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    LCD orientation film contg. hexose polymer and macrocyclic modifier - of cryptand, coranand, podand, mercapto and/or ionophore type, esp. for use in ferroelectric LCD, giving good contrast and stability
    1.
    发明专利
    LCD orientation film contg. hexose polymer and macrocyclic modifier - of cryptand, coranand, podand, mercapto and/or ionophore type, esp. for use in ferroelectric LCD, giving good contrast and stability 未知

    公开(公告)号：DE4226556A1

    公开(公告)日：1994-02-17

    申请号：DE4226556

    申请日：1992-08-11

    Applicant: HOECHST AG

    Inventor： JUNGBAUER DIETMAR DR ,  ROESCH NORBERT DR ,  MANERO JAVIER DR

    IPC: C07D215/26 ,  C07D273/01 ,  C07D273/08 ,  C07D323/00 ,  C08B37/00 ,  C08L1/00 ,  C08L1/08 ,  G02F1/1337 ,  G02F1/141 ,  C09K19/56

    Abstract: LCD orientation film contains (a) oligo/polymer(s) of a 6-membered cyclic sugar unit, in which the free OH gps. may be (partly) converted to derivs., with equatorial substits. in ring positions, 2, 3 and 6; and (b) the macrocyclic cpd(s)., cryptand(s), coronand(s), podant(s), mercapto cpd(s). and/or ionophore(s). The prodn. of the orientation film and the LCD contg. this are also claimed. USE/ADVANTAGE - The film is used in ferroelectric LCDs (claimed). Covalent bonds are formed between components (a) and (b) and/or (b) is physically adsorbed on (a) (claimed). The LCDs have good contrast and light transmission values and very good liquid crystal (LC) orientation. They form very stable switches and displays. Uniform and twist-free (quasi)bookshelf orientation can be produced and LCDs damage by shock can be regenerated. In an example, (A) a clean ITO-coated glass plate was spin coated with a 0.25% aq. soln. of methylhydroxypropylcellulose (IV) and cured 60 min. at 120 deg. C. This was spin coated with a 0.5% soln. of (III) in 1,4-dioxane, cured 30 min. at 120 deg. C to form a chemical bond with (IV), cleaned to remove excess (III) and rubbed with a velvety cloth. PVA was used instead of (IV) for a control (B). When used in an LCD filled with a ferroelectric LC mixt., the effective tilt angle (chevron texture) was (A) 11, (B) 10.5 deg.; LC orientation (A) good to very good, (B) good; max. bias up to 50 micro-s pulse width (A) ca. 8, (b) ca. 7; and (A, B) there was no twist.

    2.
    发明专利
    未知

    公开(公告)号：DE4025236A1

    公开(公告)日：1992-02-13

    申请号：DE4025236

    申请日：1990-08-09

    Applicant: HOECHST AG

    Inventor： MAGERSTAEDT MICHAEL DR ,  ROESCH NORBERT DR ,  WINGEN RAINER DR

    IPC: C09K19/20 ,  C07C321/26 ,  C09K19/22 ,  C09K19/28 ,  C09K19/42 ,  C09K19/58 ,  G02F1/13

    Abstract: A liquid-crystalline mixture comprising at least two components, the first being an aromatic mercapto compound of the formula (I) (I) R1, R2, R3 and R4, independently of one another, are hydrogen, alkyl having 1 to 8 carbon atoms or alkoxy having 1 to 8 carbon atoms, -X- is -O-, -S- or -NH-, k and m, independently of one another, are 1, 2, or 3, and l is zero or 1, results in high contrasts in electrooptical switching and display devices.

    Ferroelectric liq. crystal mixts. - contain at least 2 components, at least one of which is a complex ligand for ions, esp. cations
    3.
    发明专利
    Ferroelectric liq. crystal mixts. - contain at least 2 components, at least one of which is a complex ligand for ions, esp. cations 未知

    公开(公告)号：DE4011803A1

    公开(公告)日：1991-10-17

    申请号：DE4011803

    申请日：1990-04-12

    Applicant: HOECHST AG

    Inventor： ESCHER CLAUS DR ,  HARADA TAKAMASA ,  ROESCH NORBERT DR ,  WINGEN RAINER DR

    IPC: C09K19/52 ,  C09K19/02 ,  C09K19/54 ,  C09K19/58 ,  G02F1/13

    Abstract: Ferroelectric liq. crystal mixts. (I) are claimed, consisting of at least 2 components, at least one of which is a complex ligand for ions (II). More specifically (II) are complex ligands for cations, pref. electrically neutral cpds. which complex cations and contain at least 2 N- and/or O- and/or P-donor centres; (II) are medium- or macro-cyclic cpds., namely cryptands, coronands, podands, bicyclic cpds. with at least 2 N atoms, or bicyclic or tricyclic cpds., pref. with at least 2 N atoms and at least 4 C atoms; (I) contains at least 2 different ligands (II), pref. at least one ligand for alkali and/or alkaline earth ions, esp. pref. at least 2 different complex ligands for different cations; (II) is a cpd. of formula (III) or (IV). In the formulae Z = O or S; m, n = integers above 0; m + n = 2-6; X1, X2 = Z, NR, -Z-(o-phenylene)-Z-, -Z-(1,2-cyclohexylene)-Z-, or X1 and X2 together = =N-CH2(CH2-Z-CH2)1-CH2-N=, =N-CO(CH2-Z-CH2)1-CO-N= or =CH-CH2(CH2ZCH2)2-CH2-CH= (with R = 1-15C alkyl or alkoxy, Ph, benzyl or -COPh; l = 1 or 2); R1-R4 = H, 1-12C alkyl, p-tolyl, Ph, -CH2-(p-phenylene)-COOH or benzyl; p, q, r, s = 2-4; p + q + r + s = 8-16; (I) contain 0.01-10 mol.% (II) and have spontaneous polarisation at least 35 nC/cm2.

    4.
    发明专利
    未知

    公开(公告)号：DE59104113D1

    公开(公告)日：1995-02-16

    申请号：DE59104113

    申请日：1991-04-10

    Applicant: HOECHST AG

    Inventor： HARADA TAKAMASA ,  ROESCH NORBERT DR ,  WINGEN RAINER DR

    IPC: C09K19/54 ,  C09K19/58 ,  G02F1/137

    Abstract: The occurrence of twist states in FLC displays can be suppressed by adding ionophores to FLC mixtures. Applicable ionophores are amides of the general formula I (I) wherein R1, R2, R3 and R4 e.g. are alkyl, cyclohexyl, phenyl or benzyl and X is alkylene with -CH2-groups being replaced by -O-, 1,2-phenylene or 1,2-cyclohexylene.

    9.
    发明专利
    未知

    公开(公告)号：DE4100893A1

    公开(公告)日：1992-07-16

    申请号：DE4100893

    申请日：1991-01-15

    Applicant: HOECHST AG

    Inventor： ROESCH NORBERT DR ,  WEGENER PETER DR ,  WINGEN RAINER DR

    IPC: C08G73/10 ,  G02F1/1337 ,  G02F1/141

    Abstract: An orientation layer for liquid crystal displays that contains at least one compound containing as structural element a mediocyclic or macrocyclic carbon ring allows a clearly improved contrast to be obtained in displays and the like. The mediocyclic or macrocyclic structural elements may also contain heteroatoms such as O, N and S atoms.

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