公开(公告)号：DE3833631A1

公开(公告)日：1990-04-05

申请号：DE3833631

申请日：1988-10-04

Applicant: HOECHST AG

Inventor： DUEBAL HANS-ROLF DR ,  MURAKAMI MIKIO ,  HERRMANN-SCHOENHERR OTTO DR ,  SCHNELLER ARNOLD DR

IPC: G02F1/13 ,  C08G69/32 ,  C08L77/00 ,  G02F1/1337

Abstract: Preparation of specific substituted aromatic polyamides containing structural units of the formula I indicated, and copolyamides containing at least 10 mol-% of structural units of the formula I and structural units of the formula II indicated, and their use as the orientation layer in liquid-crystal display devices and/or liquid crystal switching devices.

公开(公告)号：DE59009245D1

公开(公告)日：1995-07-20

申请号：DE59009245

申请日：1990-03-21

Applicant: HOECHST AG

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

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

Abstract: Ferroelectric liquid-crystal systems having high spontaneous polarization, in particular >35 nC cm-2, and good orientation properties in the ferroelectric phase, in particular the SC* phase, contain at least three different optically active compounds, preferably as dopes in a base mixture which is not itself optically active and has a nematic phase above the smectic phase. The optically active compounds are selected so that they do not all induce a helix of the same rotation sense in the nematic phase. Their relative concentrations are selected so that the total resultant pitch of the helix throughout the cholesteric phase is not less than 10 mu m.

公开(公告)号：PT95924A

公开(公告)日：1994-02-28

申请号：PT9592490

申请日：1990-11-16

Applicant: HOECHST AG

Inventor： SCHNELLER ARNOLD ,  HERRMANN-SCHONHERR OTTO ,  DUEBAL HANS-ROLF ,  MURAKAMI MIKIO

IPC: C08G69/32 ,  G02F1/1337 ,  G02F1/00

Abstract: PCT No. PCT/EP90/01893 Sec. 371 Date Apr. 21, 1992 Sec. 102(e) Date Apr. 21, 1992 PCT Filed Nov. 12, 1990 PCT Pub. No. WO91/08509 PCT Pub. Date Jun. 13, 1991.Use of fluorinated aromatic polyamides as orientation layer for liquid crystal switching and display devices Use of substituted aromatic polyamides as orientation layer in liquid crystal switching and display elements is described, in which the polyamides contain structural units of the formula (I) (I) in which in formula I the symbols have the following meaning: in which R1 and R2 are identical or different and are perfluorinated alkyl having 1 to 4 carbon atoms, R3 and R4 are identical or different and are H or CF3, and in which -W- is, for example, -O-, -C(CH3)2-, -C(CF3)2-. Orientation layers made of these polyamides can be cured at low temperatures, have good adhesion and high transmittance and allow for a high surface tilt angle.

公开(公告)号：DE58906564D1

公开(公告)日：1994-02-10

申请号：DE58906564

申请日：1989-09-19

Applicant: HOECHST AG

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

IPC: C07D303/48 ,  C07D317/32 ,  C07D317/34 ,  C07D317/72 ,  C07D405/12 ,  C07D405/14 ,  C07D407/12 ,  C07D407/14 ,  C07D409/12 ,  C07D409/14 ,  C07D417/12 ,  C07D417/14 ,  C09K19/34 ,  C09K19/58

Abstract: Optically active 1,3-dioxolane-4-carboxylic acid esters and oxirane-2-carboxylic acid esters of the general formula (I) where R is, for example, C1-C16-alkyl or C1-C16-alkoxy, A , A and A are, for example, phenyl or pyrimidine-2,5-diyl, M and M are, for example, CO-O or CH2-CH2, j and l are 0, 1 or 2, k and m are 0 or 1, n is 0, 1 or 2, X is O or S and Ac is or where R , R , R , R and R are, for example, H or methyl, are particularly suitable doping agents for liquid-crystalline mixtures since they induce a high spontaneous polarisation and considerably reduce the melting point.

公开(公告)号：NO921928L

公开(公告)日：1992-05-15

申请号：NO921928

申请日：1992-05-15

Applicant: HOECHST AG

Inventor： DUEBAL HANS-ROLF ,  MURAKAMI MIKIO ,  HERRMANN-SCHOENHERR OTTO ,  SCHNELLER ARNOLD

IPC: C08G69/32 ,  G02F20060101 ,  G02F1/1337

公开(公告)号：NO921928D0

公开(公告)日：1992-05-15

申请号：NO921928

申请日：1992-05-15

Applicant: HOECHST AG

Inventor： DUEBAL HANS-ROLF ,  MURAKAMI MIKIO ,  HERRMANN-SCHOENHERR OTTO ,  SCHNELLER ARNOLD

IPC: C08G69/32 ,  G02F20060101 ,  G02F1/1337 ,  G02F

公开(公告)号：NO921928A

公开(公告)日：1992-05-15

申请号：NO921928

申请日：1992-05-15

Applicant: HOECHST AG

Inventor： DUEBAL HANS-ROLF ,  MURAKAMI MIKIO ,  HERRMANN-SCHOENHERR OTTO ,  SCHNELLER ARNOLD

IPC: C08G69/32 ,  G02F20060101 ,  G02F1/1337

公开(公告)号：DE3915804A1

公开(公告)日：1990-11-15

申请号：DE3915804

申请日：1989-05-13

Applicant: HOECHST AG

Inventor： MEIJERE ARMIN DE PROF DR ,  DUEBAL HANS-ROLF DR ,  ESCHER CLAUS DR ,  HARADA TAKAMARA ,  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.

公开(公告)号：DE3909354A1

公开(公告)日：1990-09-27

申请号：DE3909354

申请日：1989-03-22

Applicant: HOECHST AG

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

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

Abstract: Ferroelectric liquid crystal systems with high spontaneous polarization, in particular greater than 35 nC cm , and good orientation properties in the ferroelectric phase, in particular, the SC* phase, contain at least three different optically active compounds, preferably dopants in a non-optically active basic mixture which has a nematic phase above the smectic phase. The optically active compounds are chosen so that they do not all induce a helix with an identical direction of rotation in the nematic phase. Their relative concentration is chosen so that the overall resulting pitch of the helix in the total cholesterol phase is not less than 10 mu m.

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.