公开(公告)号：DE3827601A1

公开(公告)日：1990-02-15

申请号：DE3827601

申请日：1988-08-13

Applicant: HOECHST AG

Inventor： SCHEROWSKY GUENTER PROF ,  SCHLIWA ANDREAS DIPL CHEM

IPC: C07F7/08 ,  C08F283/12 ,  C08G77/38 ,  C08G77/388 ,  C09K19/38 ,  C09K19/40 ,  G02F1/13 ,  G02F1/137

Abstract: Ferroelectric liquid-crystal polymers containing Si and corresponding to formula (I), where z = CH3 or a group according to formula (II): (CH2)a(-B)b-M (-A )c(-M )d(-A )e(-M )f(-A )g-R , provided that at least two z substitutes in the polymer are a group according to formula (II); n = 5 to 500; B = for example a group of formula (III); A , A , A = for example pyrimidin-2,5-diyl; M , M = for example CO-O or O-CO; M = O, CH2-CH2, O-CO or COO; R = for example alkyl with 1 to 16 atoms of C; a = 2 to 20; b, c, d, e, f, g = 0 or 1, and G = for example alkylene with 1 to 16 atoms of C. Said polymers are suitable for use in electro-optical elements because of their short switching times.

公开(公告)号：DE58906540D1

公开(公告)日：1994-02-10

申请号：DE58906540

申请日：1989-07-15

Applicant: HOECHST AG

Inventor： SCHEROWSKY GUENTER PROF ,  GAY JUERGEN ,  WINGEN RAINER DR ,  DUEBAL HANS-ROLF DR ,  ESCHER CLAUS DR ,  HEMMERLING WOLFGANG DR ,  INOGUCHI YOSHIO DR ,  MUELLER INGRID DR ,  OHLENDORF DIETER DR

IPC: G02F1/13 ,  C07D317/22 ,  C07D317/24 ,  C07D317/36 ,  C07D317/72 ,  C07D405/12 ,  C07D405/14 ,  C07D407/12 ,  C07D409/12 ,  C07D409/14 ,  C07D417/12 ,  C07D417/14 ,  C09K19/34 ,  C09K19/54 ,  C09K19/58 ,  G02F1/137 ,  G02F1/33

Abstract: Optically active 1,3-dioxolane derivates of the general formula which carry a mesogenic radical in the 4-position are suitable as dopes in - in particular ferroelectric - liquid-crystal mixtures. The symbols in the general formula have the following meanings: R has a structure analogous to the moiety of the general formula on the right of X or is an alkyl or alkylene radical, which may be substituted, R , R and R are H or alkyl (R is alternatively alkenyl), which may also be substituted [R and R , together with the C(2) of the dioxolane ring, may alternatively be cycloaliphatic or keto groups], j, l and n are zero, 1 or 2, and k and m are zero or 1, with the proviso that n is zero if k is zero, m is zero if n is zero, and 1 , -A and -A are an aromatic, heterocyclic or aliphatic ring system, -M and -M are -CO-O, -O-CO, -CH2CH2, -CH=CH, -CH2O, -OCH2 or -C IDENTICAL C and X is O, S or O-CO-O. The particular advantage of the compounds of the general formula (I) is that they are able to induce a high twisting power in the cholesteric phase, but without significantly affecting the magnitude of the spontaneous polarisation already present in the mixture in the smectic C phase. They are therefore suitable for pitch compensation, in particular for ferroelectric liquid-crystal mixtures.

公开(公告)号：AT99304T

公开(公告)日：1994-01-15

申请号：AT89113045

申请日：1989-07-15

Applicant: HOECHST AG

Inventor： SCHEROWSKY GUENTER PROF ,  GAY JUERGEN ,  WINGEN RAINER DR ,  DUEBAL HANS-ROLF DR ,  ESCHER CLAUS DR ,  HEMMERLING WOLFGANG DR ,  INOGUCHI YOSHIO DR ,  MUELLER INGRID DR ,  OHLENDORF DIETER DR

IPC: G02F1/13 ,  C07D317/22 ,  C07D317/24 ,  C07D317/36 ,  C07D317/72 ,  C07D405/12 ,  C07D405/14 ,  C07D407/12 ,  C07D409/12 ,  C07D409/14 ,  C07D417/12 ,  C07D417/14 ,  C09K19/34 ,  C09K19/54 ,  C09K19/58 ,  G02F1/137 ,  G02F1/33

公开(公告)号：DE3823154A1

公开(公告)日：1990-01-11

申请号：DE3823154

申请日：1988-07-08

Applicant: HOECHST AG

Inventor： SCHEROWSKY GUENTER PROF ,  SCHLIWA ANDREAS DIPL CHEM ,  TRAPP WOLFGANG DIPL CHEM

IPC: G02F1/13 ,  C07C69/773 ,  C08F20/10 ,  C08F20/26 ,  C08F20/30 ,  C08F20/32 ,  C08F20/34 ,  C08F20/36 ,  C08F20/38 ,  C08F120/30 ,  C08F220/30 ,  C08F220/32 ,  C08F220/36 ,  C08F290/00 ,  C08F299/02 ,  C09K19/02 ,  C09K19/38

Abstract: PCT No. PCT/EP89/00745 Sec. 371 Date Jan. 3, 1991 Sec. 102(e) Date Jan. 3, 1991 PCT Filed Jun. 29, 1989 PCT Pub. No. WO90/00584 PCT Pub. Date Jan. 25, 1990.A ferroelectric, liquid-crystalline polymer is composed of repeating units of the formula (I) (* CHEMICAL STRUCTURE *) in which Y1=H, CH3 or F Y2=H or F R1= (* CHEMICAL STRUCTURE *) or an achiral alkyl having 2 to 16 carbon atoms, and R3=H or CH3 R2=CH3, Cl or CN g and h=an integer from 0 to 10 a=2 to 20, preferably 6 to 12 b,c,d,e and f=0 or 1, where d+e+f=2 or 3 A1,A2and A3=for example, 1,4-phenylene in which one or two hydrogen atoms may be substituted by F, Cl and/or CN, 1,4-cyclohexylene and M1,M2 and M3=for example, CO-O or O-CO. These liquid-crystalline polymers have short response times and high resistance to mechanical stresses. They can be prepared by free-radical polymerization.

公开(公告)号：DE4120783A1

公开(公告)日：1993-01-07

申请号：DE4120783

申请日：1991-06-24

Applicant: HOECHST AG

Inventor： SCHEROWSKY GUENTER PROF ,  JUNGHANS CLAAS

IPC: C07D303/23 ,  C07D303/24 ,  C07D405/12 ,  C09K19/58

Abstract: Novel optically active mesogenic structured oxiran derivs. of formula (I), liq. crystal mixts. contg. (I) as dopant and electro-optical switching or display elements contg. such liq. crystal mixts., are claimed. In (I), R is opt. branched 6-12 alk(en)yl, opt. contg. an asymmetric C atom; M is -O-, -S-, -O.CO-, -CO.O- or -CO-; A is a gp. of formula (II)-(XIV) in which the phenylene rings can have one or two F atoms as substits.; X is MeOCH2CH2OCH2O-, alkoxy, alkylcarbonyloxy, halogen, trialkylsilyl or tetrahydropyranyl; Y is -CH2- or -CO-; n is 1-10; and k is 0 or 1. USE/ADVANTAGE - (I) are esp. useful at 0.05-70 (esp. 0.1-50) wt.% as dopants in tilted, smectic phases, converting these to ferroelectric phases, spontaneous polarisation valves are in the range 1-15 nC/cm2 at 10 mol.% doping and 25 deg.C extrapolating to valves of 10-150 nC/cm2 for pure (I). Switching times for the mixts. at 25 deg.C with 10 mol.% (I) dosage are often below 100 microsecs. at +/- 10 V/micron switch voltage. Also, (I) can induce very low pitch helices, making them suitable for helix compensation in liq. crystal mixts. (I) also give phases with high electrocline coeffts.

公开(公告)号：DE3823153A1

公开(公告)日：1990-01-11

申请号：DE3823153

申请日：1988-07-08

Applicant: HOECHST AG

Inventor： SCHEROWSKY GUENTER PROF ,  MUELLER UWE DIPL CHEM

IPC: G02F1/13 ,  C08F20/10 ,  C08F20/26 ,  C08F20/30 ,  C08F20/34 ,  C08F20/36 ,  C08F120/30 ,  C08F120/36 ,  C09K19/38 ,  G02F1/137 ,  G09F9/35

Abstract: Ferroelectric, liquid-crystaline polymers contain repeating units of the formula (I) in which the symbols have the following meanings: B=a group having at least one chiral center, of the formula in which R6, R7 and R8 are identical or different and are H, CH3, OCH3, F, Cl or Br, and at least one of the groups R6, R7 and R8 must be H and X=H, F, Cl or Br and R9=H or C1-C10-alkyl, Y=H, CH3 or F, R1=for example a straight-chain or branched alkyl having 1 to 16 carbon atoms a=2 to 20, preferably 6 to 12 b, c, d, e and f=0 or 1 with the proviso that d+e+f=2 or 3 A1, A2, A3=for example, 1,4-phenylene or 2,5-pyridinediyl, M1, M2 and M3=for example CO-O, or O-CO, and G=for example, a straight-chain or branched alkylene having 1 to 16 carbon atoms.