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    12.
    发明专利
    未知

    公开(公告)号：DE3667274D1

    公开(公告)日：1990-01-11

    申请号：DE3667274

    申请日：1986-09-18

    Applicant: HOECHST AG

    Inventor： BAHR CHRISTIAN ,  HEPPKE GERD PROF DR ,  LOETZSCH DETLEF ,  OESTREICHER FEODOR DR

    IPC: C07C69/76 ,  C07C67/00 ,  C07C69/767 ,  C07C69/773 ,  C07C69/92 ,  C07C241/00 ,  C07C245/06 ,  C07C251/18 ,  C07C251/24 ,  C07C253/00 ,  C07C255/55 ,  C07C255/57 ,  C07C291/08 ,  C09K19/08 ,  C09K19/58 ,  G02F1/13

    Abstract: 1. An ester of a chiral alcohol and a mesogenic carboxylic acid, which is of the general formula (I) see diagramm : EP0217240,P6,F2 in which the symbols have the following meanings : n denotes 0 or 1, R**1 denotes a straight-chain or branched (C1 -C4 )alkyl which is substituted by halogen, in particular fluorine, R**2 denotes unsubstituted or substituted (C6 -C18 ) aryl, cyclo (C5 -C12 )alkyl or mononuclear or binuclear heteroaryl possessing a five-membered and/or sixmembered ring, and MC denotes R**3 -(A**1 -)n1 (B-)n2 (A**2 -)n3 CO where n = 0 or denotes OC-(A**1 -)n1 (B-)n2 (A**2 -)n3 CO where n = 1, R**3 denotes a straight-chain (C4 -C10 )alkyl in which a CH2 group can be replaced by an 0 atom, A**1 , A**2 independently of one another denote unsubstituted 1,4-phenylene or 1-4-cyclohexylene, B denotes CO-0 or 0-CO, n1 denotes 1 n2 denotes 0 or 1 and n3 denotes 1 or 2.

    Cpds. for improving properties of pref. ferroelectric LC mixts.
    14.
    发明专利
    Cpds. for improving properties of pref. ferroelectric LC mixts. 未知

    公开(公告)号：DE19627899A1

    公开(公告)日：1997-01-23

    申请号：DE19627899

    申请日：1996-07-11

    Applicant: HOECHST AG

    Inventor： HORNUNG BARBARA DIPL ING ,  WINGEN RAINER DR ,  MORR MICHAEL DR ,  LOETZSCH DETLEF DR ,  HEPPKE GERD PROF DR

    IPC: G02F1/13 ,  C07C69/773 ,  C07C69/92 ,  C07C69/94 ,  C07D239/26 ,  C07D239/34 ,  C07D285/12 ,  C07D303/02 ,  C07D307/10 ,  C09K19/20 ,  C09K19/34 ,  C09K19/58 ,  C07C69/90 ,  C07D405/12 ,  C07D417/12 ,  C09K19/08 ,  G09F9/35

    Abstract: Cpds. of formula (I) with multiple methyl branching are new: R (-A -M )a(-A -M )b(-A -M )c(-A )-G(C H(CH3)-CH2) n-R2 (I); A -A = 1,4-phenylene (opt. contg. one or more H atoms replaced by F, Cl and/or CN), pyrazine-2,5-diyl (opt. contg. 1-2H atoms replaced by Fl, Cl, and/or CN), pyridazine-3,6-diyl (opt. contg. 1-2H atoms replaced by Fl, Cl and/or CN), pyridine-2,5-diyl (opt. contg. one or more H atoms replaced by F, Cl and/or CN), pyrimidine-2,5-diyl (opt. contg. 1-2H atoms replaced by F, Cl and/or CN), trans-1,4-cyclohexylene (opt. contg. 1-2H atoms replaced by CN and/or CH3) (1,3,4)-thiazole-2,5-diyl, 1,3-dioxane-2,5-diyl, 1,3-dithiane-2,5-diyl, 1,3-thiazole-2,4-diyl (opt. contg. 1 H atom replaced by F, Cl and/or CN), 1,3-thiazole-2,5-diyl (opt. contg. 1 H atom replaced by F, Cl and/or CN), thiophene-2,4-diyl (opt. contg. 1 H atom replaced by F, Cl and/or CN), thiophene-2,5-diyl (opt. contg. 1-2 H atoms replaced by F, Cl and/or CN) or naphthalene-2,6-diyl(opt. contg. one or more H atoms replaced by F, Cl, and/or CN); C = chiral C atom; G = -CO-O-CH20, -CO-O-, -O-CO-, -O-CO-O-CH2-, -O-CO-O-, -O-CH2-, O, S or single bond; G' = -CO-O-, -CH2-O- or single bond; M - M = -CO-O-, -O-CO-, -O-CO-O-, -CH2-O-, -O-CH2-, -CH2-S-, -S-CH2-, -CH=CH- or single bond; R = optically active or racemic gp. of formula (1)-(9) H, CN, F, Cl, CF3, CHF2, CH2F, OCF3, OCHF2, 1-30C alkyl (opt. contg. one or more CH2 gps. replaced by O, S, -CO-O-, -O-CO-, -O-CO-O-, CO, CS, -CH=CH-1 or -C?=C - cyclopropane-1,2-diyl -Si(CH3)2-, 1,4-phenylene, trans-1,3-cyclohexylene or trans-1,3-cyclopentylene), with the provision that O and/or S atoms are not bonded to each other, and/or \- one H atoms in the alkyl gp. may be replaced by F, Cl, Br, -OR3, -SCN, -OCN or N3 R = 1-6C n-alkyl; R ,R ,R = H or 1-16C alkyl ,opt. contg. one or more CH2 gps. replaced by O and/or -CH=CH- with the provision that the O atoms are non-adjacent, and one or more H atoms in the alky gp. may be replaced by F or Cl; R ,R = R or they may be -(CH2)4- or -(CH2)5- when bonded to an oxirane, dioxolane or tetrahydrofuran system; a-c = 0-1; (a+b+c) = 1-3; and n = 2-6; Also claimed are (i) liq. crystals mixts. (LCM) contg. one or more cpds. (I) and (ii) switch and/or display devices comprising carrier plates, electrode, \- one polariser, \- one orientation layer and (LCM).

    15.
    发明专利
    未知

    公开(公告)号：DE59205336D1

    公开(公告)日：1996-03-28

    申请号：DE59205336

    申请日：1992-08-14

    Applicant: HOECHST AG

    Inventor： BOCK HARALD ,  HELFRICH WOLFGANG PROF DR ,  HEPPKE GERD PROF DR

    IPC: C09K19/02 ,  C09K19/32 ,  C09K19/34 ,  C09K19/42 ,  G02F1/13 ,  H01B3/30

    Abstract: The invention relates to an electro-optically switchable columnar liquid-crystalline system which is characterised in that the columns have ferroelectric transverse polarisation. In the columns of electro-optically switchable ferroelectric phases, the molecules are tilted or otherwise oriented to the long axes of the columns in such a way that the columns are ferroelectrically polarised. The ferroelectric polarisation is in a direction transverse to the column axis or has at least one transverse component. The polarisation direction need not be the same for all columns of a columnar phase. By applying an electrical field to the liquid crystal, the transverse polarisation of the columns is fully or partially reoriented. The liquid-crystalline system according to the invention can be used for the production of electro-optical switching and display devices (displays).

    16.
    发明专利
    未知

    公开(公告)号：ES2044869T3

    公开(公告)日：1994-01-16

    申请号：ES87108377

    申请日：1987-06-10

    Applicant: HOECHST AG

    Inventor： HEPPKE GERD PROF DR ,  SCHEROWSKY GUNTER PROF DR ,  BAHR CHRISTIAN ,  LEHMANN LUTZ

    IPC: C07C67/00 ,  C07C69/65 ,  C07C69/66 ,  C07C69/734 ,  C07C69/90 ,  C07C69/92 ,  C07C241/00 ,  C09K19/54 ,  C07C245/08 ,  C07C251/02 ,  C07C251/24 ,  C07C255/32 ,  C07C291/02 ,  C07C291/08 ,  C07D239/26 ,  C09K19/20 ,  C09K19/30 ,  C09K19/32 ,  C09K19/34 ,  C09K19/58 ,  G02F1/13

    Abstract: The novel compounds are chiral esters of alpha -substituted phenylalkanoic acids and mesogenic hydroxy compounds, the symbols in the general formula (I) (I) being defined as follows: MO=molecular radical of a mesogenic hydroxy compound MOH after removal of one H, the radical MO being expressed by the general formula (II) R2-(A1)n1-(B-)n2(A2)n3-O (II) where R2=straight-chain or branched (C1-C12)-alkyl, it being possible for one or two non-adjacent CH2 groups to be replaced by O and/or S atoms, or, if n1=1, also F, Cl, Br, CN or CF3, A1, A2=independently of one another 1,4-phenylene, diazine-2,5-diyl, diazine-3,6-diyl, 1,4-cyclohexylene, 1,3-dioxane-2,5-diyl, 1,3-dithiane-2,5-diyl or 1,4-bicyclo(2,2,2)octylene, it being possible for these groups also to be at least monosubstituted by F, Cl, Br, CN, CF3 and/or (C1-C12)-alkyl (one or two non-adjacent CH2 groups may be replaced by O and/or S atoms), B=CO-O, O-CO, CH2-CH2, OCH2, CH2O, CH=N, N=CH, N=N, N(O)=N, n1, n2, n3=independently of one another 0, 1 or 2, n1 and n3 not being 0 simultaneously, Y=an electron-attracting substituent, Z=H or an electron-attracting substituent, but not identical with Y, and R1=benzyl or phenyl, it being possible for these groups to be substituted in the aromatic moiety in the same way as A1 and A2, with the exception of the compounds with Z=H, Y=F, Cl or Br, R2=(C1-C11)-alkoxy, A1 and A2=phenyl, n1, and n3=1 and n2=0. The compounds are preferably used in tilted smectic liquid crystal phases, which are converted into ferroelectric liquid crystal phases by these compounds; they show high values of spontaneous polarization.

    19.
    发明专利
    未知

    公开(公告)号：DE3675136D1

    公开(公告)日：1990-11-29

    申请号：DE3675136

    申请日：1986-09-18

    Applicant: HOECHST AG

    Inventor： HEPPKE GERD PROF DR ,  LOETZSCH DETLEF ,  OESTREICHER FEODOR DR ,  SCHEROWSKY GUENTER PROF DR

    IPC: C07C69/76 ,  C07C69/773 ,  C07C69/92 ,  C09K19/58

    Abstract: The new esters derived from a chiral compound containing two OH groups and at least one mesogenic carboxylic acid which have the general formula (I) (I) in which X1=O-H or O-CO-(C1 to C12)alkyl and X2=O-MC or X1 and X2 denote O-MC independently of each other, where MC is the molecular radical of a mesogenic monocarboxylic acid after splitting off an OH group. The esters or esters substituted in the aromatic part of the phenolic part preferably find application as an admixture intwistable liquid crystal phases in which they produce a temperature compensation and a high degree of twisting.

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