Liquid-crystalline mixtures, in particular ferroelectric
liquid-crystalline mixtures
    14.
    发明授权
    Liquid-crystalline mixtures, in particular ferroelectric liquid-crystalline mixtures 失效
    液体结晶混合物,特别是电磁液晶混合物

    公开(公告)号:US5071589A

    公开(公告)日:1991-12-10

    申请号:US245408

    申请日:1988-09-16

    摘要: The novel liquid-crystalline mixtures (in the case of ferroelectric behavior they additionally contain an optically active compound as dope) are constructed from at least 2 mixture components of the general formula (I): ##STR1## wherein n=6 to 14 and x=2 to 14. In addition, the mixtures may also contain cyclohexanecarboxylates of the general formula (II) ##STR2## where R.sup.1 =(C.sub.10 -C.sub.16) or (C.sub.8 -C.sub.14)alkoxy and R.sup.2 =(C.sub.2 -C.sub.9)alkyl, alkenyloxyphenylpyrimidine derivatives of the general formula (III) ##STR3## where R.sup.3 =(C.sub.7 -C.sub.16)alkyl or (C.sub.6 -C.sub.14)alkoxy and y=4-14, and/or alkoxyphenyl derivatives of alkylpyrimidine, of the general formula (IV) ##STR4## where m and p=6 to 14.

    摘要翻译: 新型液晶混合物(在铁电行为的情况下,另外含有作为掺杂剂的光学活性化合物)由至少2种通式(I)的混合物组分构成:其中n = 6〜 14和x = 2至14.另外,该混合物也可以含有通式(II)的环己烷羧酸酯,其中R1 =(C10-C16)或(C8-C14)烷氧基,R2 =(C2 -C 3)烷基,(C 3 -C 16)烷基或(C 6 -C 14)烷氧基和y = 4-14的通式(III)的烯氧基苯基嘧啶衍生物,和/或烷基嘧啶的烷氧基苯基衍生物 ,其中m和p = 6至14的通式(IV)的化合物(IV)。

    Liquid-crystal 5-phenylpyrimidine derivatives having sc or sc* phases
and a process for preparing them
    15.
    发明授权
    Liquid-crystal 5-phenylpyrimidine derivatives having sc or sc* phases and a process for preparing them 失效
    具有sc或sc *相的液晶5-苯基嘧啶衍生物及其制备方法

    公开(公告)号:US4906752A

    公开(公告)日:1990-03-06

    申请号:US378466

    申请日:1989-07-12

    摘要: Liquid-crystal 5-phenylpyrmidine derivatives having S.sub.c or S.sup.*.sub.c phases and a process for preparing them. The new liquid-crystal 5-phenylpyrimidine derivatives have an S.sub.c or S.sup.*.sub.c phase and are described by the general formula (I) ##STR1## in which the symbols have the following meaning: R.sup.1 and R.sup.2 denote identical or different, straight-chain or branched alkyl or alkenyl groups having from k to 16 carbon atoms, with or without an asymmetric carbon atom, in which one or more non-adjacent --CH.sub.2 -- groups can be replaced by --O-- and /or --S----A and --B each denote ##STR2## in which the radicals R.sup.1, R.sup.2, in each case, are situated at the phenylene part of --A, --B and m and n denote 0 or 1, but m and n do not simultaneously denote 1, with the following provisos:(a) if m=n=0, k is 8, and in R.sup.2 the --CH.sub.2 -- group adjacent to the phenyl nucleus is replaced by --O--;(b) if m=1 and n=0, k is 2, and(c) if m=0 and n=1, k is 2 and in R.sup.2 the --CH.sub.2 -- group adjacent to the phenyl nucleus is replaced by --O--.

    摘要翻译: 具有Sc或S * c相的液晶5-苯基嘧啶衍生物及其制备方法。 新的液晶5-苯基嘧啶衍生物具有Sc或S * c相,并由通式(I)表示,其中符号具有以下含义:R 1和R 2表示相同或不同的, 具有或不具有不对称碳原子的具有k至16个碳原子的直链或支链烷基或链烯基,其中一个或多个不相邻的-CH 2 - 基团可被-O-和/或-S- -A和-B各自表示 ,其中每种情况下,基团R 1,R 2位于-A,-B和m的亚苯基部分,m和n表示0或1,但m和n 不同时表示1,具有以下条件:(a)如果m = n = 0,k为8,在R2中,与苯基相邻的-CH 2 - 基团被-O-取代; (b)如果m = 1且n = 0,则k为2,(c)如果m = 0且n = 1,则k为2,在R2中,与苯基相邻的-CH 2 - 基团被-O - 。

    Chiral aryl-2,3-epoxyalkyl-ethers and the corresponding thio compounds
thereof, and the use thereof as dopes in liquid-crystal phases
    20.
    发明授权
    Chiral aryl-2,3-epoxyalkyl-ethers and the corresponding thio compounds thereof, and the use thereof as dopes in liquid-crystal phases 失效
    手性芳基-2,3-环氧烷基醚及其相应的硫代化合物及其作为液晶相中的掺杂物的用途

    公开(公告)号:US4876028A

    公开(公告)日:1989-10-24

    申请号:US104350

    申请日:1987-10-02

    摘要: The novel compounds are aryl-2,3-epoxyalkyl ethers or thioethers or the corresponding thiirane compounds having a mesogenic aromatic component and a chiral component having a three-membered heterocyclic ring, wherein, in the general formula (1), ##STR1## the symbols have the following meaning: R.sup.1 =straight-chain or branched (C.sub.1 -C.sub.12) alkyl, where one or two non-neighboring CH.sub.2 groups may be replaced by O or S atoms.A=diazine-2,5-diyl or diazine-3,6-diyl,X and Y=O and/or S, andR.sup.2, R.sup.3 and R.sup.4, independently of one another=H, straight-chain (C.sub.1 -C.sub.10) alkyl or branched (C.sub.3 -C.sub.10) alkyl, where R.sup.2, R.sup.3 and R.sup.4 are not simultaneously H.The compounds are preferably employed in tilted smectic liquid-crystal phases which they convert into ferroelectric liquid-crystal phases; they have high values for spontaneous polarization or they induce high values for spontaneous polarization.

    摘要翻译: 新化合物是芳基-2,3-环氧烷基醚或硫醚或具有介晶芳族组分的相应的硫杂环丁烷化合物和具有三元杂环的手性组分,其中在通式(1)中,( I)符号具有以下含义:R1 =直链或支链(C1-C12)烷基,其中一个或两个不相邻的CH 2基团可以被O或S原子替代。 A =二嗪-2,5-二基或二嗪-3,6-二基,X和Y = O和/或S,R2,R3和R4彼此独立地为H,直链(C1-C10) 烷基或支链(C 3 -C 10)烷基,其中R 2,R 3和R 4不同时为H.这些化合物优选用于倾斜的近晶相液晶相,它们转变成铁电液晶相; 它们对于自发极化具有高的值,或者它们引起自发极化的高值。