Hoffmann-la Roche Inc.

Rolic Ag

Dainippon Ink and Chemicals, Incorporated

Niopic Moscow Research and Production Association

Rolic Ltd C/o Rolic Technologies Ltd

Richard Buchecker

Martin Schadt

Alois Villiger

Guy Marck

Stephen Kelly

Jurg Funfschilling

Teodor Lukac

Hans-Jurgen Fromm

Arthur Boller

Klaus Schmitt

Olivier Muller

Alfred Germann

Haruyoshi Takatsu

Hubert Seiberle

Andreas Schuster

Carsten Benecke

Marina V Loseva

Nina I Chernova

Zoubair Mohammed Cherkaoui

Frans Leenhouts

Rolf-Peter Herr

Arnold Z Rabinovich

Frank Seils

Olga S Petrashevich

Evgeniy P Pozhidaev

Xin Hua Chen

Yasuyuki Tanaka

Kiyofumi Takeuchi

Emil A Broger

Yvo Crameri

Franco Moia

Vladimir G Chigrinov

Thomas Peglow

Victor V Titov

J&uuml;rg F&uuml;nfschilling

Leonid A Beresnev

Alexander V Ivashchenko

Vladimir F Petrov

Francedillaois Herzog

Fvgeniy P Pozhidaev

Yury P Panarin

Assya I Pavluchenko

Natalia I Smirnova

Alexander V Ivaschenko

Sandra Lupfert

Willy Friedrichsen

Jurg Fufschilling

A novel photoactive copolymer and its use as orientation layers for liquid crystals and in the construction of unstructured and structured optical elements and multilayer systems. The copolymer contains side chains incorporating photoreactive groups and simultaneously side chains of general formula (I) wherein the total number of rings, including the number of rings in optionally present condensed systems is at least two and at most six; wherein the broken line symbolizes the point of linkage to the polymer main chain; and wherein the variables are defined in the disclosure.

Photoactive copolymer

A mesogenic, crosslinkable mixture comprising at least one polymerisable liquid crystal and at least one polymerisable dichroic dye of the general formula I: wherein A represents a dichroic residue exhibiting at least partial absorption in the visible region &#x3e;400 nm; n1, n2, n3, n4 signifies 0 or 1 whereby the sum of n1, n2, n3 and n4 is &#x3e;0, and Band Brepresent a group of substructure II 

Dichroic mixtures

A photoactive side-chain polymer from the class of polyimides, polyamide acids and esters thereof, comprising as a side-chain a dendritic block incorporating photoactive groups at its surface. The dendritic block preferably represents a unit of formulae Ia, Ib or a combination of them, for example formulae Ic, wherein the broken line symbolizes the linkage to the polyimide main chain. The polymer may be used as an orientation layer for liquid crystals and in the construction of unstructured and structured optical elements and multi-layer systems.

Photoactive polymer

Photoactive polyimides, polyamide acids or esters with side chain photocrosslinkable groups

Laterally substituted curable liquid crystals

Photocrosslinkable polymers

Optically active butane-1,2,3,4-tetraol derivatives of formula (I). The compounds may be used as doping agents for liquid crystals for a wide range of applications, such as solid state cholesteric filters for projection displays, circular polarizers, and optical filters.

Optically active compounds

Photocrosslinkable, mesogenic mixtures, especially for optical or electro-optical devices, exhibit improved properties when, in addition to containing two or more liquid-crystalline monomers each having at least two terminal polymerizable groups, they contain at least one non-liquid-crystalline monomer having no or, at most, one alicyclic or aromatic structural unit and having at least one terminal polymerizable group.

Liquid-crystalline photocrosslinkable mixture

Photocrosslinkable polyimides

The invention relates to novel crosslinkable, photoactive silane derivatives of the formula I

Photocrosslinkable silane derivatives

Optically active bis-dioxane derivatives

An optical frequency conversion element has a wave-guiding layer which consists of a .chi..sup.(2) -active ferroelectric liquid crystal. The monomeric or polymeric liquid crystal material has a periodic structure which permits the so-called quasi phase matching of a guided laser beam. The period length of the structure is equal to twice the coherence length l.sub.c =.pi./.DELTA..beta. of the material, whereby .DELTA..beta.=.beta..sub.o (2.omega.)-2.beta..sub.o (.omega.), with .omega.=angular frequency of the fundamental wave, 0=zero-order mode and .beta.=propagation constant of the mode.

Optical element and compounds used in its manufacture

Polymerisable optically active compounds have the general formula: ##STR1## where: W.sup.1 denotes a polymerisable residue,

Polymerisable, optically active dioxolane diesters

The invention provides novel cross-linkable, photoactive silane derivatives and mixtures with 3-aryl-acrylic acid esters and amides. The present invention also provides orienting layers for liquid crystals, and non-structured and structured optical elements and multi-layer systems based on the silane mixtures and derivatives.

Photoactive silane derivatives for liquid crystals

Growing community of inventors

Zurich, Switzerland

Richard Buchecker