,R2为H,F-,Cl-,Br-,J-,O2N-,NC-,HO-,H2N-,CnH2n + 1NH-,CnH2n + )N,C n H 2n + 1,C n H 2n + 10,C n H 2n + 1S-,C n H 2n + ,CnH2n + 1COO-,CnH2n + 10OC-,CnH2n + 1CO-或CnH2n + 10COOO-,R3为H,F-,Cl-,Br-,J-,CH3-或CF3-,R4为H- ,F-,Cl-,Br-,J-,CH 3 - 或CF 3 - ,n是正整数。