公开(公告)号：NO902795A

公开(公告)日：1990-12-27

申请号：NO902795

申请日：1990-06-22

Applicant: HOECHST AG

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

IPC: G02F1/1337 ,  C09K19/02 ,  C09K19/34 ,  C09K19/58 ,  G02F1/141 ,  G02F1/13 ,  G02F1/133

CPC classification number: C09K19/58 ,  C09K19/0225 ,  C09K19/588 ,  G02F1/141

公开(公告)号：DE3919839A1

公开(公告)日：1990-12-20

申请号：DE3919839

申请日：1989-06-17

Applicant: HOECHST AG

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

IPC: C09K19/42 ,  G02F1/137 ,  G02F1/141

Abstract: The liquid-crystal element described consists of a housing with transparent discs and electrodes, polarisation foils, orientation films, plus a smectic ferro-electric liquid-crystalline material. This FLC material is dielectrically positive (i.e. DELTA epsilon >0), with the result that the liquid-crystal element has a high contrast and, in addition, is switchable even when high voltages (e.g. greater than 15 V) are applied. Unlike LC elements with dielectrically negative material, no change in surface texture occurs under such conditions. The increase in the effective cone angle produced by applying an electric field to the element described above can also be used to produce so-called grey shades.

公开(公告)号：NO902111A

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 ,  C07C43/21 ,  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

CPC classification number: C07D213/30 ,  C07C43/184 ,  C07C43/21 ,  C07C69/92 ,  C07D239/26 ,  C07D239/34 ,  C09K19/30 ,  C09K19/3066 ,  C09K19/3444 ,  C09K19/3469

公开(公告)号：DE3909355A1

公开(公告)日：1990-09-27

申请号：DE3909355

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

Abstract: Ferroelectric liquid crystal mixtures are based on at least 2 mixing components of general formula (I) and contain, in addition, at least one optically active dopant from one or more of the following groups: (a) optically active esters of tetrahydrofuran-2-carboxylic acid; (b) optically active aryl-2,3-epoxyalkyl ethers; (c) optically active 1,3-dioxolan-4-yl-ethers. Said mixtures possess high spontaneous polarization and permit substantial compensation of the pitch of the helix in a nematic phase.

公开(公告)号：DE3843228A1

公开(公告)日：1990-06-28

申请号：DE3843228

申请日：1988-12-22

Applicant: HOECHST AG

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

IPC: G02F1/1337 ,  G02F1/1343 ,  G02F1/141

公开(公告)号：NO893778L

公开(公告)日：1990-03-26

申请号：NO893778

申请日：1989-09-22

Applicant: HOECHST AG

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

IPC: G02F1/13 ,  C07D317/24 ,  C07D317/30 ,  C07D317/32 ,  C07D405/12 ,  C07D405/14 ,  C09K19/34 ,  C09K19/54 ,  G09F9/35 ,  C09K19/58

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.

公开(公告)号：NO893242L

公开(公告)日：1990-02-14

申请号：NO893242

申请日：1989-08-11

Applicant: HOECHST AG

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

IPC: G02F1/13 ,  C07F7/08 ,  C07F7/10 ,  C09K19/40 ,  C09K19/42 ,  C09K19/46 ,  G02F1/137 ,  G02F1/141

Abstract: The novel silylalkyl or -alkenyl compounds conform to the general formula (I) in which A , A and A are aromatic or heteroaromatic molecular units such as 1,4-phenylene or pyrimidine-2,5-diyl which are linked via a single bond (where k and m are 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 , R and R are H or alkyl/alkenyl or cycloalkyl, the radicals R , R and R have a comparable meaning (H); R is alkyl/alkenyl or a substituent known from LC chemistry, such as an alpha -haloalkanoic acid radical. The compounds have liquid-crystalline phases, which are in some cases broad and polymorphous.

公开(公告)号：NO893242A

公开(公告)日：1990-02-14

申请号：NO893242

申请日：1989-08-11

Applicant: HOECHST AG

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

IPC: G02F1/13 ,  C07F7/08 ,  C07F7/10 ,  C09K19/40 ,  C09K19/42 ,  C09K19/46 ,  G02F1/137 ,  G02F1/141

CPC classification number: C07F7/0812 ,  C07F7/0818 ,  C09K19/406

公开(公告)号：NO893241L

公开(公告)日：1990-02-14

申请号：NO893241

申请日：1989-08-11

Applicant: HOECHST AG

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

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 ,  C09K19/30

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：NO895181D0

公开(公告)日：1989-12-21

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 ,  G02F