Essilor International (compagnie Generale D'optique)

Solvay Sa

Renault S.a.s.

Armines

Renault S.a.s.; Solvay Sa

Essilor International

Imerys Sa

Gaskatel Gesellschaft Für Gassysteme Durch Katalyse Und Elektrochemie Mbh

Imerys Pcc France

Marc Lacroix

Laure Meynie

Karine Cavalier

Ferdinand Hardinghaus

Johannes Eicher

Andreas Becker

Didier Sy

Alexandra Roos

Serge Bourbigot

Sophie Duquesne

Thomas Schwarze

Ardechir Momtaz

Nathalie Cornet

Virginie Boucher

Holger Pernice

Sebastian Hasenstab-Riedel

Jai-Won Park

Jean-Raphael Caille

Jean-Francois Hochepied

Jose-Marie Lopez-Cuesta

Gaëlle Rodary

Anne Christmann

Hans-Joachim Kohnke

Karl Köhler

Julien Pineau

Benoît Lefevre

Christian Jourquin

A method for dielectrically insulating active electric parts A method for dielectrically insulating an active electric part wherein the electrical active part is arranged in a gas-tight housing comprising an insulating gas which contains or consists of a compound of formula (i) Rf1-(O)x-Rf2 wherein Rf1 and Rf2 are identical or different and designated fluorocarbon residues having a H/F ratio of equal to or less than 0.5 and x is 1, 2, or 3.

Method for dielectrically insulating active electric parts

A method of preparing a transparent polymer material includes mixing mineral nanoparticles selected from nanoparticles of alkaline-earth metal carbonates, alkaline-earth metal sulfates, metallic oxides, oxides of metalloids, and siloxanes, and a composition A including at least one thermoplastic polymer in the molten state selected from polycarbonate (PC), polystyrene (PS) and polymethyl methacrylate (PMMA) in order to obtain a master-batch, the mixture of step i) including at least 25% and at most 75% by weight of the mineral nanoparticles. The master-batch obtained in step i) is mixed with a composition B of a thermoplastic polycarbonate matrix (PCm) in the molten state, to obtain a transparent polymer material including at most 10% by weight of the mineral nanoparticles, preferably at most 5% by weight of the mineral nanoparticles.

Method of preparing a transparent polumer material comprising a thermoplastic polycarbonate and mineral nanoparticles

A method of preparing a transparent polymer material includes i) obtaining composite nanoparticles having mineral nanoparticles at least partially coated with at least one monomer and/or at least one polymer suitable for promoting physicochemical interactions at the interface between the mineral nanoparticles and a thermoplastic polycarbonate matrix, the mineral nanoparticles being surface-modified by the monomer and/or the polymer, either directly by grafting or directly by adsorption of the monomer and/or polymer onto the surface of the mineral nanoparticles; or via a coupling agent selected from a chlorosilane or an organosilane including a functional group that is capable of reacting by a radical pathway. The composite nanoparticles obtained in step i) are mixed with the thermoplastic polycarbonate matrix in the molten state to obtain the transparent polymer material.

Method of preparing a transparent polymer material comprising a thermoplastic polycarbonate and surface-modified mineral nanoparticles

The present invention provides a method of preparing a transparent polymer material, the method comprising steps i) and ii) in any order, the steps consisting in:

Method for preparing a transparent polymer material including mineral nanoparticles with a shape factor strictly higher than 1.0

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Louvain-la-Neuve, Belgium

Marc Lacroix