公开(公告)号：AT89029T

公开(公告)日：1993-05-15

申请号：AT88108381

申请日：1988-05-26

Applicant: HOECHST AG

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

IPC: C07D301/30 ,  C07D303/48 ,  C07D405/06 ,  C07D405/12 ,  C07D407/12 ,  C07D409/12 ,  C09K19/58 ,  G02F1/139 ,  G02F1/361 ,  G02F1/37

公开(公告)号：DE58902753D1

公开(公告)日：1992-12-24

申请号：DE58902753

申请日：1989-08-08

Applicant: HOECHST AG

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

IPC: G02F1/13 ,  C07D307/24 ,  C07D307/56 ,  C07D405/12 ,  C07D405/14 ,  C07D407/12 ,  C07D407/14 ,  C07D409/12 ,  C07D409/14 ,  C07D417/12 ,  C07D417/14 ,  C09K19/54 ,  C09K19/58 ,  G02F1/137 ,  G02F1/141

Abstract: Optically active tetrahydrofuran-2-carboxylic acid esters containing a mesogenic molecular building block are suitable as dopes in liquid-crystal mixtures. They result in liquid-crystalline ferroelectric phases having short switching times and in electroclinic phases having high electroclinic coefficients. A further advantage is that they induce a helix of very low pitch, so they are also suitable for helix compensation in LC mixtures. The compounds are symbolised by the general formula in which the symbols and indices essentially have the following meanings: R = alkyl/alkenyl or tetrahydrofurancarbonyloxy or -thio; j, l and n = zero, 1 or 2; k and m = zero or 1; -A , -A and -A = phenylene, cycloalkylene or corresponding N-, O- or S-containing heterocycles; -M and -M = bridges, such as -CO-O-, -OCH2- or -CH=CH-; and X = O or S.

公开(公告)号：DE4011805A1

公开(公告)日：1991-10-17

申请号：DE4011805

申请日：1990-04-12

Applicant: HOECHST AG

Inventor： ESCHER CLAUS DR ,  ILLIAN GERHARD DR ,  ROESCH NORBERT DR ,  HARADA TAKAMASA

IPC: C07D225/02 ,  C07D273/08 ,  C07D323/00 ,  C07D405/12 ,  C07D498/08 ,  C09K19/54 ,  C09K19/56 ,  G02F1/13 ,  G02F1/133 ,  G02F1/1337 ,  G02F1/137 ,  G02F1/141 ,  G09F9/35

Abstract: Addition of coronands and cryptands to FLC-mixtures makes it possible to bring the FLC material into a homogeneous "bookshelf" or "quasi-bookshelf" geometry. When such a FLC mixture is used, displays which have been shock-damaged can be regenerated by applying a suitable electric field for a short period of time.

公开(公告)号：DE3939697A1

公开(公告)日：1991-06-06

申请号：DE3939697

申请日：1989-12-01

Applicant: HOECHST AG

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

IPC: C09K19/02 ,  C09K19/54 ,  C09K19/58

Abstract: Ferroelectric liq crystalline (FLC) mixts (I) contg at least one complex ligand (II) for ions are used in (I)-light valves (ie, devices which with electrical switching change their optical transmission properties so that intensity of incident, and opt re-reflected, light is modulated eg, watch and pocket calculator displays, liq crystal in office automation or TV, also light shutters in copying machines, printers, welding goggles, goggles for 3-dimensional viewing, and spacial light modulators.) (II) is electrically neutral cpd.. (II) complexes cations and has at least 2 N and/or 0 and/or S and/or P donor centres. (II) is medio- or macro-cyclic cpd.. (I) contains 0.01-10 mol% cryptand, coronand, or podand as (II). (I) contains several different (II) for different ions. Light valve is in mutliplex process-regulationed switching device. Light valve has SSFLC cell with layer thickness 1-10 microns and (I) has Sc phase in working temp range. Liq crystal switching and display devices contg (I), support plates, electrodes, at least one orientation layer, and opt additional auxiliary layers. ADVANTAGE - Optical hysteresis is much reduced, formation off ghost images is avoided.

公开(公告)号：DE3917472A1

公开(公告)日：1990-12-06

申请号：DE3917472

申请日：1989-05-30

Applicant: HOECHST AG

Inventor： DUEBAL HANS-ROLF DR ,  ESCHER CLAUS DR ,  ILLIAN GERD DR ,  MURAKAMI MIKIO ,  OHLENDORF DIETER DR

IPC: G02F1/1333 ,  G02F1/1335 ,  G02F1/1362 ,  G02F1/137 ,  G02F1/141

Abstract: PCT No. PCT/EP90/00761 Sec. 371 Date Nov. 27, 1991 Sec. 102(e) Date Nov. 27, 1991 PCT Filed May 11, 1990 PCT Pub. No. WO90/15360 PCT Pub. Date Dec. 13, 1990.A ferroelectric liquid crystal switching or display device, in which the liquid crystal film has a constant thickness, wherein one of the glass sheets in the device is planar and the other glass sheet has at least one step. The switching or display device of the present invention does not require shortened switching times or more contacts or drivers and does not show unwanted switching.

公开(公告)号：DE3909356A1

公开(公告)日：1990-09-27

申请号：DE3909356

申请日：1989-03-22

Applicant: HOECHST AG

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

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.

公开(公告)号：DE3824902A1

公开(公告)日：1990-02-15

申请号：DE3824902

申请日：1988-07-22

Applicant: HOECHST AG

Inventor： SCHEROWSKY G PROF DR ,  GAY JUERGEN ,  WINGEN RAINER DR ,  DUEBAL HANS-ROLF DR ,  ESCHER CLAUS DR ,  HEMMERLING WOLFGANG DR ,  INOGUCHI YOSHIO DR ,  MUELLER INGRID DR ,  OHLENDORF DIETER DR

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

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.

公开(公告)号：DE3839330A1

公开(公告)日：1989-06-08

申请号：DE3839330

申请日：1988-11-22

Applicant: HOECHST AG

Inventor： MEIJERE ARMIN DE PROF DR ,  DUEBAL HANS-ROLF DR ,  ESCHER CLAUS DR ,  HEMMERLING WOLFGANG DR ,  MUELLER INGRID DR ,  OHLENDORF DIETER DR ,  WINGEN RAINER DR

IPC: C07D20060101 ,  C07D213/30 ,  C07D237/08 ,  C07D237/10 ,  C07D237/14 ,  C07D239/26 ,  C07D239/32 ,  C07D239/34 ,  C07D239/38 ,  C07D241/12 ,  C07D285/12 ,  C07D303/48 ,  C07D317/10 ,  C07D405/12 ,  C09K19/34 ,  C09K19/42 ,  C09K19/46 ,  G02F1/13 ,  G02F1/137 ,  G02F1/141

Abstract: The novel cyclopropylalkyl- or -alkenyl-heterocycles of the formula are liquid-crystalline. In this formula, the symbols A , A and A are aromatic or heteroaromatic moieties, such as 1,4-phenylene or pyrimidine-2,5-diyl, which are linked via a single bond (where k and m = zero) or via functional groups M and M , such as CO-O or CH2-O; j, k, l, m and n are zero or 1 (j + l + n = 2 or 3). The radicals R , R and R are H or alkyl/alkenyl, R is alkyl/alkenyl or a substituent known from LC chemistry, such as an alpha -haloalkanoic acid radical. In addition, at least one of the units A , A and A must be heteroaromatic, G is alkylene or alkenylene.