公开(公告)号：DE59009764D1

公开(公告)日：1995-11-16

申请号：DE59009764

申请日：1990-07-31

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：DE3929691A1

公开(公告)日：1991-03-14

申请号：DE3929691

申请日：1989-09-07

Applicant: HOECHST AG

Inventor： FELDHUES MICHAEL DR ,  PAMPUS KARL DR

IPC: C25B3/00 ,  C08G61/10 ,  C08G61/12 ,  H01B1/12

公开(公告)号：DE4114464A1

公开(公告)日：1992-02-13

申请号：DE4114464

申请日：1991-05-03

Applicant: HOECHST AG

Inventor： FELDHUES MICHAEL DR ,  MILLAUER HANS DR ,  PAMPUS KARL DR

IPC: C08G61/12 ,  H01B1/12

Abstract: Prodn. of poly-(3-alkoxythiophene) (I) is by electrochemical anodic polymerisation of cpds. of formula (II) or a mixt. of several such cpds.. The process is carried out in an electrolysis cell which is divided by an anion exchange membrane (M), with the anolyte kept in motion relative to the anode. In (II) R = linear or branched 1-15C alkyl, or -(CH2CH2O)pMe (with p = 1-4). Specifically; the anolyte is agitated with a stirrer or circulating pump, pref. so that the flow rate w.r.t. the anode is 0.01-2 (pref. 0.1-1) m/sec.. (M) is based on fluoropolymer, and the catholyte and anolyte contain added conducting salt (III). Electrolysis is carried out at 5-100 (pref. 10-50) mA/cm2; and the electrolysis prod. is washed out of the cell with the anolyte, in which it is partly or completely dissolved or dispersed. USE/ADVANTAGE - (I) is useful, e.g. as an antistatic finish for film, fibre, fabric, etc., for controlling the surface charge on non-conductors and for electrical screening. The process can be carried out at high current density, with a marked improvement in surface-time yield. The prod. (I) has very good conductivity, solubility above 2 wt.% and good resistance to air and moisture.

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.