Liquid-crystalline mixtures, in particular ferroelectric
liquid-crystalline mixtures
    3.
    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
    4.
    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 - 。