Thomson-csf

Thompson-csf

Francoise Soyer

Pierre Le Barny

Jean-Claude Dubois

Jean Claude Dubois

Marie Vergnolle

Sophie Muller

Jean-Claude Dudois

Guy Decobert

Evelyne Chastaing

The disclosure relates to fluorinated chiral liquid crystals that incorporate a cyclohexyl grouping in their structure. They can be used as dopants and lead to mixtures of ferroelectric liquid crystals that have an application in display systems. They meet the following chemical formula. ##STR1## with 1.ltoreq.n.ltoreq.14 if X=CH.sub.2 Y=--CH.sub.2 -- with R=CmH.sub.2m+1 and 5.ltoreq.m.ltoreq.16 ##STR2##

Fluorinated liquid crystals

This invention concerns new molecules with active, non-linear optical properties and which can be thermally reticulated (more precisely, these molecules include terminal functions which can be reticulated, attached to either side of the groups active in non-linear optics, which can be oriented under an electrical field). When reticulated and oriented under an electrical field, these materials are particularly stable and can be employed for industrial applications, using non-linear optics (electrooptical modulators, frequency doublers, etc.).

Thermally reticulated materials for non-linear optical applications

The invention concerns a family of thermotropic polymers of the mesogenic the lateral group of which have at least one mesomorphous phase and obtained from a monomer having the general formula: ##STR1## in which R.sub.1 .dbd.CH.sub.3, Cl or H and 2.ltoreq.n.ltoreq.11.

Thermotropic polymers with lateral chains having a chiral structure and

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Villebon sur Yvette, France

Francoise Soyer