公开(公告)号：DE3713273A1

公开(公告)日：1988-11-03

申请号：DE3713273

申请日：1987-04-18

Applicant: HOECHST AG

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

IPC: C07D317/24 ,  C07D317/32 ,  C07D317/72 ,  C07D405/12 ,  C07D407/12 ,  C07D409/12 ,  C09K19/02 ,  C09K19/34 ,  C09K19/54 ,  C09K19/58 ,  G02F1/133 ,  G02F1/137 ,  G02F1/141 ,  C07D417/12 ,  G02F1/13 ,  G09F9/35

Abstract: Optically active and mesogenic 1,3-dioxolane-4-carboxylic esters are suitable for use as dopants in liquid crystal mixtures. They lead to liquid-crystalline ferroelectric phases having short response times and to electroclinic phases having large electroclinic coefficients. Their particular advantage is that they induce a helix of very large pitch, so that there is no need for any helix compensation by other dopants. Moreover, the 1,3-dioxolane-4-carboxylic esters exhibit high UV stability.

公开(公告)号：DE3709618A1

公开(公告)日：1988-10-06

申请号：DE3709618

申请日：1987-03-24

Applicant: HOECHST AG

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

IPC: G02F1/137 ,  C07D239/26 ,  C07D239/34 ,  C07D239/38 ,  C09K19/34 ,  G02F1/141 ,  G02F1/13

Abstract: The liquid-crystalline 5-phenylpyrimidine derivatives have an Sc or Sc phase and are described by the formula (I) in which the symbols have the following meaning: R and R denote identical or different, straight-chain or branched alkyl or alkenyl groups having k to 16 carbon atoms, with or without an asymmetric carbon atom, it also being possible for one or more non-adjacent CH2 groups to be replaced by -O- and/or -S- -A and -B in each case denote or in which the radicals R , R are in each case on the phenylene portion of -A, -B and m and n denote 0 or 1, but m and n do not denote simultaneously 1, with the following provisos: a) for m = n = 0 k is 8 and in R the CH2 group next to the phenyl ring is replaced by -O-; b) for m = 1 and n = 0 k is 2, and c) for m = 0 and n = 1 k is 2 and in R the CH2 group next to the phenyl ring is replaced by -O-.

公开(公告)号：DE3709549A1

公开(公告)日：1988-10-06

申请号：DE3709549

申请日：1987-03-24

Applicant: HOECHST AG

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

IPC: G02F1/137 ,  C09K19/34 ,  C09K19/42 ,  G02F1/13 ,  G02F1/141

Abstract: The compounds of the general formula (I) (I) are particularly highly suitable as components of smectic, liquid-crystal mixtures, the symbols having the following meaning: R1 and R2 denote identical or different, straight-chain or branched alkyl or alkenyl groups which can contain asymmetric carbon atoms, containing 2 to 16 carbon atoms, in which one or more non-adjacent -CH2- groups can be replaced by -O- and/or -S-, -A and -B each denote group in which the radicals R1, R2, in each case, are situated at the phenylene part of -A, -B and m and n denote 0 or 1, but m+n is always zero or 1.

公开(公告)号：DE19610015A1

公开(公告)日：1997-09-18

申请号：DE19610015

申请日：1996-03-14

Applicant: HOECHST AG

Inventor： KUEHN HEINRICH ,  ESCHER CLAUS DR ,  LANDES KLAUS PROF DR ,  HASLBECK PETER DR ,  GASCHLER OTFRIED DIPL ING ,  MUELLER MARKUS ,  MUNTWYLER PETER

IPC: B05B7/22 ,  B41N1/00 ,  B41N7/04 ,  C23C4/134 ,  F24J2/48 ,  H05H1/42 ,  C23C4/14 ,  B01J21/04 ,  B01J23/70 ,  B21D17/04 ,  B24C1/06 ,  B41N3/00 ,  C23C4/02 ,  C23C4/06 ,  C23C4/10 ,  C23C4/18 ,  F24J3/00

Abstract: In a process for plasma spray coating of a substrate using a spray powder which is melted in the plasma, the powder is supplied into the region of the anode(s) or the neutrode(s) or, between these, into a channel of a plasma spray unit, one or more arcs have a length of 20 mm. or more at least intermittently and the substrate is an endless strip or a large surface of at least 0.005 (pref. at least 0.01, esp. at least 0.05) m size. Pref. the substrate consists of a metal or alloy, a plastics opt. contg. filler, a paper-contg. material, a composite material or a composite body, esp. aluminium (alloy), backed aluminium foil or a plastic (esp. polyester) foil. Pref. the coating comprises a material rich in oxide, silicate, titanate, boride, carbide, nitride, metal, metal alloy and/or inorganic pigment, esp. in aluminium oxide, spinel, titanium boride, Al, Ni (alloy) or Cu (alloy). Also claimed are: (i) a plasma spray coating appts.; and (ii) a plate for a printing machine, comprising a substrate and a plasma sprayed layer.

公开(公告)号：DE19603196A1

公开(公告)日：1997-08-07

申请号：DE19603196

申请日：1996-01-30

Applicant: HOECHST AG

Inventor： KUEHN HEINRICH ,  BROCKMEYER ANDREAS DR ,  ESCHER CLAUS DR ,  VOSBERG DIETMAR ,  SUESBRICH STEPHAN

IPC: A61K6/083 ,  A61K8/11 ,  A61K8/26 ,  A61K9/50 ,  A61Q1/12 ,  B22F1/00 ,  C03B19/10 ,  C03C11/00 ,  C04B35/622 ,  C08K7/24 ,  C09C1/00 ,  C08K7/18 ,  C09J7/02 ,  C09J5/06 ,  A61K6/00 ,  B22F9/08 ,  C09G1/02 ,  C09D7/12 ,  C09D5/36 ,  C09D17/00 ,  C09K3/14

Abstract: Hollow inorganic microspheres with an average size of 0.5-1000 mu m and having a shell of fused and at least partially crystallised material and an average value of 0.3-1 for the Exner shape factor fe = 4A/ pi Dmax in which A = the projected area of the external surface of a particle and Dmax = the maximum diameter of the particles, as a measure of the deviation from circular of the particle. Also claimed are a process for producing the particles and uses for the products.

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.

公开(公告)号：DE4221784A1

公开(公告)日：1994-01-05

申请号：DE4221784

申请日：1992-07-03

Applicant: HOECHST AG

Inventor： JUNGBAUER DIETMAR DR ,  RIEGER HEINZ JOACHIM DR ,  ESCHER CLAUS DR

IPC: G02F1/137 ,  G02F1/133 ,  G02F1/1337 ,  G02F1/141 ,  G09G3/36 ,  G02F1/135

Abstract: A process for stabilising the spatial orientation of the smectic layers in an FLC switching and/or display component, in which the original geometry of the smectic layers was modified by electrical field processing, characterized in that the component is alternately switched during inoperational periods and/or when a given temperature is exceeded beyond a predetermined temperature range including the working temperature range, and/or on going below a given temperature lying below a predetermined temperature range which includes the working temperature range. The use of the process of the invention ensures the continuous operation of the switching and display device even with the repeated regeneration of the "quasi bookshelf geometry" and prevents a reduction in contrast and brightness and the appearance of ghost images.

公开(公告)号：DE3885128D1

公开(公告)日：1993-12-02

申请号：DE3885128

申请日：1988-03-22

Applicant: HOECHST AG

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

IPC: G02F1/137 ,  C09K19/34 ,  C09K19/42 ,  G02F1/13 ,  G02F1/141

Abstract: The compounds of the general formula (I) (I) are particularly highly suitable as components of smectic, liquid-crystal mixtures, the symbols having the following meaning: R1 and R2 denote identical or different, straight-chain or branched alkyl or alkenyl groups which can contain asymmetric carbon atoms, containing 2 to 16 carbon atoms, in which one or more non-adjacent -CH2- groups can be replaced by -O- and/or -S-, -A and -B each denote group in which the radicals R1, R2, in each case, are situated at the phenylene part of -A, -B and m and n denote 0 or 1, but m+n is always zero or 1.

公开(公告)号：AT96460T

公开(公告)日：1993-11-15

申请号：AT88104519

申请日：1988-03-22

Applicant: HOECHST AG

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

IPC: G02F1/137 ,  C09K19/34 ,  C09K19/42 ,  G02F1/13 ,  G02F1/141

公开(公告)号：DE3880734D1

公开(公告)日：1993-06-09

申请号：DE3880734

申请日：1988-05-26

Applicant: HOECHST AG

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

IPC: C07D301/30 ,  C07D303/48 ,  C07D405/06 ,  C07D405/12 ,  C07D407/12 ,  C07D409/12 ,  C09K19/58 ,  G02F1/139 ,  G02F1/361 ,  G02F1/37

Abstract: Optically active oxirane-2-carboxylic esters with a mesogenic moiety are suitable for use as dopants in liquid crystal mixtures. They lead to liquid-crystalline ferroelectric phases having short response times and to electroclinic phases having large electroclinic coefficients. A further advantage is that they induce a helix of very small pitch, so that they are also suitable for helix compensation in LC mixtures.