公开(公告)号：NO913463L

公开(公告)日：1991-09-03

申请号：NO913463

申请日：1991-09-03

Applicant: HOECHST AG

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

IPC: C07D317/72 ,  C07D405/00 ,  C07D405/12 ,  C09K19/34 ,  G02F1/13

公开(公告)号：DE4002082A1

公开(公告)日：1991-08-01

申请号：DE4002082

申请日：1990-01-25

Applicant: HOECHST AG

Inventor： DUEBAL HANS-ROLF DR ,  MURAKAMI MIKIO ,  DROTLOFF HANS-OTTO DR ,  BREKNER MICHAEL DR

IPC: C09K19/56 ,  C08G65/40 ,  G02F1/1337

Abstract: The use of polyaryl ether ketones of the structural unit -O-A-O-B- gives alignment layers for liquid-crystal displays and switching elements which have high transparency, low water-absorption capacity and a particularly uniform alignment, both of smectic and nematic liquid crystals, and thus enable high contrast to be obtained.

公开(公告)号：DE3925970A1

公开(公告)日：1991-02-07

申请号：DE3925970

申请日：1989-08-05

Applicant: HOECHST AG

Inventor： ESCHER CLAUS DR ,  DUEBAL HANS-ROLF DR ,  FELDHUES MICHAEL DR ,  HARADA TAKAMASA ,  ILLIAN GERHARD DR ,  MECKLENBURG THOMAS DR ,  MURAKAMI MIKIO ,  OHLENDORF DIETER DR ,  PAMPUS KARL DR

IPC: C08G61/12 ,  G02F1/1337 ,  G02F1/141 ,  G09F9/35

Abstract: Switching and display elements based on ferroelectric liquid-crystals often exhibit a pronounced optical hysteresis which results in the appearance of so-called ghost images. This phenomenon can be markedly reduced or even suppressed if at least one of the two orienting layers are in direct contact with the electrodes and is composed of an electrically conductive polymer of the formula (I): (I) in which R1, R2=independently of each other, H, or straight-chain or branched alkyl or alkoxy containing 1-16 carbon atoms, or halogen, X=S, NH, Y-=BF4-, PF6-, PO43-, AsF6-, SbCl6-, SO42-, HSO4-, alkyl-SO3-, perfluoroalkyl-SO3-, aryl-SO3, F- or Cl-, and n is an integer from 4 to 100 and m is an integer from 1 to 30.

公开(公告)号：DE3920625A1

公开(公告)日：1991-01-03

申请号：DE3920625

申请日：1989-06-23

Applicant: HOECHST AG

Inventor： ESCHER CLAUS DR ,  HEMMERLING WOLFGANG DR ,  ILLIAN GERHARD DR ,  HARADA TAKAMASA ,  MURAKAMI MIKIO

IPC: G02F1/1337 ,  C09K19/02 ,  C09K19/34 ,  C09K19/58 ,  G02F1/137 ,  G02F1/141

Abstract: Liquid-crystalline materials are becoming increasingly important in electrooptical switching and display devices. Recently, ferroelectric liquid-crystalline mixtures have also been investigated widely and employed in displays. A particularly important physical parameter for describing FLC mixtures is the spontaneous polarisation (Ps). On the one hand, a high spontaneous polarisation results in short response times, but on the other hand, high Ps values result in optical hysteresis, which causes, inter alia, so-called "ghost images". The use of FLC mixtures of high spontaneous polarisation (Ps 20 nC/cm ) and a natural helical pitch of less than half the layer thickness in an SSFLC display having a layer thickness of from 1 to 10 mu m allows the problem of optical hysteresis to be circumvented, in spite of the high spontaneous polarisation. FLC mixtures in which Ps is > 40 nC/cm can also be switched under these conditions.

公开(公告)号：NO902111L

公开(公告)日：1990-11-14

申请号：NO902111

申请日：1990-05-11

Applicant: HOECHST AG

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

IPC: G02F1/13 ,  C07C13/04 ,  C07C13/28 ,  C07C22/00 ,  C07C25/00 ,  C07C43/184 ,  C07C43/205 ,  C07C43/21 ,  C07C69/92 ,  C07C255/45 ,  C07D213/30 ,  C07D237/08 ,  C07D237/14 ,  C07D237/16 ,  C07D237/18 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C07D241/12 ,  C07D241/18 ,  C07D285/12 ,  C07D285/125 ,  C07D285/13 ,  C07D405/12 ,  C09K19/20 ,  C09K19/30 ,  C09K19/34

Abstract: The novel cyclopropylalkyl or -alkenyl compounds have the general formula In this formula, the symbols A , A , A denote unsubstituted and in particular substituted (by halogen or CN) aromatic or heteroaromatic molecular building blocks, such as 1,4-phenylene or pyrimidine-2,5- diyl, which are linked via a single bond or via functional groups M , M , such as CO-O or CH2-O; H and m are zero or 1; j, l, n are zero, 1 or 2. The radicals are R , R , R are H or alkyl/alkenyl, R is alkyl/alkenyl or a substituent known from LC chemistry, such as an alpha - haloalkanoic acid radical. G denotes alkylene or alkenylene.

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：NO895181A

公开(公告)日：1990-06-25

申请号：NO895181

申请日：1989-12-21

Applicant: HOECHST AG

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

IPC: G02F1/1337 ,  G02F1/1343 ,  G02F1/141 ,  G02F1/133 ,  G09F9/35

CPC classification number: G02F1/13439 ,  G02F1/1337 ,  G02F1/141

公开(公告)号：DE69128625D1

公开(公告)日：1998-02-12

申请号：DE69128625

申请日：1991-07-17

Applicant: HOECHST AG

Inventor： MURAKAMI MIKIO ,  HARADA TAKAMASA

IPC: C08G63/60 ,  C09K19/02 ,  C09K19/56 ,  G02F1/1337

Abstract: PCT No. PCT/EP91/01339 Sec. 371 Date Jan. 12, 1993 Sec. 102(e) Date Jan. 12, 1993 PCT Filed Jul. 17, 1991 PCT Pub. No. WO92/01728 PCT Pub. Date Feb. 6, 1992.A liquid-crystal display device having a liquid-crystal layer held between a pair of substrates each having a transparent electrode and an alignment film formed successively on the inner surface, characterized in that the material of the alignment film on at least one of the opposing faces between the substrates is a polymer having recurring units (I, II and III), the recurring unit (I) being represented by formula (A), (A) recurring unit II being a dioxyaryl portion represented by the formula -O-Ar-O- (where Ar is a divalent group having at least one aromatic ring which may contain at least one substituent selected from a C1-4 alkyl group, a C1-4 alkoxy group, a halogen, a phenyl and a substituted phenyl), and recurring unit (III) being a dicarboxyaryl portion represented by formula (B) (B) (where Ar' may be the same as or different from Ar and has the same meaning as Ar).

公开(公告)号：DE59010108D1

公开(公告)日：1996-03-21

申请号：DE59010108

申请日：1990-05-10

Applicant: HOECHST AG

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

IPC: G02F1/13 ,  C07C13/04 ,  C07C13/28 ,  C07C22/00 ,  C07C25/00 ,  C07C43/184 ,  C07C43/205 ,  C07C43/21 ,  C07C69/92 ,  C07C255/45 ,  C07D213/30 ,  C07D237/08 ,  C07D237/14 ,  C07D237/16 ,  C07D237/18 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C07D241/12 ,  C07D241/18 ,  C07D285/12 ,  C07D285/125 ,  C07D285/13 ,  C07D405/12 ,  C09K19/20 ,  C09K19/30 ,  C09K19/34

Abstract: The novel cyclopropylalkyl or -alkenyl compounds have the general formula In this formula, the symbols A , A , A denote unsubstituted and in particular substituted (by halogen or CN) aromatic or heteroaromatic molecular building blocks, such as 1,4-phenylene or pyrimidine-2,5- diyl, which are linked via a single bond or via functional groups M , M , such as CO-O or CH2-O; H and m are zero or 1; j, l, n are zero, 1 or 2. The radicals are R , R , R are H or alkyl/alkenyl, R is alkyl/alkenyl or a substituent known from LC chemistry, such as an alpha - haloalkanoic acid radical. G denotes alkylene or alkenylene.