公开(公告)号：ES2019077B3

公开(公告)日：1991-06-01

申请号：ES87107658

申请日：1987-05-26

Applicant: HOECHST AG

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

IPC: C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C09K19/20 ,  C09K19/22 ,  C09K19/34

公开(公告)号：CA2049960A1

公开(公告)日：1990-09-23

申请号：CA2049960

申请日：1990-03-21

Applicant: HOECHST AG

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

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

Abstract: - 35 - HOE 89/F 096 Ferroelectric liquid crystalline mixtures The novel ferroelectric liquid-crystalline mixtures are based on at least two mixture components of the general formula (I) (I) but additionally contain at least one optically active dope from one or more of the following groups a) optically active esters of tetrahydrofuran-2- carboxylic acid b) optically active aryl 2,3-epoxyalkyl esthers c) optically active 1,3-dioxolan-4-yl ethers. The ferroelectric LC mixtures have a high spontaneous polarization and facilitate substantial compensation of the pitch of the helix in a nematic phase.

公开(公告)号：PT96647A

公开(公告)日：1991-10-31

申请号：PT9664791

申请日：1991-02-01

Applicant: HOECHST AG

Inventor： ILLIAN GERHARD ,  MULLER INGRID ,  HARADA TAKAMARA

IPC: C07C13/16 ,  C07C69/86 ,  C07C15/02 ,  C07C43/20 ,  C07C69/92 ,  C07C69/94 ,  C07C69/96 ,  C07D20060101 ,  C07D213/30 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C07D285/12 ,  C07D405/12 ,  C07D417/12 ,  C07F7/08 ,  C09K19/08 ,  C09K19/20 ,  C09K19/34 ,  C09K19/42 ,  C09K19/46 ,  G02F1/13 ,  C09K19/00

Abstract: PCT No. PCT/EP91/00129 Sec. 371 Date Jul. 24, 1992 Sec. 102(e) Date Jul. 24, 1992 PCT Filed Jan. 24, 1991 PCT Pub. No. WO91/11441 PCT Pub. Date Aug. 8, 1991.Geminal dimethylalkyl compounds, process for their preparation and their use in liquid-crystalline mixtures Geminal dimethylalkyl compounds of the formula (I) (I) in which: R1 is, for example, straight-chain or branched (with or without an asymmetric carbon atom) alkyl or alkenyl having 2 to 16 carbon atoms, A1, A2 and A3 are, for example, identical or different 1,4-phenylene, 1,4-cyclohexylene or pyrimidine-2,5-diyl, M1 and M2 are, for example, identical or different CO-O or O-CO, G is for example, identical or different straight-chain or branched alkylene having 1 to 16 carbon atoms, k, l, m and n are zero or 1, and R6 is straight-cain alkyl having 1 to 10 carbon atoms, can advantageously be employed in liquid-crystalline mixtures. In liquid-crystalline mixtures, said compounds result in a melting point depression, in a shift in the temperature limit of the Sc phase in ferroelectric mixtures and in other improvements of important electrooptical characteristic values.

公开(公告)号：ES2019425B3

公开(公告)日：1991-06-16

申请号：ES88105777

申请日：1988-04-12

Applicant: HOECHST AG

Inventor： WINGEN RAINER ,  DUBAL HANS-ROLF ,  ESCHER CLAUS ,  HEMMERLING WOLFGANG ,  MULLER INGRID ,  OHLENDORF DIETER

IPC: C07D317/24 ,  C07D317/32 ,  C07D317/72 ,  C07D405/12 ,  C07D407/12 ,  C07D409/12 ,  C09K19/02 ,  C09K19/34 ,  C09K19/54 ,  C09K19/58 ,  G02F1/133 ,  G02F1/137 ,  G02F1/141

公开(公告)号：CA2049314A1

公开(公告)日：1990-09-23

申请号：CA2049314

申请日：1990-03-21

Applicant: HOECHST AG

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

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

Abstract: - 45 - HOE 89/F 095 Liquid-crystalline mixtures in particular ferroelectric liquid-crystalline mixtures 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 formulae ¢sic! (II), (III) or (IV). (I) (II) X = O or a single bond (III) (IV) The mixtures have favorable properties for use in electrooptical display elements, such as high contrast, low melting point and short switching times.

公开(公告)号：CA2049008A1

公开(公告)日：1990-09-10

申请号：CA2049008

申请日：1990-03-07

Applicant: HOECHST AG

Inventor： MULLER INGRID ,  DUBAL 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 ,  C07F7/10 ,  C07D417/12 ,  C07D405/14

Abstract: HOE 89/F 080 of the disclosure Optically active dioxolanylacrylates and dioxolanylpropionates carrying a mesogenic radical, a process for their preparation, and their use as dopes in liquidcrystal mixtures. Optically active 1,3-dioxolane derivatives, carrying a mesogenic radical, of the general formula (I) (I) are suitable as dopes in - in particular ferroelectric liquid-crystal mixtures. The symbols in the general formula have the following meaning here: R1 is constructed analogously to the moiety of the general formula on the right of X or is an alkyl or alkylene ¢sic! radical which may be substituted, R2, R3 and R4 are H or alkyl (R4 is alternatively alkenyl), which may also be substituted ¢R2 and R3, together with the C(2) of the dioxolane ring, are a cycloaliphatic radical or a keto group!, j, l and n are zero, 1 or 2, and k and m are zero or 1, with the proviso that n = zero if k = zero, m = zero if n = zero, and 1 ? j + 1 + n ? 3, -A1, -A2 and -A3 are an aromatic, heterocyclic or aliphatic ring system, -M1 and -M2 are -CO-O, -O-CO, -CH2CH2, -CH=CH, -CH2O, -OCH2 or -C=C, and X is CH=CH or CH2-CH2. The particular advantage of the compounds of the general formula (I) is that they are able to induce a high twisting power in a cholesteric phase, but without significantly affecting, in the smectic C* phase, the magnitude of the spontaneous polarization already present in a mixture. They are therefore suitable for pitch compensation, in particular for ferroelectric liquidcrystal mixtures.

公开(公告)号：NO884136D0

公开(公告)日：1988-09-16

申请号：NO884136

申请日：1988-09-16

Applicant: HOECHST AG

Inventor： WINGEN RAINER ,  DUBAL HANS-ROLF ,  ESCHER CLAUS ,  HEMMERLING WOLFGANG ,  MULLER INGRID ,  OHLENDOF DIETER

IPC: C07D239/26 ,  C07D239/34 ,  C09K19/34 ,  C09K19/46 ,  G02F1/137 ,  G02F1/141 ,  C07D239/00 ,  G02F1/13

Abstract: Phenylpyrimidinyl trans-cyclohexanecarboxylates of the formula … … form, in addition to a relatively broad nematic phase, a smectic C phase if R denotes an alkyl radical having 10 to 16 carbon atoms, in particular 11 to 16 carbon atoms, or an alkyloxy radical having 8 to 14 carbon atoms and R denotes an alkyl radical having 2 to 9 carbon atoms. Accordingly, they are suitable in particular as components of liquid-crystalline mixtures having a smectic C phase, since they induce a relatively broad nematic phase or widen a narrow nematic phase present and enlarge the temperature range of the smectic C phase towards low, but in particular towards high temperatures.