The Secretary of State for Defence in Her Britannic Majesty's Government

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General Electric Company

Akzo N.v.

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The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland

The Secretary of State for Defense in Her Britannic Majesty's Government

The Secretary of State for Defence in Her Majesty's Government of the

Bch Chemicals Limited

Her Majesty's Government of the Uk.

The Secretary of State for for Defence in Her Britannic Majesty's

The Secretary of State for Defence in Her Britannic Majesty'3 S

Secretary of State for Defence in Her Britannic Majesty's Govt. of U.k.

The Secretary of State for Defence in Her Majesty'3 S Government of the

George W Gray

Kenneth J Toyne

David Lacey

Damien Gerard McDonnell

David Coates

Michael Hird

Richard M Scrowston

Edward P Raynes

Neil Carr

Adam Jackson

Lawrence Kam Chan

Georg Weber

Rudolf Eidenschink

Kenneth J Harrison

Joachim Krause

John William Goodby

Andreas Wachtler

Michael Romer

Sally Elizabeth Day

Jennifer Constant

Alexander J Seed

Daniel J Young

Damien Gerad McDonnel

Beatrice M Andrews

Ian Charles Sage

Simon Greenfield

Stephen M Kelly

Madeline J Bradshaw

Peter A Gemmell

Victoria Brimmell

Volker Reiffenrath

Ulrich Finkenzeller

Thomas Geelhaar

Ciaran B McArdle

Matthew F Bone

Amarjit Kaur Samra

David Holmes

Martin G Pellatt

Gary Nestor

Ibrahim G Shenouda

Christine Hogg

Beatrice M Nicholas

Lawrence Kam Ming Chan

Eike Poetsch

Owain Llyr Parri

John Clifford Jones

Mark John Goulding

Mark Andrew Verrall

John A Jenner

Timothy Jonathan Phillips

David I Bishop

David Richard Beattie

Alan Mosley

Wendy E Smith

Julie E Fearon

Richard M Scroston

Andrew M McRoberts

Raymond Denman

Abdul Luheshi

Ibraham G Shenouda

David Sherrington

Paul Hindmarsh

David Sanderson Hulme

Bennett Sturgeon

Hilal M Abdullah

Rudolf Eidensschink

Peter H Balkwill

Michael P Burrow

Andrew D Pearson

Liquid crystal compounds of formula (I) are described, where formula (I) is given as R,&mdash;A&mdash;(X),&mdash;(B),&mdash;R,where A is selected from naphthyl, fluorinated naphthyl, brominated naphthyl, B is selected from phenyl, methylated phenyl, brominated phenyl, fluorinated phenyl, thiophene, pyrimidine and pyridine. R,and R,are independently selected from alkyl, alkoxy, akynyl, thioalkyl, Br, CN, SCN, NCS, perfluoroalkyl, perfluoroalkoxy and hydrogen, X is selected from C&equiv;C, COO and C&equiv;C, m is 0 or 1, n is 0 or 1 where m is 1 and n is 0 where m is 0; provided that where A is naphthyl, n is 1 and m is 0 then B is selected from methylated phenyl, brominated phenyl, thiophene, pyrimidine and pyridine; and further provided that where A is naphthyl, X is C&equiv;C, m is 1 and n is 1, then B is selected from thiophene, pyrimidine and pyridine. Also described are liquid crystal compounds suitable for inclusion in devices utilizing pretransitional characteristics of liquid crystalline materials in the isotropic phase and described by formula (II): R,&mdash;J&mdash;(Y),&mdash;(Z),&mdash;R,, where J is selected from nathhyl, fluorinated naphthyl, brominated naphthyl, Z is selected from phenyl, methylated phenyl, brominated phenyl, fluorinated phenyl, thiophene, pyrimidine and pyridine, R,and R,are independently selected from alkyl, alkoxy, alkynyl, thioalkyl, Br, CN, SCN, NCS, perfluoroalkyl, perfluoroalkoxy and hydrogen, Y is selected from C&boxH;C, COO and C&boxH;C, p is 0 or 1, q is 0 or 1 where p is 1 and q is 0 where p is 0.

Naphthyl organic compounds

##STR1## The invention describes liquid crystalline compounds or formula (I), where A, D and G are independently selected from phenyl, thiophene, hydrogenated phenyl, chlorinated phenyl and fluorinated phenyl, B and E are independently selected from a single bond C.dbd..notident.C. C.tbd.C.C00, azoxy and diazo, k and m are independently selected from 1 and 0, such that m+n is 1 or 2, and R.sub.1 and R.sub.2 are independently selected from R, R0, alkynyl, thioalkyl, hydrogen, CN, NCS and SCN; provided that at least one of R.sub.1 and R.sub.2 is selected from CN, NCS and SCN and that at least one of A, D and G is phenyl; and excluding where at least one of R.sub.1 and R.sub.2 is independently selected as CN and one of A, D or G is not thiophene, and where m is 0, A, and D are phenyl, B is a single bond and only one of R.sub.1 or R.sub.2 is NCS. Also described are compounds suitable for inclusion in a device utilizing pretransitional characteristics of liquid crystalline materials in the isotropic phase, of general formula (II) where J and Y are independently selected from phenyl, thiophene, hydrogenated phenyl, chlorinated phenyl and fluorinated phenyl, X is selected from C.dbd..notident.C. C.tbd.C.COO azoxy and diazo, k is 1 or 0 and R.sub.3 and R.sub.4 are independently selected from R, RO, alkynyl, thioalkyl, hydrogen, CN, NCS and SCN; provided that at least one of R.sub.3 and R.sub.4 is selected from CN, NCS and SCN and that at least one of J and Y is phenyl.

Anisotropic organic compounds

The invention relates to an anisotropic polymer film or polymer net-work obtainable by photopolymerization of at least one mesogene-containing compound, having two side chains attached to a mesogenic core structure one of which is polymerizable, the other of which is capable of forming association dimers by hydrogen bonds.

Anisotropic polymer

Discotic compounds for use in liquid crystal mixtures

Liquid crystal compounds of formula (I) are described, where formula (I) is given as R.sub.1 --A--(X.sub.m --(B).sub.n --R.sub.2 where A is selected from nathyl, flourinated naphthyl, brominated naphthyl, B is selected from phenyl, methylated phenyl, brominated phenyl, fluorinated phenyl, thiophene, pyrimidine and pyridine, R.sub.1 and R.sub.2 are independently selected from alkyl, alkoxy, alkynyl, thioalkyl, Br, CN, SCN, NCS, perfluoroalkyl, perfluoroalkoxy and hydrogen, X is selected from C.tbd.C, COO and C.tbd.C, m is 0 or 1, n is 0 or 1 where m is 1 and n is 0 where m is 0; provided that where A is naphthyl, n is 1 and m is 0 then B is selected from methylated phenyl, brominated phenyl, thiophene, pyrimidine and pyridine; and further provided that where A is naphthyl, X is C.tbd.C, m is 1 and n is 1, then B is selected from thiophene, pyrimidine and pyridine. Also described are liquid crystal compounds suitable for inclusion in devices utilizing pretransitional characteristics of liquid crystalline materials in the isotropic phase and described by formula (II): R.sub.3 --J--(Y).sub.p --(Z).sub.q --R.sub. 4, where J is selected from nathyl, fluorinated naphthyl, brominated naphthyl, Z is selected from phenyl, methylated phenyl, brominated phenyl, fluorinated phenyl, thiophene, pyrimidine and pyridine, R.sub.1 and R.sub.2 are independently selected from alkyl, alkoxy, alkynyl, thioalkyl, Br, CN, SCN, NCS, perfluoroalkyl, perfluoroalkoxy and hydrogen, Y is selected from C.dbd.C, COO and C.dbd.C, p is 0 or 1, q is 0 or 1 where p is 1 and q is 0 where p is 0.

Optically active compounds of formula (I), where X has a structure (II) and B is C.sub.1-12 alkyl, a chiral group or a group having a general structure (III), where R and R' are H, C.sub.1-12 alkyl, alkoxy, alkylcarbonyloxy, or alkoxycarbonyl, each ring (IV) and (V) is the same or different, A and D are single bonds or bridging groups, each a and d is 0 or 1; Z, Z' are CN, Cl, F, Br or CF.sub.3 ; provided when Z is CN or Cl, then when B is alkyl X-Y is not (VI) or (VII). Ferroelectric smectic liquid crystal mixtures containing these compounds are also described. ##STR1##

Chiral liquid crystal compounds

The invention relates to the use of chiral and/or achiral compounds, containing at least one structural element from the group comprising

Media containing thiazole derivatives and thiadiazole derivatives and

There is disclosed a cyanoalkane and cyanoalkene of general formula (I) which shows liquid crystalline properties: wherein R and R.sup.1 are independently C.sub.1-12 alkyl, alkoxy, perfluoroalkyl or perfluoroalkoxy; rings A, B, C and D are independently phenyl, which may carry one or two halogen substituents, trans-cyclohexyl, or (2, 2, 2) bicyclooctyl, each of a, b, c or d being independently 0 or 1 provided (a+b+c+d) is 2 or 3; links A and C are independently a single bond, CH.sub.2 CH.sub.2, COO, OOC, CH.sub.2 O or OCH.sub.2 ; n, m and p are independently 0 or an integer 1 to 4 provided (n+m+p) is not 0; W and Z are independently selected --CH.dbd.C(CN)-- and --C(CN).dbd.CH--; X and Y are independently selected from --CHCN-- and --C(CN).sub.2 --; w, x, y and z are 0 or 1, provided that w and z are 0 if x and/or y are 1, and further provided that at least one of w, x, y and z is 1.

Liquid crystal cyanoalkanes and cyanoalkenes

This invention relates to novel chiral cyano-containing compounds suitable for use in ferroelectric smectic liquid crystal mixtures.

Laterally cyano- and fluoro-substituted terphenyls

Novel compounds of formula (I), in which R is R.sup.1, R.sup.1 O or R.sup.1 COO, where R.sup.1 is C.sub.1-12 alkyl, n and m are 0 or 1 provided that (n+m) is 0 or 1, each of a, b, c and d are independently 0 or 1, provided (a+b+c+d) is not zero, but excluding the case where a and b are 0 and m is 0 and one of c or d is 0 are described, being useful constituents of nematic liquid crystal materials.

Laterally fluorinated 4-cyanophenyl and 4'-cyanobiphenyl benzoates

Fluorinated 4'-cyano substituted terphenyls of general formula (I), wherein R.sub.1 is selected from alkenyl, H, R, RO and RCO where R is alkyl or perfluoroalkyl containing up to 12 carbon atoms, n is 1, 2 or 3 and the lateral fluorosubstituent(s) may be in any of the available substitution positions are provided. These have liquid crystalline properties and may be used as components of liquid crystal materials.

Fluorinated 4'-cyano substituted terphenyls

Fluorinated oligophenyls and their use in liquid crystal materials

The invention comprises liquid crystalline polyesters suited to be used as a medium for optical data storage, especially reversible (or erasable) optical data storage. The polyesters comprise the polycondensation product of an aliphatic dicarboxylic acid or a derivative thereof and propane diol which on its center carbon bears a mesogenic substituent comprising two rings, either alicyclic or aromatic. Preferably also the dicarboxylic acid or derivative thereof is mesogenically substituted. The invention further comprises a medium for optical data storage containing polyesters of the above type.

Liquid crystalline polyesters for optical data storage

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Cottingham, United Kingdom

George W Gray