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    56.
    发明专利
    未知

    公开(公告)号：DE59006783D1

    公开(公告)日：1994-09-15

    申请号：DE59006783

    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.

    57.
    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.

    58.
    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.

    59.
    发明专利
    未知

    公开(公告)号：NO172985B

    公开(公告)日：1993-06-28

    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.

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