Essilor International (Compagnie Generale D'optique)

Renault S.a.s.

Solvay Sa

Renault S.a.s.; Solvay Sa

Essilor International

Imerys Pcc France

Virginie Boucher

Didier Sy

Alexandra Roos

Serge Bourbigot

Sophie Duquesne

Marc Lacroix

Laure Meynie

Karine Cavalier

Nathalie Cornet

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

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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Villeneuve d'Ascq, France

Virginie Boucher