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    81.
    发明专利
    未知

    公开(公告)号：AT109778T

    公开(公告)日：1994-08-15

    申请号：AT90904314

    申请日：1990-03-07

    Applicant: HOECHST AG

    Inventor： MUELLER INGRID ,  DUEBAL HANS-ROLF ,  ESCHER KLAUS ,  HEMMERLING WOLFGANG ,  ILLIAN GERHARD ,  MURAKAMI MIKIO ,  OHLENDORF DIETER ,  WINGEN RAINER

    IPC: G02F1/13 ,  C07D317/30 ,  C07D317/72 ,  C07D405/12 ,  C07D409/12 ,  C09K19/06 ,  C09K19/34 ,  C09K19/58

    Abstract: Optically active 1,3 dioxolane derivatives containing a mesogenic residue, of the general formula (I), are suitable as doping agents especially in ferro-electrical liquid crystal mixtures. The meanings of the symbols in the general formula are: R?1 is constructed similarly to the part of the general formula to the right of X or an alkyl or alkylene residue which may be substituted; R?2, R?3, R?4 = H or alkyl (R?4 may also be alkenyl) which may also be substituted [R?2, R?3 together with the C(2) of the dioxolane ring may be a cycloaliphate or a keto group]; j, l, n = zero, 1 or 2 and k, m = zero or 1 provided that if k = zero, n = zero also, if n = zero, m = zero also and l j + l + n 3; -A?1, -A?2, -A?3 = aromatic, heterocyclic or aliphatic ring system; -M?1,- M?2 = -CO-O, -O-CO, -CH2?CH2?, -CH=CH, -CH2?O, -OCH2?, -C=C and X = CH=CH, CH2?-CH2?. The special advantage of the compounds with the general formula (I) is that they can induce a high twisting capacity in a cholesteric phase without substantially affecting in the smectic C* phase the value of the spontaneous polarisation already in the mixture. They are therefore suitable for pitch compensation, especially for ferro-electrical liquid crystal mixtures.

    82.
    发明专利
    未知

    公开(公告)号：AT107345T

    公开(公告)日：1994-07-15

    申请号：AT90904815

    申请日：1990-03-21

    Applicant: HOECHST AG

    Inventor： DUEBAL HANS-ROLF ,  ESCHER CLAUS ,  HARADA TAKAMASA ,  HEMMERLING WOLFGANG ,  ILLIAN GERHARD ,  MUELLER INGRID ,  MURAKAMI MIKIO ,  OHLENDORF DIETER ,  WINGEN RAINER

    IPC: G02F1/13 ,  C09K19/34 ,  C09K19/42 ,  C09K19/46 ,  C09K19/58

    Abstract: PCT No. PCT/EP90/00458 Sec. 371 Date Nov. 6, 1991 Sec. 102(e) Date Nov. 6, 1991 PCT Filed Mar. 21, 1990 PCT Pub. No. WO90/11336 PCT Pub. Date Oct. 4, 1990.The novel liquid-crystalline mixtures (in the case of ferroelectric behavior they additionally contain an optically active compound as dope) are based on at least two mixture components of the general formula (I) and at least one carboxylate of the general formula (II), (III) or (IV). (* CHEMICAL STRUCTURE *) (I) (* CHEMICAL STRUCTURE *) (II) X = O or a single bond (* CHEMICAL STRUCTURE *) (III) (* CHEMICAL STRUCTURE *) (IV) The mixtures have favorable properties for use in electrooptical display elements, such as high contrast, low melting point and short switching times.

    83.
    发明专利
    未知

    公开(公告)号：DE58907760D1

    公开(公告)日：1994-07-07

    申请号：DE58907760

    申请日：1989-09-19

    Applicant: HOECHST AG

    Inventor： MUELLER INGRID DR ,  DUEBAL HANS-ROLF DR ,  ESCHER CLAUS DR ,  HEMMERLING WOLFGANG DR ,  ILLIAN GERHARD DR ,  MURAKAMI MIKIO ,  OHLENDORF DIETER DR ,  WINGEN RAINER DR

    IPC: G02F1/13 ,  C07D317/24 ,  C07D317/30 ,  C07D317/32 ,  C07D405/12 ,  C07D405/14 ,  C09K19/34 ,  C09K19/54 ,  G09F9/35

    Abstract: Novel optically active esters of 5-ethyl- and 5-vinyl-1,3- dioxolane-4-carboxylic acid, their use as dopes in liquid-crystal mixtures, and liquid-crystal mixtures containing the novel esters. Optically active 1,3-dioxolanyl derivatives of the general formula (I) are suitable as dopes in liquid-crystal mixtures. The symbols in the general formula have the following meanings: R has an analogous structure to the moiety on the right of X in the general formula or is an alkyl or alkylene radical, which may be substituted, R and R are H or alkyl, which may also be substituted [R and R are alternatively, together with the C(2) of the dioxolane ring, a cycloaliphatic radical] R is vinyl or ethyl, with the proviso that at least one radical R is vinyl or ethyl if R is analogous to the moiety on the right of X in the formula (I), -A , -A and -A are aromatic, heterocyclic or aliphatic ring systems, -M and -M are -CO-O, -O-CO, -CH2CH2, -CH=CH, -CH2O,-OCH2 or -C=C, and X is O, S or O-CO-O. The particular advantage of the compound of the general formula (I) is that it is able to induce high twisting power in a cholesteric phase.

    84.
    发明专利
    未知

    公开(公告)号：AT106402T

    公开(公告)日：1994-06-15

    申请号：AT89117265

    申请日：1989-09-19

    Applicant: HOECHST AG

    Inventor： MUELLER INGRID DR ,  DUEBAL HANS-ROLF DR ,  ESCHER CLAUS DR ,  HEMMERLING WOLFGANG DR ,  ILLIAN GERHARD DR ,  MURAKAMI MIKIO ,  OHLENDORF DIETER DR ,  WINGEN RAINER DR

    IPC: G02F1/13 ,  C07D317/24 ,  C07D317/30 ,  C07D317/32 ,  C07D405/12 ,  C07D405/14 ,  C09K19/34 ,  C09K19/54 ,  G09F9/35

    Abstract: Novel optically active esters of 5-ethyl- and 5-vinyl-1,3- dioxolane-4-carboxylic acid, their use as dopes in liquid-crystal mixtures, and liquid-crystal mixtures containing the novel esters. Optically active 1,3-dioxolanyl derivatives of the general formula (I) are suitable as dopes in liquid-crystal mixtures. The symbols in the general formula have the following meanings: R has an analogous structure to the moiety on the right of X in the general formula or is an alkyl or alkylene radical, which may be substituted, R and R are H or alkyl, which may also be substituted [R and R are alternatively, together with the C(2) of the dioxolane ring, a cycloaliphatic radical] R is vinyl or ethyl, with the proviso that at least one radical R is vinyl or ethyl if R is analogous to the moiety on the right of X in the formula (I), -A , -A and -A are aromatic, heterocyclic or aliphatic ring systems, -M and -M are -CO-O, -O-CO, -CH2CH2, -CH=CH, -CH2O,-OCH2 or -C=C, and X is O, S or O-CO-O. The particular advantage of the compound of the general formula (I) is that it is able to induce high twisting power in a cholesteric phase.

    90.
    发明专利
    未知

    公开(公告)号：DE3938209A1

    公开(公告)日：1991-05-23

    申请号：DE3938209

    申请日：1989-11-17

    Applicant: HOECHST AG

    Inventor： DUEBAL HANS-ROLF DR ,  MURAKAMI MIKIO ,  HERRMANN-SCHOENHERR OTTO DR ,  SCHNELLER ARNOLD DR

    IPC: C08G69/32 ,  G02F1/1337

    Abstract: The invention relates to the use of substituted aromatic polyamides as the orientation layer for liquid crystal switching and display devices. The polyamides contain structural units of formula (I), where the symbols have the following meaning: -X- = (a), (b), (c), -Y- = (d), where R and R are the same or different and stand for perfluorinated alkyl with 1 to 4 carbon atoms, R and R are the same or different and stand for H or CF3, and -W- stands for -O-, -C(CH3)2-, -C(CF3)2, for example. Orientation layers made from these polyamides cure at low temperatures, possess good adhesive strength and high transparency and permit a large surface tilt.

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