公开(公告)号：DE19540389A1

公开(公告)日：1996-05-23

申请号：DE19540389

申请日：1995-10-30

Applicant: HOECHST AG

Inventor： TAKEICHI AYAKO ,  NONAKA THOSHIAKI ,  NAGAO KAZUYA ,  YAMAGUCHI HIDEMASA ,  HARADA TAKAMASA DR

IPC: G02F1/13 ,  C09K19/02 ,  C09K19/34 ,  G09F9/35 ,  C07D405/12 ,  C07D239/34

Abstract: Liq. crystal (LC) mixt. has (a) a temp. range showing a chiral smectic c-phase and (b) a temp. range showing a smectic a-phase. The difference between the conical angles at (Tc/a -10) and (Tc/a 40) deg C is 10 degrees or less in the temp. range (a), with Tc/a being the phase transition temp. between the c- and a-phases. Also claimed are display devices in which the LC layer contains the above mixt.

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.