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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 Defence Defence Evaluation & Research Agency

Evaluation Research Agency, Dra

Bch Chemicals Limited

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

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

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

David Lacey

George W Gray

Kenneth J Toyne

Richard M Scrowston

David Coates

Michael Hird

Adam Jackson

Lawrence Kam Chan

Ian Charles Sage

Alan W Hall

Damien Gerard McDonnell

Georg Weber

Andreas Wachtler

Michelle Jones

Daniel J Young

Joachim Krause

Madeline J Bradshaw

Keith Moray Blackwood

Victoria Brimmell

Peter A Gemmell

Volker Reiffenrath

Rudolf Eidenschink

Simon Greenfield

Edward P Raynes

Ulrich Finkenzeller

Thomas Geelhaar

Ciaran B McArdle

Michael Romer

Matthew F Bone

Amarjit Kaur Samra

Jennifer Constant

David Holmes

Martin G Pellatt

Gary Nestor

Ibrahim G Shenouda

Lawrence Kam Ming Chan

Eike Poetsch

John William Goodby

Jonathan S Hill

John A Jenner

Keith M Blackwood

David I Bishop

Georg H Mehl

Michael P Burrow

Richard M Scroston

Andrew M McRoberts

Raymond Denman

Abdul Luheshi

Steven Pringle

Ibraham G Shenouda

Bennett Sturgeon

Rudolf Eidensschink

Timothy Earl Mann

Peter H Balkwill

Andrew D Pearson

Julie Ann Haley

Wendy E Smith

Julie E Fearon

Liquid crystal polymers

Polysiloxanes

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

Growing community of inventors

Hull, United Kingdom

David Lacey