中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

106 records (took 0.024 seconds)

    2.
    发明专利
    未知

    公开(公告)号：NO172985C

    公开(公告)日：1993-10-06

    申请号：NO892983

    申请日：1989-07-20

    Applicant: HOECHST AG

    Inventor： SCHEROWSKY GUENTER ,  GAY JUERGEN ,  WINGEN RAINER ,  DUEBAL HANS ROLF ,  ESCHER CLAUS ,  HEMMERLING WOLFGANG ,  INOGUSCHI YOSHIO ,  MUELLER INGRID ,  OHLENDORF DIETER

    IPC: G02F1/13 ,  C07D317/22 ,  C07D317/24 ,  C07D317/36 ,  C07D317/72 ,  C07D405/12 ,  C07D405/14 ,  C07D407/12 ,  C07D409/12 ,  C07D409/14 ,  C07D417/12 ,  C07D417/14 ,  C09K19/34 ,  C09K19/54 ,  C09K19/58 ,  G02F1/137 ,  G02F1/33 ,  C07D317/34

    Abstract: Optically active 1,3-dioxolane derivates of the general formula which carry a mesogenic radical in the 4-position are suitable as dopes in - in particular ferroelectric - liquid-crystal mixtures. The symbols in the general formula have the following meanings: R has a structure analogous to the moiety of the general formula on the right of X or is an alkyl or alkylene radical, which may be substituted, R , R and R are H or alkyl (R is alternatively alkenyl), which may also be substituted [R and R , together with the C(2) of the dioxolane ring, may alternatively be cycloaliphatic or keto groups], j, l and n are zero, 1 or 2, and k and m are zero or 1, with the proviso that n is zero if k is zero, m is zero if n is zero, and 1 , -A and -A are an aromatic, heterocyclic or aliphatic ring system, -M and -M are -CO-O, -O-CO, -CH2CH2, -CH=CH, -CH2O, -OCH2 or -C IDENTICAL C and X is O, S or O-CO-O. The particular advantage of the compounds of the general formula (I) is that they are able to induce a high twisting power in the cholesteric phase, but without significantly affecting the magnitude of the spontaneous polarisation already present in the mixture in the smectic C phase. They are therefore suitable for pitch compensation, in particular for ferroelectric liquid-crystal mixtures.

    4.
    发明专利
    未知

    公开(公告)号：NO170801C

    公开(公告)日：1992-12-09

    申请号：NO872266

    申请日：1987-05-29

    Applicant: HOECHST AG

    Inventor： HEPPKE GERD ,  BAHR CHRISTIAN ,  MUELLER INGRID ,  OHLENDORF DIETER ,  WINGEN RAINER

    IPC: C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C09K19/20 ,  C09K19/22 ,  C09K19/34 ,  C07D319/06 ,  C07D339/08 ,  C09K19/58 ,  G02F1/13 ,  G09F9/35

    Abstract: The novel compounds are chiral esters formed from alpha -substituted carboxylic acids and mesogenic hydroxyl compounds of the general formula (I) (I) in which the symbols have the following meaning: MO=molecular radical of a mesoganic hydroxyl compound MOH after removing an H, the radial MO being expressed by the general formula (II): R2-(A1)n1-(B-)(n2(A2)(n3-O(II) where the meaning of R2 is a straight-chain or branched (C1-C12)alkyl or alkenyl, it being possible for one or two nonadjacent CH2 groups to be replaced by O and/or S atoms, or if n1=1, also F, Cl, Br or CN, A1, A2 are, independently of each other, 1,4-phenylene, pyrimidine-2,5-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 said groups to be substituted at least singly by F, Cl, Br, CN and/or (C1-C12)alkyl (optionally, one or two nonadjacent CH2 groups are replaced by O and/or S atoms), B is CO-O, O-CO, CH2-CH2, OCH2, CH2O, CH=N, N=CH, N=N N(O)=N, n1, n2, n3 are, independently of each other, 0, 1 or 2, n1 and n3 not being simultaneously 0, Y is F, Cl, Br, CN or CF3, and R1 is branched, (C3-C9)alkyl, benzyl or phenyl, the compounds having R1=branched (C3-C7)alkyl, benzyl or phenyl, Y=F, Cl or Br, R2=(C1-C11)alkoxy, A1, A2= n1, n3=1 and n2=0 being excluded. The compounds preferably find application in tilted smectic liquid-crystalline phases which they transform into ferroelectric liquid-crystalline phases; they have high values of spontaneous polarization.

    5.
    发明专利
    未知

    公开(公告)号：NO170416C

    公开(公告)日：1992-10-14

    申请号：NO874177

    申请日：1987-10-05

    Applicant: HOECHST AG

    Inventor： HEMMERLING WOLFGANG ,  DUEBAL HANS-ROLF ,  MUELLER INGRID ,  OHLENDORF DIETER ,  WINGEN RAINER

    IPC: C07D405/12 ,  C07D409/12 ,  C09K19/34 ,  C09K19/58 ,  G02F1/13

    Abstract: 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), (I) the symbols have the following meaning: R1=straight-chain or branched (C1-C12) alkyl, where one or two non-neighboring CH2 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, and R2, R3 and R4, independently of one another=H, straight-chain (C1-C10) alkyl or branched (C3-C10) alkyl, where R2, R3 and R4 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.

Patent Agency Ranking